1

我有以下问题：
我想在 Adafruit Huzzah ESP6288 上创建一个 MQTT 客户端，并将 MAC 地址设置为 clientID。

这是我的代码：

#include <ESP8266WiFi.h>
#include "Adafruit_MQTT.h"
#include "Adafruit_MQTT_Client.h"

#define WLAN_SSID       "Jupiter"
#define WLAN_PASS       "wilano123"
#define SERVER      "192.168.178.134"
#define CLIENTID      "abcde123456789"
#define SERVERPORT  1883          

WiFiClient client;
void MQTT_connect();
Adafruit_MQTT_Client mqtt;

void setup() {
  Serial.begin(115200);
  delay(10);


  Serial.print("Connecting to ");
  Serial.println(WLAN_SSID);

  WiFi.mode(WIFI_STA);
  WiFi.begin(WLAN_SSID, WLAN_PASS);
  while (WiFi.status() != WL_CONNECTED) {
     delay(500);
     Serial.print(".");
  }
  Serial.println();

  Serial.println("WiFi connected");
  Serial.println("IP address: "); Serial.println(WiFi.localIP());

  String mac = WiFi.macAddress(); 
  int length = mac.length() + 1;
  char macArray[length];
  mac.toCharArray(macArray, length);
  mqtt = Adafruit_MQTT_Client(&client, SERVER, SERVERPORT, macArray, "root", "pass");
}

void loop() {
    MQTT_connect();
    sendTemperature(12.5, "Werkstatt");
    String s = WiFi.macAddress();
    Serial.println(s);
    delay(5000);
}

void sendTemperature(double temperature, String sensorID) {
    .....
    mqtt.publish("ds18b20",char_array,0);
}

void MQTT_connect() {
    int8_t ret;

    if (mqtt.connected()) {
      return;
    }

    Serial.print("Connecting to MQTT... ");
    uint8_t retries = 3;
    while ((ret = mqtt.connect()) != 0) { // connect will return 0 for connected
       Serial.println(mqtt.connectErrorString(ret));
       Serial.println("Retrying MQTT connection in 5 seconds...");
       mqtt.disconnect();
       delay(5000);  // wait 5 seconds
       retries--;
       if (retries == 0) {
          while (1);
       }
   }
   Serial.println("MQTT Connected!");
}

我是 C 新手，我认为不可能初始化Adafruit_MQTT_Client mqtt变量并将其设置在设置循环中。
希望有人可以提供帮助，所以我可以Adafruit_MQTT_Client使用 MAC 地址作为 clientID 创建一个。

4

0 回答 0