esp8266的Arduino之MQTT客户端、Websocket客户端demo

一、参考连接

https://github.com/tuanpmt/ESP8266MQTTClient

二、食用方法

1、打开arduino，然后点击项目--加载库--添加.zip库，找到你下载的zip包，然后选中即可，这里需要更新为V1.0.4版本，在项目--加载库--管理库中，找到你刚刚安装的库，选择类型--已安装，目前下载安装的是V1.0.5版本，有点问题，需要安装V1.0.4版本的

2、解压刚刚的zip文件，找到examples里面的MQTTClient打开里面.ino文件，然后这里需要进行更改一下，添加wifi连接的部分代码，设置为你自己的Wifi，还有最下面的mqtt服务器的ip和port也要更改，参考代码如下：

//https://github.com/tuanpmt/ESP8266MQTTClient
#include <ESP8266MQTTClient.h>
#include <ESP8266WiFi.h>
MQTTClient mqtt;

void setup() {
  Serial.begin(115200);
  WiFi.mode(WIFI_STA);     //设置esp8266 工作模式
  WiFi.begin("WIFI", "PWD");
  WiFi.setAutoConnect(true);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  //topic, data, data is continuing
  mqtt.onData([](String topic, String data, bool cont) {
    Serial.printf("Data received, topic: %s, data: %s\r\n", topic.c_str(), data.c_str());
    //mqtt.unSubscribe("/qos0");
  });

  mqtt.onSubscribe([](int sub_id) {
    Serial.printf("Subscribe topic id: %d ok\r\n", sub_id);
    mqtt.publish("esp32", "GONEPOO", 0, 0);
  });

  mqtt.onConnect([]() {
    Serial.printf("\r\nMQTT: Connected\r\n");
    Serial.printf("Subscribe id: %d\r\n", mqtt.subscribe("esp32", 0));
    //mqtt.subscribe("esp32", 1);
    //mqtt.subscribe("esp32", 2);
  });

  mqtt.begin("mqtt://175.175.175.175:1883");
  //  mqtt.begin("mqtt://test.mosquitto.org:1883", {.lwtTopic = "hello", .lwtMsg = "offline", .lwtQos = 0, .lwtRetain = 0});
  //  mqtt.begin("mqtt://user:[email protected]:1883");
  //  mqtt.begin("mqtt://user:[email protected]:1883#clientId");
}

void loop() {
  mqtt.handle();
}

3、刷入程序后，在工具--串口监视器里面可以看到已经连上了mqtt服务器了，用paho订阅测试一下就好了，paho的下载地址如下http://www.eclipse.org/paho/components/tool/

4、同理，websocket客户端的代码也大同小异，只需要更改一下，刷入即可，需要更改的是下面的websocket的ip和端口号，参考代码如下：

//https://github.com/tuanpmt/ESP8266MQTTClient
#include <ESP8266MQTTClient.h>
#include <ESP8266WiFi.h>
MQTTClient mqtt;

void setup() {
  Serial.begin(115200);
  WiFi.mode(WIFI_STA);     //设置esp8266 工作模式
  WiFi.begin("WIFI", "PWD");
  WiFi.setAutoConnect(true);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  //topic, data, data is continuing
  mqtt.onData([](String topic, String data, bool cont) {
    Serial.printf("Data received, topic: %s, data: %s\r\n", topic.c_str(), data.c_str());
    //mqtt.unSubscribe("/qos0");
  });

  mqtt.onSubscribe([](int sub_id) {
    Serial.printf("Subscribe topic id: %d ok\r\n", sub_id);
    mqtt.publish("esp32", "gaojing", 0, 0);
  });
  mqtt.onConnect([]() {
    Serial.printf("\r\nMQTT: Connected\r\n");
    Serial.printf("Subscribe id: %d\r\n", mqtt.subscribe("esp32", 0));
    //mqtt.subscribe("esp8266", 1);
    //mqtt.subscribe("arduino", 2);
  });

  mqtt.begin("ws://175.175.175.175:9001");
  //mqtt.begin("ws://test.mosquitto.org:8080", {.lwtTopic = "hello", .lwtMsg = "offline", .lwtQos = 0, .lwtRetain = 0});
  //mqtt.begin("ws://user:[email protected]:8080");
  //mqtt.begin("ws://user:[email protected]:8080#clientId");
}

void loop() {
  mqtt.handle();
}

三、最后感言

我只是代码的搬运工，感谢那些分享代码的各位大神