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添加ArduinoMqttClient库的使用

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hwf453 1 month ago
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wifi-mqtt-esp32-ArduinoMqttClient-dht11/wifi-mqtt-esp32-ArduinoMqttClient-dht11/wifi-mqtt-esp32-ArduinoMqttClient-dht11.ino
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//安装ArduinoMqttClient库
//安装ArduinoJson库
//安装DHT11库 DHT sensor library
#include <WiFi.h>
#include <ArduinoMqttClient.h>
#include <DHT.h>
#include <ArduinoJson.h>
#define DHT_PIN 15
#define DHT_TYPE DHT11
DHT dht(DHT_PIN, DHT_TYPE);
// WiFi 配置
const char* ssid = "rehome";
const char* password = "Ruihong123";
// MQTT 配置
const char* mqtt_server = "47.242.184.139"; // hk服务器
const int mqtt_port = 1883;
const char* mqtt_user = "admin"; // 如果需要认证
const char* mqtt_password = "publish452131wW452131wW$";
WiFiClient wifiClient;
MqttClient mqttClient(wifiClient);
const char topic[] = "esp32/status";
unsigned long lastSensorRead = 0;
const long sensorInterval = 10000; // 10秒
void setup_wifi() {
delay(10);
Serial.println();
Serial.print("正在连接: ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi 连接成功");
Serial.print("IP 地址: ");
Serial.println(WiFi.localIP());
}
void reconnect() {
while (!mqttClient.connected()) {
Serial.println("尝试 MQTT 连接...");
// 设置认证帐号和密码
mqttClient.setUsernamePassword(mqtt_user, mqtt_password);
// 客户端 ID
mqttClient.setId("ArduinoMqttClient_dht11_" + String(random(0xffff), HEX));
// 尝试连接
if(mqttClient.connect(mqtt_server, mqtt_port)) {
Serial.println("MQTT连接成功");
// 订阅主题
// Subscribe to topic
//mqttClient.subscribe(topic);
//Subscribe with QoS
mqttClient.subscribe(topic, 0); // QoS 0 - 最多一次 QoS 1 - 至少一次 QoS 2 - 恰好一次
} else {
Serial.print("MQTT连接失败，错误代码: ");
Serial.println(" 5秒后重试...");
delay(5000);
}
}
}
void publishSensorData(float temperature,float humidity) {
StaticJsonDocument<200> doc;
doc["device"] = "ESP32_002";
doc["temperature"] = String(temperature);
doc["humidity"] = String(humidity);
doc["timestamp"] = millis();
// Serialize and publish
mqttClient.beginMessage(topic, false, 0);// true表示保留消息 QoS 0 - 最多一次 QoS 1 - 至少一次 QoS 2 - 恰好一次
serializeJson(doc, mqttClient);
mqttClient.endMessage();
}
void onMessage(int messageSize) {
Serial.println("Message received: ");
String topic = mqttClient.messageTopic();
String message = "";
while (mqttClient.available()) {
message += (char)mqttClient.read();
}
Serial.print("Message on '");
Serial.print(topic);
Serial.print("': ");
Serial.println(message);
Serial.println();
}
void readAndPublishSensorData() {
float temperature = dht.readTemperature();
float humidity = dht.readHumidity();
if (!isnan(temperature) && !isnan(humidity)) {
char tempStr[8];
char humStr[8];
dtostrf(temperature, 6, 2, tempStr);
dtostrf(humidity, 6, 2, humStr);
Serial.printf("传感器数据已发布: 温度=%s°C, 湿度=%s%%\n", tempStr, humStr);
//发布json格式温湿度数据
publishSensorData(temperature,humidity);
}
}
void setup() {
Serial.begin(115200);
setup_wifi();
// 设置MQTT
// Connect with will message
// mqttClient.beginWill("arduino/status", 1, true, 1);
// mqttClient.endWill();
// Set callback
mqttClient.onMessage(onMessage);
}
void loop() {
if(WiFi.status() != WL_CONNECTED){
setup_wifi();
}
if (!mqttClient.connected()) {
reconnect();
}
mqttClient.poll();
// 定期读取传感器数据
if (millis() - lastSensorRead > sensorInterval) {
Serial.println("定期读取传感器数据");
lastSensorRead = millis();
readAndPublishSensorData();
Serial.println("mqtt消息已发布。");
}
}

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wifi-mqtt-esp32-ArduinoMqttClient/wifi-mqtt-esp32-ArduinoMqttClient/wifi-mqtt-esp32-ArduinoMqttClient.ino
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//安装ArduinoMqttClient库
#include <WiFi.h>
#include <ArduinoMqttClient.h>
#include <ArduinoJson.h>
// WiFi 配置
const char* ssid = "rehome";
const char* password = "Ruihong123";
// MQTT 配置
const char* mqtt_server = "47.242.184.139"; // hk服务器
const int mqtt_port = 1883;
const char* mqtt_user = "admin"; // 如果需要认证
const char* mqtt_password = "publish452131wW452131wW$";
WiFiClient wifiClient;
MqttClient mqttClient(wifiClient);
const char topic[] = "esp32/status32";
void setup_wifi() {
delay(10);
Serial.println();
Serial.print("正在连接: ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi 连接成功");
Serial.print("IP 地址: ");
Serial.println(WiFi.localIP());
}
void reconnect() {
while (!mqttClient.connected()) {
Serial.println("尝试 MQTT 连接...");
// 设置认证帐号和密码
mqttClient.setUsernamePassword(mqtt_user, mqtt_password);
// 客户端 ID
mqttClient.setId("ArduinoMqttClient_" + String(random(0xffff), HEX));
// 尝试连接
if(mqttClient.connect(mqtt_server, mqtt_port)) {
Serial.println("MQTT连接成功");
// 订阅主题
// Subscribe to topic
//mqttClient.subscribe(topic);
//Subscribe with QoS
mqttClient.subscribe(topic, 0); // QoS 0 - 最多一次 QoS 1 - 至少一次 QoS 2 - 恰好一次
} else {
Serial.print("MQTT连接失败，错误代码: ");
Serial.println(" 5秒后重试...");
delay(5000);
}
}
}
void publishSensorData() {
float temperature = 25.3;
float humidity = 82.5;
// Create JSON document
StaticJsonDocument<200> doc;
doc["temperature"] = temperature;
doc["humidity"] = humidity;
doc["timestamp"] = millis();
// Serialize and publish
mqttClient.beginMessage(topic, false, 0);// true表示保留消息 QoS 0 - 最多一次 QoS 1 - 至少一次 QoS 2 - 恰好一次
serializeJson(doc, mqttClient);
mqttClient.endMessage();
}
void onMessage(int messageSize) {
Serial.println("Message received: ");
String topic = mqttClient.messageTopic();
String message = "";
while (mqttClient.available()) {
message += (char)mqttClient.read();
}
Serial.print("Message on '");
Serial.print(topic);
Serial.print("': ");
Serial.println(message);
Serial.println();
}
void setup() {
Serial.begin(115200);
setup_wifi();
// 设置MQTT
// Connect with will message
// mqttClient.beginWill("arduino/status", 1, true, 1);
// mqttClient.endWill();
// Set callback
mqttClient.onMessage(onMessage);
}
void loop() {
if(WiFi.status() != WL_CONNECTED){
setup_wifi();
}
if (!mqttClient.connected()) {
reconnect();
}
// 发布消息示例
static unsigned long lastMsg = 0;
if (millis() - lastMsg > 5000) {
lastMsg = millis();
String message = "Hello from ESP32 - " + String(millis());
//client.publish("esp32/status", message.c_str());
// Simple publish
// mqttClient.beginMessage(topic, false, 1); // true表示保留消息 QoS 0 - 最多一次 QoS 1 - 至少一次 QoS 2 - 恰好一次
// mqttClient.print(message);
// mqttClient.endMessage();
// With QoS and retention
// mqttClient.beginMessage(topic, false, 1); // true表示保留消息 QoS 0 - 最多一次 QoS 1 - 至少一次 QoS 2 - 恰好一次
// mqttClient.print(message);
// mqttClient.endMessage();
publishSensorData();
Serial.println("消息已发布。");
//Serial.println("消息已发布: " + message);
}
mqttClient.poll();
}

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wifi-mqtt-esp32-PubSubClient-dht11/wifi-mqtt-esp32-PubSubClient-dht11/wifi-mqtt-esp32-PubSubClient-dht11.ino
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//安装PubSubClient库 //安装PubSubClient库
//安装ArduinoJson库 //安装ArduinoJson库
//安装DHT11库 DHT sensor library
#include <WiFi.h> #include <WiFi.h>
#include <PubSubClient.h> #include <PubSubClient.h>

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//安装PubSubClient库
#include <WiFi.h> #include <WiFi.h>
#include <PubSubClient.h> #include <PubSubClient.h>

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