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<html lang="zh-CN" class="notranslate" translate="no"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>ESP32 ArduinoMqttClient使用指南 - DeepSeek</title><meta name="viewport" content="initial-scale=1.0,maximum-scale=1,width=device-width,viewport-fit=cover"><meta name="commit-id" content="d97a33f"><meta name="description" content="Chat with DeepSeek AI – your intelligent assistant for coding, content creation, file reading, and more. Upload documents, engage in long-context conversations, and get expert help in AI, natural language processing, and beyond. | 深度求索（DeepSeek）助力编程代码开发、创意写作、文件处理等任务，支持文件上传及长文本对话，随时为您提供高效的AI支持。"><meta name="keywords" content="DeepSeek,DeepSeek AI,DeepSeek Chat,AI assistant,coding assistant,long-context LLM,Open Source LLM,natural language processing,AI chatbot,AI long text,AI content creation,large language model,深度求索,大语言模型,自然语言处理,AI聊天机器人,代码开发,创意写作,AI助手,长文本对话,文件处理AI,大模型公司,人工智能,AI开发助手"><meta property="og:url" content="https://chat.deepseek.com"><meta property="og:type" content="website"><meta property="og:title" content="DeepSeek"><meta property="og:description" content="Chat with DeepSeek AI."><meta property="og:image" content="https://cdn.deepseek.com/images/deepseek-chat-open-graph-image.jpeg"><meta name="twitter:card" content="summary_large_image"><meta property="twitter:domain" content="deepseek.com"><meta property="twitter:url" content="https://chat.deepseek.com"><meta name="twitter:title" content="DeepSeek"><meta name="twitter:description" content="Chat with DeepSeek AI."><meta name="twitter:image" content="https://cdn.deepseek.com/images/deepseek-chat-open-graph-image.jpeg"><meta name="google" content="notranslate"><meta name="ip" content="183.45.77.145"><meta name="region" content="CN"><link rel="apple-touch-icon" href="https://cdn.deepseek.com/chat/icon.png"><link rel="icon" type="image/x-icon" href="https://chat.deepseek.com/favicon.svg"><script type="text/javascript" async="" id="_intercom_npm_loader" src="./ESP32 ArduinoMqttClient使用指南 - DeepSeek_files/guh50jw4"></script><script>!function(n,t){if(n.LogAnalyticsObject=t,!n[t]){var c=function(){c.q.push(arguments)};c.q=c.q||[],n[t]=c}n[t].l=+new Date}(window,"collectEvent")</script><script async="" src="./ESP32 ArduinoMqttClient使用指南 - DeepSeek_files/collect-rangers-v5.2.1.js.下载"></script><script>(()=>{"use strict";let e=function(){return"function"!=typeof window.collectEvent?()=>0:window.collectEvent.apply(window,arguments)},t=null,n=!1,o={en:{t:"Resource Loading Error",d:"Unable to load page resources. Please refresh and try again.",b:"Refresh Page"},zh:{t:"资源加载异常",d:"页面资源加载异常，请刷新重试",b:"刷新页面"}};window._sriCk=function(){var a;let r,l,i,s=(e=>{let t=navigator.languages||[navigator.language||""];for(let n=0;n<t.length;n++){let o=t[n].toLowerCase().split("-")[0];if(e.includes(o))return o}return null})(Object.keys(o)),c=s?o[s]:o.en,d='<div class="_sri-ck"><style>._sri-ck{width:fit-content;margin:20vh auto}</style>';d+='<img src="https://cdn.deepseek.com/logo.png" alt="Logo" class="logo" width=114 height=24><h1 class="title">'+c.t+'</h1><p class="desc">'+c.d+'</p><button class="btn" onclick="location.reload()">'+c.b+"</button></div>",(i=(l=document).createElement("div"),l.body.replaceChildren(i),i).innerHTML=d,a=arguments,n||(n=!0,e("start"),e("init",{app_id:0x13145ad,channel_domain:"https://gator.volces.com",enable_storage:!0,disable_sdk_monitor:!0}),(r=document.head.querySelector('meta[name="commit-id"]'))&&(t=r.getAttribute("content"))),e("scriptLoadError",{src:a[0]?a[0].src:"",dsp__commitId:t})}})()</script><script defer="" onerror="_sriCk(this)" src="./ESP32 ArduinoMqttClient使用指南 - DeepSeek_files/default-vendors.529c2d46d2.js.下载"></script><script defer="" onerror="_sriCk(this)" src="./ESP32 ArduinoMqttClient使用<EFBFBD><EFBFBD>
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<span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><ArduinoMqttClient.h></span></span>
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<span class="token comment">// WiFi配置</span>
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<span class="token keyword">const</span> <span class="token keyword">char</span><span class="token operator">*</span> ssid <span class="token operator">=</span> <span class="token string">"your_SSID"</span><span class="token punctuation">;</span>
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<span class="token keyword">const</span> <span class="token keyword">char</span><span class="token operator">*</span> password <span class="token operator">=</span> <span class="token string">"your_PASSWORD"</span><span class="token punctuation">;</span>
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<span class="token comment">// MQTT配置</span>
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<span class="token keyword">const</span> <span class="token keyword">char</span><span class="token operator">*</span> broker <span class="token operator">=</span> <span class="token string">"broker.hivemq.com"</span><span class="token punctuation">;</span>
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<span class="token keyword">int</span> port <span class="token operator">=</span> <span class="token number">1883</span><span class="token punctuation">;</span>
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<span class="token keyword">const</span> <span class="token keyword">char</span><span class="token operator">*</span> topic <span class="token operator">=</span> <span class="token string">"esp32/test"</span><span class="token punctuation">;</span>
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WiFiClient wifiClient<span class="token punctuation">;</span>
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MqttClient <span class="token function">mqttClient</span><span class="token punctuation">(</span>wifiClient<span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token keyword">void</span> <span class="token function">setup</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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Serial<span class="token punctuation">.</span><span class="token function">begin</span><span class="token punctuation">(</span><span class="token number">115200</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token comment">// 连接WiFi</span>
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<span class="token function">connectWiFi</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token comment">// 设置MQTT</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">setId</span><span class="token punctuation">(</span><span class="token string">"ESP32_Client"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">setUsernamePassword</span><span class="token punctuation">(</span><span class="token string">"username"</span><span class="token punctuation">,</span> <span class="token string">"password"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// 如果需要</span>
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<span class="token comment">// 连接MQTT代理</span>
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<span class="token function">connectMQTT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token comment">// 订阅主题</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">subscribe</span><span class="token punctuation">(</span>topic<span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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<span class="token keyword">void</span> <span class="token function">loop</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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<span class="token comment">// 保持MQTT连接</span>
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<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token operator">!</span>mqttClient<span class="token punctuation">.</span><span class="token function">connected</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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<span class="token function">connectMQTT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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<span class="token comment">// 处理接收的消息</span>
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<span class="token keyword">int</span> messageSize <span class="token operator">=</span> mqttClient<span class="token punctuation">.</span><span class="token function">parseMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token keyword">if</span> <span class="token punctuation">(</span>messageSize<span class="token punctuation">)</span> <span class="token punctuation">{</span>
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<span class="token function">handleMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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<span class="token comment">// 发布消息示例</span>
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<span class="token keyword">static</span> <span class="token keyword">unsigned</span> <span class="token keyword">long</span> lastPublish <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span>
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<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">millis</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-</span> lastPublish <span class="token operator">></span> <span class="token number">5000</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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<span class="token function">publishMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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lastPublish <span class="token operator">=</span> <span class="token function">millis</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">poll</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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<span class="token keyword">void</span> <span class="token function">connectWiFi</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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Serial<span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span><span class="token string">"Connecting to WiFi"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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WiFi<span class="token punctuation">.</span><span class="token function">begin</span><span class="token punctuation">(</span>ssid<span class="token punctuation">,</span> password<span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token keyword">while</span> <span class="token punctuation">(</span>WiFi<span class="token punctuation">.</span><span class="token function">status</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">!=</span> WL_CONNECTED<span class="token punctuation">)</span> <span class="token punctuation">{</span>
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<span class="token function">delay</span><span class="token punctuation">(</span><span class="token number">500</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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Serial<span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span><span class="token string">"."</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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Serial<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"\nConnected to WiFi!"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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Serial<span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span><span class="token string">"IP Address: "</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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Serial<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>WiFi<span class="token punctuation">.</span><span class="token function">localIP</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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<span class="token keyword">void</span> <span class="token function">connectMQTT</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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Serial<span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span><span class="token string">"Connecting to MQTT broker..."</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token keyword">while</span> <span class="token punctuation">(</span><span class="token operator">!</span>mqttClient<span class="token punctuation">.</span><span class="token function">connect</span><span class="token punctuation">(</span>broker<span class="token punctuation">,</span> port<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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Serial<span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span><span class="token string">"."</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token function">delay</span><span class="token punctuation">(</span><span class="token number">1000</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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Serial<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"\nConnected to MQTT broker!"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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<span class="token keyword">void</span> <span class="token function">handleMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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Serial<span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span><span class="token string">"Received message on topic: "</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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Serial<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>mqttClient<span class="token punctuation">.</span><span class="token function">messageTopic</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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Serial<span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span><span class="token string">"Message: "</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token keyword">while</span> <span class="token punctuation">(</span>mqttClient<span class="token punctuation">.</span><span class="token function">available</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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Serial<span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token keyword">char</span><span class="token punctuation">)</span>mqttClient<span class="token punctuation">.</span><span class="token function">read</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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Serial<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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<span class="token keyword">void</span> <span class="token function">publishMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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String message <span class="token operator">=</span> <span class="token string">"Hello from ESP32 - "</span> <span class="token operator">+</span> <span class="token function">String</span><span class="token punctuation">(</span><span class="token function">millis</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">beginMessage</span><span class="token punctuation">(</span>topic<span class="token punctuation">)</span><span class="token punctuation">;</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span>message<span class="token punctuation">)</span><span class="token punctuation">;</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">endMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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Serial<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"Message published: "</span> <span class="token operator">+</span> message<span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span></pre><svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 12 12" fill="none" class="_9bc997d _33882ae"><path d="M-5.24537e-07 0C-2.34843e-07 6.62742 5.37258 12 12 12L0 12L-5.24537e-07 0Z" fill="currentColor"></path></svg><svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 12 12" fill="none" class="_9bc997d _28d7e84"><path d="M-5.24537e-07 0C-2.34843e-07 6.62742 5.37258 12 12 12L0 12L-5.24537e-07 0Z" fill="currentColor"></path></svg></div><h2><span>3. 高级功能示例</span></h2><div class="md-code-block md-code-block-light"><div class="md-code-block-banner-wrap"><div class="md-code-block-banner md-code-block-banner-lite"><div class="_121d384"><div class="d2a24f03"><span class="d813de27">cpp</span></div><div class="d2a24f03 _246a029"><div class="efa13877"><button role="button" aria-disabled="false" class="ds-atom-button ds-text-button ds-text-button--with-icon" style="margin-right: 4px;"><div class="ds-icon ds-atom-button__icon" style="font-size: 16px; width: 16px; height: 16px; margin-right: 3px;"><svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M6.14926 4.02039C7.11194 4.02039 7.8798 4.02023 8.49594 4.07605C9.12125 4.13276 9.65789 4.25194 10.1414 4.53113C10.7201 4.86536 11.2008 5.34597 11.535 5.92468C11.8142 6.40824 11.9334 6.94488 11.9901 7.57019C12.0459 8.18631 12.0457 8.95426 12.0457 9.91687C12.0457 10.8795 12.0459 11.6474 11.9901 12.2635C11.9334 12.8889 11.8142 13.4255 11.535 13.9091C11.2008 14.4877 10.7201 14.9684 10.1414 15.3026C9.65789 15.5818 9.12125 15.701 8.49594 15.7577C7.87981 15.8135 7.11193 15.8134 6.14926 15.8134C5.18664 15.8134 4.41871 15.8135 3.80258 15.7577C3.17727 15.701 2.64063 15.5818 2.15707 15.3026C1.57837 14.9684 1.09775 14.4877 0.763519 13.9091C0.484335 13.4255 0.365153 12.8889 0.308441 12.2635C0.252618 11.6474 0.252777 10.8795 0.252777 9.91687C0.252777 8.95425 0.252634 8.18632 0.308441 7.57019C0.365153 6.94488 0.484335 6.40824 0.763519 5.92468C1.09774 5.34596 1.57836 4.86535 2.15707 4.53113C2.64063 4.25194 3.17727 4.13276 3.80258 4.07605C4.41871 4.02024 5.18663 4.02039 6.14926 4.02039ZM6.14926 5.37781C5.16178 5.37781 4.46631 5.37768 3.92563 5.42664C3.39431 5.47479 3.07856 5.5658 2.83578 5.70593C2.46317 5.92112 2.15351 6.23077 1.93832 6.60339C1.7982 6.84617 1.70718 7.16192 1.65903 7.69324C1.61007 8.23391 1.6102 8.9294 1.6102 9.91687C1.6102 10.9044 1.61006 11.5998 1.65903 12.1405C1.70718 12.6718 1.7982 12.9876 1.93832 13.2303C2.15352 13.6029 2.46318 13.9126 2.83578 14.1278C3.07856 14.2679 3.39431 14.3589 3.92563 14.4071C4.46631 14.4561 5.16179 14.4559 6.14926 14.4559C7.13679 14.4559 7.83221 14.4561 8.37289 14.4071C8.90422 14.3589 9.21996 14.2679 9.46274 14.1278C9.83532 13.9126 10.145 13.6029 10.3602 13.2303C10.5003 12.9876 10.5913 12.6718 10.6395 12.1405C10.6885 11.5998 10.6883 10.9044 10.6883 9.91687C10.6883 8.92941 10.6885 8.23391 10.6395 7.69324C10.5913 7.16192 10.5003 6.84617 10.3602 6.60339C10.145 6.23078 9.83533 5.92113 9.46274 5.70593C9.21996 5.5658 8.90421 5.47479 8.37289 5.42664C7.83221 5.37766 7.13679 5.37781 6.14926 5.37781ZM9.80161 0.368042C10.7638 0.368042 11.5314 0.367947 12.1473 0.423706C12.7725 0.480374 13.3093 0.598826 13.7928 0.877808C14.3716 1.21198 14.8521 1.69361 15.1864 2.27234C15.4655 2.75581 15.5857 3.29171 15.6424 3.91687C15.6983 4.53307 15.6971 5.30167 15.6971 6.26453V7.82996C15.6971 8.29271 15.6989 8.59 15.6649 8.84851C15.4668 10.3526 14.4009 11.5739 12.9832 11.9989V10.5468C13.6973 10.1904 14.2104 9.49669 14.3192 8.67175C14.3387 8.52354 14.3407 8.33586 14.3407 7.82996V6.26453C14.3407 5.27713 14.3398 4.58155 14.2909 4.04089C14.2427 3.50975 14.1526 3.19379 14.0125 2.95105C13.7974 2.57856 13.4875 2.26876 13.1151 2.05359C12.8723 1.91353 12.5564 1.82244 12.0252 1.77429C11.4847 1.72534 10.7888 1.72546 9.80161 1.72546H7.71469C6.75617 1.72565 5.92662 2.27704 5.52328 3.07898H4.07016C4.54218 1.51138 5.99317 0.368253 7.71469 0.368042H9.80161Z" fill="currentColor"></path></svg></div><span class=""><span class="code-info-button-text">复<EFBFBD><EFBFBD>
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<span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><ArduinoMqttClient.h></span></span>
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WiFiClient wifiClient<span class="token punctuation">;</span>
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MqttClient <span class="token function">mqttClient</span><span class="token punctuation">(</span>wifiClient<span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token comment">// 回调函数设置</span>
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<span class="token keyword">void</span> <span class="token function">setupMQTTCallbacks</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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<span class="token comment">// 设置消息回调（需要重写 onMessage 方法）</span>
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<span class="token comment">// 或者使用以下方式处理消息</span>
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<span class="token comment">// 设置连接状态回调</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">onConnect</span><span class="token punctuation">(</span>onMqttConnect<span class="token punctuation">)</span><span class="token punctuation">;</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">onDisconnect</span><span class="token punctuation">(</span>onMqttDisconnect<span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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<span class="token keyword">void</span> <span class="token function">onMqttConnect</span><span class="token punctuation">(</span><span class="token keyword">bool</span> sessionPresent<span class="token punctuation">)</span> <span class="token punctuation">{</span>
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Serial<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"Connected to MQTT broker"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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Serial<span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span><span class="token string">"Session present: "</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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Serial<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>sessionPresent<span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token comment">// 连接后订阅多个主题</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">subscribe</span><span class="token punctuation">(</span><span class="token string">"esp32/sensor/temperature"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">subscribe</span><span class="token punctuation">(</span><span class="token string">"esp32/sensor/humidity"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">subscribe</span><span class="token punctuation">(</span><span class="token string">"esp32/control/#"</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// 使用通配符</span>
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<span class="token punctuation">}</span>
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<span class="token keyword">void</span> <span class="token function">onMqttDisconnect</span><span class="token punctuation">(</span><span class="token keyword">int</span> reason<span class="token punctuation">)</span> <span class="token punctuation">{</span>
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Serial<span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span><span class="token string">"MQTT disconnected, reason: "</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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Serial<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>reason<span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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<span class="token comment">// QoS设置示例</span>
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<span class="token keyword">void</span> <span class="token function">publishWithQoS</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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<span class="token comment">// QoS 0 - 最多一次</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">beginMessage</span><span class="token punctuation">(</span><span class="token string">"esp32/qos0"</span><span class="token punctuation">,</span> <span class="token boolean">false</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span><span class="token string">"QoS 0 message"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">endMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token comment">// QoS 1 - 至少一次</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">beginMessage</span><span class="token punctuation">(</span><span class="token string">"esp32/qos1"</span><span class="token punctuation">,</span> <span class="token boolean">false</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span><span class="token string">"QoS 1 message"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">endMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token comment">// QoS 2 - 恰好一次</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">beginMessage</span><span class="token punctuation">(</span><span class="token string">"esp32/qos2"</span><span class="token punctuation">,</span> <span class="token boolean">false</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span><span class="token string">"QoS 2 message"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">endMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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<span class="token comment">// 保留消息示例</span>
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<span class="token keyword">void</span> <span class="token function">publishRetainedMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">beginMessage</span><span class="token punctuation">(</span><span class="token string">"esp32/status"</span><span class="token punctuation">,</span> <span class="token boolean">true</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// true表示保留消息</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span><span class="token string">"online"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">endMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span></pre><svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 12 12" fill="none" class="_9bc997d _33882ae"><path d="M-5.24537e-07 0C-2.34843e-07 6.62742 5.37258 12 12 12L0 12L-5.24537e-07 0Z" fill="currentColor"></path></svg><svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 12 12" fill="none" class="_9bc997d _28d7e84"><path d="M-5.24537e-07 0C-2.34843e-07 6.62742 5.37258 12 12 12L0 12L-5.24537e-07 0Z" fill="currentColor"></path></svg></div><h2><span>4. 完整项目示例 - 传感器数据发布</span></h2><div class="md-code-block md-code-block-light"><div class="md-code-block-banner-wrap"><div class="md-code-block-banner md-code-block-banner-lite"><div class="_121d384"><div class="d2a24f03"><span class="d813de27">cpp</span></div><div class="d2a24f03 _246a029"><div class="efa13877"><button role="button" aria-disabled="false" class="ds-atom-button ds-text-button ds-text-button--with-icon" style="margin-right: 4px;"><div class="ds-icon ds-atom-button__icon" style="font-size: 16px; width: 16px; height: 16px; margin-right: 3px;"><svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M6.14926 4.02039C7.11194 4.02039 7.8798 4.02023 8.49594 4.07605C9.12125 4.13276 9.65789 4.25194 10.1414 4.53113C10.7201 4.86536 11.2008 5.34597 11.535 5.92468C11.8142 6.40824 11.9334 6.94488 11.9901 7.57019C12.0459 8.18631 12.0457 8.95426 12.0457 9.91687C12.0457 10.8795 12.0459 11.6474 11.9901 12.2635C11.9334 12.8889 11.8142 13.4255 11.535 13.9091C11.2008 14.4877 10.7201 14.9684 10.1414 15.3026C9.65789 15.5818 9.12125 15.701 8.49594 15.7577C7.87981 15.8135 7.11193 15.8134 6.14926 15.8134C5.18664 15.8134 4.41871 15.8135 3.80258 15.7577C3.17727 15.701 2.64063 15.5818 2.15707 15.3026C1.57837 14.9684 1.09775 14.4877 0.763519 13.9091C0.484335 13.4255 0.365153 12.8889 0.308441 12.2635C0.252618 11.6474 0.252777 10.8795 0.252777 9.91687C0.252777 8.95425 0.252634 8.18632 0.308441 7.57019C0.365153 6.94488 0.484335 6.40824 0.763519 5.92468C1.09774 5.34596 1.57836 4.86535 2.15707 4.53113C2.64063 4.25194 3.17727 4.13276 3.80258 4.07605C4.41871 4.02024 5.18663 4.02039 6.14926 4.02039ZM6.14926 5.37781C5.16178 5.37781 4.46631 5.37768 3.92563 5.42664C3.39431 5.47479 3.07856 5.5658 2.83578 5.70593C2.46317 5.92112 2.15351 6.23077 1.93832 6.60339C1.7982 6.84617 1.70718 7.16192 1.65903 7.69324C1.61007 8.23391 1.6102 8.9294 1.6102 9.91687C1.6102 10.9044 1.61006 11.5998 1.65903 12.1405C1.70718 12.6718 1.7982 12.9876 1.93832 13.2303C2.15352 13.6029 2.46318 13.9126 2.83578 14.1278C3.07856 14.2679 3.39431 14.3589 3.92563 14.4071C4.46631 14.4561 5.16179 14.4559 6.14926 14.4559C7.13679 14.4559 7.83221 14.4561 8.37289 14.4071C8.90422 14.3589 9.21996 14.2679 9.46274 14.1278C9.83532 13.9126 10.145 13.6029 10.3602 13.2303C10.5003 12.9876 10.5913 12.6718 10.6395 12.1405C10.6885 11.5998 10.6883 10.9044 10.6883 9.91687C10.6883 8.92941 10.6885 8.23391 10.6395 7.69324C10.5913 7.16192 10.5003 6.84617 10.3602 6.60339C10.145 6.23078 9.83533 5.92113 9.46274 5.70593C9.21996 5.5658 8.90421 5.47479 8.37289 5.42664C7.83221 5.37766 7.13679 5.37781 6.14926 5.37781ZM9.80161 0.368042C10.7638 0.368042 11.5314 0.367947 12.1473 0.423706C12.7725 0.480374 13.3093 0.598826 13.7928 0.877808C14.3716 1.21198 14.8521 1.69361 15.1864 2.27234C15.4655 2.75581 15.5857 3.29171 15.6424 3.91687C15.6983 4.53307 15.6971 5.30167 15.6971 6.26453V7.82996C15.6971 8.29271 15.6989 8.59 15.6649 8.84851C15.4668 10.3526 14.4009 11.5739 12.9832 11.9989V10.5468C13.6973 10.1904 14.2104 9.49669 14.3192 8.67175C14.3387 8.52354 14.3407 8.33586 14.3407 7.82996V6.26453C14.3407 5.27713 14.3398 4.58155 14.2909 4.04089C14.2427 3.50975 14.1526 3.19379 14.0125 2.95105C13.7974 2.57856 13.4875 2.26876 13.1151 2.05359C12.8723 1.91353 12.5564 1.82244 12.0252 1.77429C11.4847 1.72534 10.7888 1.72546 9.80161 1.72546H7.71469C6.75617 1.72565 5.92662 2.27704 5.52328 3.07898H4.07016C4.54218 1.51138 5.99317 0.368253 7.71469 0.368042H9.80161Z" fill="currentColor"></path></svg></div><span class=""><span class="code
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<span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><ArduinoMqttClient.h></span></span>
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<span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">include</span> <span class="token string"><DHT.h></span></span>
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<span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">define</span> <span class="token macro-name">DHT_PIN</span> <span class="token expression"><span class="token number">4</span></span></span>
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<span class="token macro property"><span class="token directive-hash">#</span><span class="token directive keyword">define</span> <span class="token macro-name">DHT_TYPE</span> <span class="token expression">DHT11</span></span>
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<span class="token comment">// WiFi配置</span>
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<span class="token keyword">const</span> <span class="token keyword">char</span><span class="token operator">*</span> ssid <span class="token operator">=</span> <span class="token string">"your_SSID"</span><span class="token punctuation">;</span>
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<span class="token keyword">const</span> <span class="token keyword">char</span><span class="token operator">*</span> password <span class="token operator">=</span> <span class="token string">"your_PASSWORD"</span><span class="token punctuation">;</span>
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<span class="token comment">// MQTT配置</span>
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<span class="token keyword">const</span> <span class="token keyword">char</span><span class="token operator">*</span> broker <span class="token operator">=</span> <span class="token string">"broker.hivemq.com"</span><span class="token punctuation">;</span>
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<span class="token keyword">int</span> port <span class="token operator">=</span> <span class="token number">1883</span><span class="token punctuation">;</span>
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WiFiClient wifiClient<span class="token punctuation">;</span>
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MqttClient <span class="token function">mqttClient</span><span class="token punctuation">(</span>wifiClient<span class="token punctuation">)</span><span class="token punctuation">;</span>
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DHT <span class="token function">dht</span><span class="token punctuation">(</span>DHT_PIN<span class="token punctuation">,</span> DHT_TYPE<span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token comment">// 主题定义</span>
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<span class="token keyword">const</span> <span class="token keyword">char</span><span class="token operator">*</span> tempTopic <span class="token operator">=</span> <span class="token string">"esp32/sensor/temperature"</span><span class="token punctuation">;</span>
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<span class="token keyword">const</span> <span class="token keyword">char</span><span class="token operator">*</span> humidTopic <span class="token operator">=</span> <span class="token string">"esp32/sensor/humidity"</span><span class="token punctuation">;</span>
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<span class="token keyword">const</span> <span class="token keyword">char</span><span class="token operator">*</span> statusTopic <span class="token operator">=</span> <span class="token string">"esp32/status"</span><span class="token punctuation">;</span>
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<span class="token keyword">void</span> <span class="token function">setup</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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Serial<span class="token punctuation">.</span><span class="token function">begin</span><span class="token punctuation">(</span><span class="token number">115200</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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dht<span class="token punctuation">.</span><span class="token function">begin</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token function">connectWiFi</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token function">setupMQTT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token comment">// 发布设备在线状态（保留消息）</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">beginMessage</span><span class="token punctuation">(</span>statusTopic<span class="token punctuation">,</span> <span class="token boolean">true</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span><span class="token string">"online"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">endMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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<span class="token keyword">void</span> <span class="token function">setupMQTT</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">setId</span><span class="token punctuation">(</span><span class="token string">"ESP32_Sensor_"</span> <span class="token operator">+</span> <span class="token function">String</span><span class="token punctuation">(</span><span class="token function">random</span><span class="token punctuation">(</span><span class="token number">0xffff</span><span class="token punctuation">)</span><span class="token punctuation">,</span> HEX<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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Serial<span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span><span class="token string">"Connecting to MQTT..."</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token operator">!</span>mqttClient<span class="token punctuation">.</span><span class="token function">connect</span><span class="token punctuation">(</span>broker<span class="token punctuation">,</span> port<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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Serial<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">" failed!"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token keyword">return</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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Serial<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">" success!"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token comment">// 订阅控制主题</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">subscribe</span><span class="token punctuation">(</span><span class="token string">"esp32/control/interval"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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<span class="token keyword">void</span> <span class="token function">loop</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token operator">!</span>mqttClient<span class="token punctuation">.</span><span class="token function">connected</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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<span class="token function">reconnectMQTT</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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<span class="token comment">// 处理接收的消息</span>
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<span class="token keyword">int</span> messageSize <span class="token operator">=</span> mqttClient<span class="token punctuation">.</span><span class="token function">parseMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token keyword">if</span> <span class="token punctuation">(</span>messageSize<span class="token punctuation">)</span> <span class="token punctuation">{</span>
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<span class="token function">handleMQTTMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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<span class="token comment">// 每10秒发布传感器数据</span>
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<span class="token keyword">static</span> <span class="token keyword">unsigned</span> <span class="token keyword">long</span> lastSensorRead <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span>
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<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token function">millis</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">-</span> lastSensorRead <span class="token operator">></span> <span class="token number">10000</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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<span class="token function">publishSensorData</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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lastSensorRead <span class="token operator">=</span> <span class="token function">millis</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">poll</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token function">delay</span><span class="token punctuation">(</span><span class="token number">100</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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<span class="token keyword">void</span> <span class="token function">handleMQTTMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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String topic <span class="token operator">=</span> mqttClient<span class="token punctuation">.</span><span class="token function">messageTopic</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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String message <span class="token operator">=</span> <span class="token string">""</span><span class="token punctuation">;</span>
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<span class="token keyword">while</span> <span class="token punctuation">(</span>mqttClient<span class="token punctuation">.</span><span class="token function">available</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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message <span class="token operator">+=</span> <span class="token punctuation">(</span><span class="token keyword">char</span><span class="token punctuation">)</span>mqttClient<span class="token punctuation">.</span><span class="token function">read</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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Serial<span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span><span class="token string">"Message on '"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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Serial<span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span>topic<span class="token punctuation">)</span><span class="token punctuation">;</span>
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Serial<span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span><span class="token string">"': "</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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Serial<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>message<span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token keyword">if</span> <span class="token punctuation">(</span>topic <span class="token operator">==</span> <span class="token string">"esp32/control/interval"</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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<span class="token comment">// 处理控制消息</span>
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<span class="token keyword">int</span> interval <span class="token operator">=</span> message<span class="token punctuation">.</span><span class="token function">toInt</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token keyword">if</span> <span class="token punctuation">(</span>interval <span class="token operator">></span> <span class="token number">0</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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<span class="token comment">// 更新发布间隔</span>
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Serial<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"Update interval: "</span> <span class="token operator">+</span> <span class="token function">String</span><span class="token punctuation">(</span>interval<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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<span class="token punctuation">}</span>
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<span class="token punctuation">}</span>
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<span class="token keyword">void</span> <span class="token function">publishSensorData</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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<span class="token keyword">float</span> temperature <span class="token operator">=</span> dht<span class="token punctuation">.</span><span class="token function">readTemperature</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token keyword">float</span> humidity <span class="token operator">=</span> dht<span class="token punctuation">.</span><span class="token function">readHumidity</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token operator">!</span><span class="token function">isnan</span><span class="token punctuation">(</span>temperature<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">beginMessage</span><span class="token punctuation">(</span>tempTopic<span class="token punctuation">)</span><span class="token punctuation">;</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span>temperature<span class="token punctuation">)</span><span class="token punctuation">;</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">endMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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Serial<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"Temperature: "</span> <span class="token operator">+</span> <span class="token function">String</span><span class="token punctuation">(</span>temperature<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token operator">!</span><span class="token function">isnan</span><span class="token punctuation">(</span>humidity<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">beginMessage</span><span class="token punctuation">(</span>humidTopic<span class="token punctuation">)</span><span class="token punctuation">;</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">print</span><span class="token punctuation">(</span>humidity<span class="token punctuation">)</span><span class="token punctuation">;</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">endMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
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Serial<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"Humidity: "</span> <span class="token operator">+</span> <span class="token function">String</span><span class="token punctuation">(</span>humidity<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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<span class="token punctuation">}</span>
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<span class="token keyword">void</span> <span class="token function">reconnectMQTT</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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Serial<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"Reconnecting to MQTT..."</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token keyword">if</span> <span class="token punctuation">(</span>mqttClient<span class="token punctuation">.</span><span class="token function">connect</span><span class="token punctuation">(</span>broker<span class="token punctuation">,</span> port<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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Serial<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"Reconnected!"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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mqttClient<span class="token punctuation">.</span><span class="token function">subscribe</span><span class="token punctuation">(</span><span class="token string">"esp32/control/interval"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span> <span class="token keyword">else</span> <span class="token punctuation">{</span>
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Serial<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">"Reconnect failed!"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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<span class="token punctuation">}</span></pre><svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 12 12" fill="none" class="_9bc997d _33882ae"><path d="M-5.24537e-07 0C-2.34843e-07 6.62742 5.37258 12 12 12L0 12L-5.24537e-07 0Z" fill="currentColor"></path></svg><svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 12 12" fill="none" class="_9bc997d _28d7e84"><path d="M-5.24537e-07 0C-2.34843e-07 6.62742 5.37258 12 12 12L0 12L-5.24537e-07 0Z" fill="currentColor"></path></svg></div><h2><span>5. 重要函数说明</span></h2><ul><li><p class="ds-markdown-paragraph"><code>connect(broker, port)</code><span> - 连接MQTT代理</span></p></li><li><p class="ds-markdown-paragraph"><code>subscribe(topic)</code><span> - 订阅主题</span></p></li><li><p class="ds-markdown-paragraph"><code>beginMessage(topic)</code><span> - 开始发布消息</span></p></li><li><p class="ds-markdown-paragraph"><code>endMessage()</code><span> - 结束发布消息</span></p></li><li><p class="ds-markdown-paragraph"><code>parseMessage()</code><span> - 解析接收的消息</span></p></li><li><p class="ds-markdown-paragraph"><code>poll()</code><span> - 处理MQTT通信</span></p></li><li><p class="ds-markdown-paragraph"><code>setId(clientId)</code><span> - 设置客户端ID</span></p></li><li><p class="ds-markdown-paragraph"><code>setUsernamePassword(username, password)</code><span> - 设置认证信息</span></p></li></ul><h2><span>6. 注意事项</span></h2><ol start="1"><li><p class="ds-markdown-paragraph"><span>确保WiFi连接稳定</span></p></li><li><p class="ds-markdown-paragraph"><span>定期检查MQTT连接状态</span></p></li><li><p class="ds-markdown-paragraph"><span>合理设置消息发布频率</span></p></li><li><p class="ds-markdown-paragraph"><span>使用合适的QoS等级</span></p></li><li><p class="ds-markdown-paragraph"><span>处理连接断开和重连逻辑</span></p></li></ol><p class="ds-markdown-paragraph"><span>这个库提供了完整的MQTT客户端功能，适合在ESP32上实现物联网应用。</span></p></div></div><div class="ds-theme" style="--ds-rgb-hover: 245 245 245; --ds-rgb-primary: 77 107 254; --ds-button-hover-color: #2563EB; --ds-bordered-secondary-button-color: var(--dsr-text-1); --ds-input-prefix-color: var(--dsr-text-1);"></div><div class="ds-flex _0a3d93b" style="align-items: center; gap: 10px;"><div class="ds-flex _965abe9 _54866f7" style="align-items: center; gap: 10px;"><div class="ds-icon-button db183363" tabindex="-1" role="button" aria-disabled="false" style="--hover-size: 28px; width: 28px; height: 28px;"><div class="ds-icon-button__hover-bg"></div><div class="ds-icon" style="font-size: 16px; width: 16px; height: 16px;"><svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M6.14926 4.02039C7.11194 4.02039 7.8798 4.02023 8.49594 4.07605C9.12125 4.13276 9.65789 4.25194 10.1414 4.53113C10.7201 4.86536 11.2008 5.34597 11.535 5.92468C11.8142 6.40824 11.9334 6.94488 11.9901 7.57019C12.0459 8.18631 12.0457 8.95426 12.0457 9.91687C12.0457 10.8795 12.0459 11.6474 11.9901 12.2635C11.9334 12.8889 11.8142 13.4255 11.535 13.9091C11.2008 14.4877 10.7201 14.9684 10.1414 15.3026C9.65789 15.5818 9.12125 15.701 8.49594 15.7577C7.87981 15.8135 7.11193 15.8134 6.14926 15.8134C5.18664 15.8134 4.41871 15.8135 3.80258 15.7577C3.17727 15.701 2.64063 15.5818 2.15707 15.3026C1.57837 14.9684 1.09775 14.4877 0.763519 13.9091C0.484335 13.4255 0.365153 12.8889 0.308441 12.2635C0.252618 11.6474 0.252777 10.8795 0.252777 9.91687C0.252777 8.95425 0.252634 8.18632 0.308441 7.57019C0.365153 6.94488 0.484335 6.40824 0.763519 5.92468C1.09774 5.34596 1.57836 4.86535 2.15707 4.53113C2.64063 4.25194 3.17727 4.13276 3.80258 4.07605C4.41871 4.02024 5.18663 4.02039 6.14926 4.02039ZM6.14926 5.37781C5.16178 5.37781 4.46631 5.37768 3.92563 5.42664C3.39431 5.47479 3.07856 5.5658 2.83578 5.70593C2.46317 5.92112 2.15351 6.23077 1.93832 6.60339C1.7982 6.84617 1.70718 7.16192 1.65903 7.69324C1.61007 8.23391 1.6102 8.9294 1.6102 9.91687C1.6102 10.9044 1
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</div></div><div class="ec4f5d61"><button role="button" aria-disabled="false" class="ds-atom-button f79352dc ds-toggle-button ds-toggle-button--md" tabindex="0" style="transform: translateZ(0px);"><div class="ds-icon ds-atom-button__icon" style="font-size: 14px; width: 14px; height: 14px; color: var(--dsw-alias-label-primary); margin-right: 0px;"><svg width="14" height="14" viewBox="0 0 14 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path d="M7.06431 5.93342C7.68763 5.93342 8.19307 6.43904 8.19322 7.06233C8.19322 7.68573 7.68772 8.19123 7.06431 8.19123C6.44099 8.19113 5.9354 7.68567 5.9354 7.06233C5.93555 6.43911 6.44108 5.93353 7.06431 5.93342Z" fill="currentColor"></path><path fill-rule="evenodd" clip-rule="evenodd" d="M8.6815 0.963693C10.1169 0.447019 11.6266 0.374829 12.5633 1.31135C13.5 2.24805 13.4277 3.75776 12.911 5.19319C12.7126 5.74431 12.4386 6.31796 12.0965 6.89729C12.4969 7.54638 12.8141 8.19018 13.036 8.80647C13.5527 10.2419 13.6251 11.7516 12.6883 12.6883C11.7516 13.625 10.242 13.5527 8.8065 13.036C8.19022 12.8141 7.54641 12.4969 6.89732 12.0965C6.31797 12.4386 5.74435 12.7125 5.19322 12.911C3.75777 13.4276 2.2481 13.5 1.31138 12.5633C0.374859 11.6266 0.447049 10.1168 0.963724 8.68147C1.17185 8.10338 1.46321 7.50063 1.82896 6.8924C1.52182 6.35711 1.27235 5.82825 1.08872 5.31819C0.572068 3.88278 0.499714 2.37306 1.43638 1.43635C2.37308 0.499655 3.8828 0.572044 5.31822 1.08869C5.82828 1.27232 6.35715 1.5218 6.89243 1.82893C7.50066 1.46318 8.10341 1.17181 8.6815 0.963693ZM11.3573 8.01154C10.9083 8.62253 10.3901 9.22873 9.80943 9.8094C9.22877 10.3901 8.62255 10.9083 8.01158 11.3572C8.4257 11.5841 8.8287 11.7688 9.21275 11.9071C10.5456 12.3868 11.4246 12.2547 11.8397 11.8397C12.2548 11.4246 12.3869 10.5456 11.9071 9.21272C11.7688 8.82866 11.5841 8.42568 11.3573 8.01154ZM2.56529 8.02912C2.37344 8.39322 2.21495 8.74796 2.09263 9.08772C1.61291 10.4204 1.74512 11.2995 2.16001 11.7147C2.57505 12.1297 3.45415 12.2618 4.78697 11.7821C5.11057 11.6656 5.44786 11.5164 5.7938 11.3367C5.249 10.9223 4.70922 10.4533 4.19029 9.9344C3.57578 9.31987 3.03169 8.67633 2.56529 8.02912ZM6.90708 3.2469C6.24065 3.70479 5.5646 4.26321 4.91392 4.91389C4.26325 5.56456 3.70482 6.24063 3.24693 6.90705C3.72674 7.63325 4.32777 8.37459 5.03892 9.08576C5.64943 9.69627 6.28183 10.2265 6.90806 10.6678C7.59368 10.2025 8.2908 9.63076 8.96079 8.96076C9.6308 8.29075 10.2025 7.59366 10.6678 6.90803C10.2265 6.2818 9.69631 5.6494 9.08579 5.03889C8.37462 4.32773 7.63328 3.72672 6.90708 3.2469ZM11.7147 2.15998C11.2996 1.74509 10.4204 1.61288 9.08775 2.0926C8.74835 2.21479 8.39382 2.37271 8.03013 2.56428C8.67728 3.03065 9.31995 3.5758 9.93443 4.19026C10.4534 4.7092 10.9223 5.24896 11.3368 5.79377C11.5164 5.44785 11.6656 5.11052 11.7821 4.78694C12.2618 3.45416 12.1297 2.57502 11.7147 2.15998ZM4.91197 2.2176C3.57922 1.73788 2.70004 1.86995 2.28501 2.28498C1.87001 2.70003 1.73791 3.5792 2.21763 4.91194C2.31709 5.18822 2.44112 5.47427 2.58677 5.7674C3.01931 5.1887 3.51474 4.6158 4.06529 4.06526C4.61584 3.5147 5.18872 3.01928 5.76743 2.58674C5.47431 2.4411 5.18824 2.31706 4.91197 2.2176Z" fill="currentColor"></path></svg></div><span class=""><span class="_6dbc175">深度思考</span></span></button><button role="button" aria-disabled="false" class="ds-atom-button f79352dc ds-toggle-button ds-toggle-button--md" tabindex="0" style="transform: translateZ(0px);"><div class="ds-icon ds-atom-button__icon" style="font-size: 14px; width: 14px; height: 14px; color: var(--dsw-alias-label-primary); margin-right: 0px;"><svg width="14" height="14" viewBox="0 0 14 14" fill="none" xmlns="http://www.w3.org/2000/svg"><path fill-rule="evenodd" clip-rule="evenodd" d="M7.00003 0.150391C10.7832 0.150391 13.8496 3.21685 13.8496 7C13.8496 10.7832 10.7832 13.8496 7.00003 13.8496C3.21688 13.8496 0.150421 10.7832 0.150421 7C0.150421 3.21685 3.21688 0.150391 7.00003 0.150391ZM5.37796 7.59961C5.4267 9.03204 5.64754 10.2965 5.97366 11.2197C6.15996 11.7471 6.36946 12.1301 6.57327 12.3701C6.77751 12.6105 6.92343 12.6504 7.00003 12.6504C7.07663 12.6504 7.22255 12.6105 7.42679 12.3701
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@keyframes intercom-lightweight-app-launcher {
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from {
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opacity: 0;
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transform: scale(0.5);
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to {
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opacity: 1;
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transform: scale(1);
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}
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}
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@keyframes intercom-lightweight-app-gradient {
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from {
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opacity: 0;
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to {
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opacity: 1;
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}
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}
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@keyframes intercom-lightweight-app-messenger {
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0% {
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opacity: 0;
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transform: scale(0);
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}
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40% {
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opacity: 1;
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}
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100% {
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transform: scale(1);
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}
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}
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.intercom-lightweight-app {
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position: fixed;
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z-index: 2147483001;
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width: 0;
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height: 0;
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font-family: system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
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}
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.intercom-lightweight-app-gradient {
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position: fixed;
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z-index: 2147483002;
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width: 500px;
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height: 500px;
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bottom: 0;
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right: 0;
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pointer-events: none;
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background: radial-gradient(
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ellipse at bottom right,
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rgba(29, 39, 54, 0.16) 0%,
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rgba(29, 39, 54, 0) 72%);
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animation: intercom-lightweight-app-gradient 200ms ease-out;
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}
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.intercom-lightweight-app-launcher {
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position: fixed;
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z-index: 2147483003;
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padding: 0 !important;
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margin: 0 !important;
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border: none;
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bottom: 20px;
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right: 20px;
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max-width: 48px;
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width: 48px;
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max-height: 48px;
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height: 48px;
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border-radius: 50%;
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background: #0f0f0f;
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cursor: pointer;
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box-shadow: 0 1px 6px 0 rgba(0, 0, 0, 0.06), 0 2px 32px 0 rgba(0, 0, 0, 0.16);
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transition: transform 167ms cubic-bezier(0.33, 0.00, 0.00, 1.00);
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box-sizing: content-box;
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}
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.intercom-lightweight-app-launcher:hover {
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transition: transform 250ms cubic-bezier(0.33, 0.00, 0.00, 1.00);
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transform: scale(1.1)
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}
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.intercom-lightweight-app-launcher:active {
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transform: scale(0.85);
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transition: transform 134ms cubic-bezier(0.45, 0, 0.2, 1);
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}
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.intercom-lightweight-app-launcher:focus {
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outline: none;
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}
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.intercom-lightweight-app-launcher-icon {
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display: flex;
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align-items: center;
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justify-content: center;
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position: absolute;
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top: 0;
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left: 0;
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width: 48px;
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height: 48px;
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transition: transform 100ms linear, opacity 80ms linear;
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}
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.intercom-lightweight-app-launcher-icon-open {
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opacity: 1;
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transform: rotate(0deg) scale(1);
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}
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.intercom-lightweight-app-launcher-icon-open svg {
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width: 24px;
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height: 24px;
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}
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.intercom-lightweight-app-launcher-icon-open svg path {
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fill: rgb(255, 255, 255);
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}
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.intercom-lightweight-app-launcher-icon-self-serve {
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opacity: 1;
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transform: rotate(0deg) scale(1);
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}
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.intercom-lightweight-app-launcher-icon-self-serve svg {
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height: 44px;
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}
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.intercom-lightweight-app-launcher-icon-self-serve svg path {
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fill: rgb(255, 255, 255);
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}
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.intercom-lightweight-app-launcher-custom-icon-open {
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max-height: 24px;
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max-width: 24px;
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opacity: 1;
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transform: rotate(0deg) scale(1);
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}
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.intercom-lightweight-app-launcher-icon-minimize {
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opacity: 0;
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transform: rotate(-60deg) scale(0);
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}
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.intercom-lightweight-app-launcher-icon-minimize svg path {
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fill: rgb(255, 255, 255);
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}
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/* Extended launcher styles */
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.intercom-lightweight-app-launcher.intercom-launcher-extended {
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width: calc(180px - 30px);
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max-width: calc(180px - 30px);
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height: calc(45px - 26px);
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max-height: calc(45px - 26px);
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border-radius: 12px;
|
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|
display: flex;
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align-items: center;
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justify-content: flex-start;
|
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padding: 12px 16px 12px 12px !important;
|
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|
gap: 6px;
|
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|
|
/* Use theme background instead of hardcoded gradient */
|
|
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|
|
background: #0f0f0f;
|
|
|
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|
|
border: 1px solid rgba(255, 255, 255, 0.15);
|
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|
|
box-shadow: 0px -2px 50px rgba(0, 0, 0, 0.1);
|
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}
|
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|
.intercom-lightweight-app-launcher.intercom-launcher-extended .intercom-lightweight-app-launcher-icon {
|
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|
|
position: relative;
|
|
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|
|
width: 24px;
|
|
|
|
|
|
height: 24px;
|
|
|
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|
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}
|
|
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|
|
|
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|
.intercom-lightweight-app-launcher-text {
|
|
|
|
|
|
/* Match text color with launcher icon */
|
|
|
|
|
|
color: rgb(255, 255, 255);
|
|
|
|
|
|
font-size: 14px;
|
|
|
|
|
|
font-weight: 600;
|
|
|
|
|
|
line-height: 1.5;
|
|
|
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|
|
white-space: nowrap;
|
|
|
|
|
|
overflow: hidden;
|
|
|
|
|
|
text-overflow: ellipsis;
|
|
|
|
|
|
max-width: 140px;
|
|
|
|
|
|
opacity: 1;
|
|
|
|
|
|
transition: opacity 80ms linear;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
.intercom-lightweight-app-messenger {
|
|
|
|
|
|
position: fixed;
|
|
|
|
|
|
z-index: 2147483003;
|
|
|
|
|
|
overflow: hidden;
|
|
|
|
|
|
background-color: #ffffff;
|
|
|
|
|
|
animation: intercom-lightweight-app-messenger 250ms cubic-bezier(0, 1, 1, 1);
|
|
|
|
|
|
transform-origin: bottom right;
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
width: 400px;
|
|
|
|
|
|
height: calc(100% - 40px);
|
|
|
|
|
|
max-height: 704px;
|
|
|
|
|
|
min-height: 250px;
|
|
|
|
|
|
right: 20px;
|
|
|
|
|
|
bottom: 20px;
|
|
|
|
|
|
box-shadow: 0 5px 40px rgba(0,0,0,0.16);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
border-radius: 16px;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
.intercom-lightweight-app-messenger-header {
|
|
|
|
|
|
height: 64px;
|
|
|
|
|
|
border-bottom: none;
|
|
|
|
|
|
background: #ffffff;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
.intercom-lightweight-app-messenger-footer{
|
|
|
|
|
|
position:absolute;
|
|
|
|
|
|
bottom:0;
|
|
|
|
|
|
width: 100%;
|
|
|
|
|
|
height: 80px;
|
|
|
|
|
|
background: #ffffff;
|
|
|
|
|
|
font-size: 14px;
|
|
|
|
|
|
line-height: 21px;
|
|
|
|
|
|
border-top: 1px solid rgba(0, 0, 0, 0.05);
|
|
|
|
|
|
box-shadow: 0px 0px 25px rgba(0, 0, 0, 0.05);
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
@media print {
|
|
|
|
|
|
.intercom-lightweight-app {
|
|
|
|
|
|
display: none;
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
</style></div><div class="ds-floating-container" style="z-index: 0;"><div class="ds-floating-position-wrapper ds-theme" data-transform-origin="top" style="--ds-rgb-hover: 0 0 0 / 4%; z-index: 0; max-width: 50%; left: 18.6095px; top: 267px;"></div></div><div class="ds-theme ds-modal-wrapper ds-modal-wrapper--hide" data-transform-origin="center" style="--ds-rgb-hover: 245 245 245; --ds-rgb-primary: 77 107 254; --ds-button-hover-color: #2563EB; --ds-bordered-secondary-button-color: var(--dsr-text-1); --ds-input-prefix-color: var(--dsr-text-1); z-index: 0;"></div><div class="ds-floating-container" style="z-index: 0;"><div class="ds-floating-position-wrapper ds-theme" data-transform-origin="bottom" style="--ds-rgb-hover: 0 0 0 / 4%; z-index: 0; left: 673.5px; top: 827px;"></div></div><div class="ds-floating-container" style="z-index: 0;"><div class="ds-floating-position-wrapper ds-theme" data-transform-origin="bottom" style="--ds-rgb-hover: 0 0 0 / 4%; z-index: 0; left: 821.5px; top: 827px;"></div></div><div class="ds-floating-container" style="z-index: 0;"><div class="ds-floating-position-wrapper ds-theme" data-transform-origin="bottom" style="--ds-rgb-hover: 0 0 0 / 4%; z-index: 0; left: 1263.05px; top: 809px;"></div></div><div class="ds-floating-container" style="z-index: 0;"><div class="ds-floating-position-wrapper ds-theme" data-transform-origin="top" style="--ds-rgb-hover: 0 0 0 / 4%; z-index: 0; left: 1860px; top: 53px;"></div></div></body></html>
|
