esp32 mqtt 局域网 通信 测试通过

#include <WiFi.h>
#include <stdlib.h>
#include "WiFiClientSecure.h"
#include "Adafruit_MQTT.h"
#include "Adafruit_MQTT_Client.h"
#include <ArduinoJson.h>

#define WLAN_SSID "AMmakeF2"
#define WLAN_PASS "AMmake001"
//#define WLAN_SSID "AMmake F1"
//#define WLAN_PASS "AMmake11"
#define MQTT_SERVER      "192.168.2.44"
#define MQTT_PORT  1883
#define MQTT_USERNAME ""
#define MQTT_PASSWORD ""



WiFiClient esp32Client;
Adafruit_MQTT_Client mqtt_client(&esp32Client, MQTT_SERVER, MQTT_PORT, MQTT_USERNAME, MQTT_PASSWORD);
Adafruit_MQTT_Publish Publish_laser_state = Adafruit_MQTT_Publish(&mqtt_client, "AM/laser_0/state");
Adafruit_MQTT_Subscribe Subscribe_laser_ctl(&mqtt_client, "AM/laser/ctl");

StaticJsonDocument<200> doc;




void setup() {
  Serial.begin(115200);
  delay(10);
  Serial.println(F("This esp gonna "));
  Serial.print("Connecting to ");
  Serial.println(WLAN_SSID);
  delay(500);
  WiFi.begin(WLAN_SSID, WLAN_PASS);
  delay(500);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println();
  Serial.println("WiFi connected !");
  Serial.println("IP address: "); Serial.println(WiFi.localIP());

  mqtt_client.subscribe(&Subscribe_laser_ctl);

}

void loop() {
  //    mqtt_client.processPackets(10);
  mqtt_client.ping();

  char laser_state_sw[10] = "laser_on";

  MQTT_connect();

  if (! Publish_laser_state.publish(laser_state_sw)) {
    Serial.println(F("Failed"));
  } else {
    Serial.println(F("mqtt work OK!"));
  }


  // 检查是否有新的订阅消息
  Adafruit_MQTT_Subscribe *subscription;
  while ((subscription = mqtt_client.readSubscription(100))) {
    if (subscription == &Subscribe_laser_ctl) {
      // 获取最新的订阅消息
      char message[100];
      strcpy(message, (char *)Subscribe_laser_ctl.lastread);

      // 处理接收到的消息
      Serial.print("Received message: ");
      Serial.println(message);

      deserializeJson(doc, message);

      int laser0 = doc["laser0"];
      int laser1 = doc["laser1"];
      int laser2 = doc["laser2"];
      int laser3 = doc["laser3"];
      int laser4 = doc["laser4"];
      int laser5 = doc["laser5"];

      Serial.print("laser0: ");
      Serial.println(laser0);
      Serial.print("laser1: ");
      Serial.println(laser1);
      Serial.print("laser2: ");
      Serial.println(laser2);
      Serial.print("laser3: ");
      Serial.println(laser3);
      Serial.print("laser4: ");
      Serial.println(laser4);
      Serial.print("laser5: ");
      Serial.println(laser5);


    }
  }


  //    delay(1000);

}

void MQTT_connect() {
  int8_t ret;
  if (mqtt_client.connected()) {
    return;
  }
  Serial.print("Connecting to MQTT... ");
  uint8_t retries = 3;
  while ((ret = mqtt_client.connect()) != 0) {
    Serial.println(mqtt_client.connectErrorString(ret));
    Serial.println("Retrying MQTT connection in 5 seconds...");
    mqtt_client.disconnect();
    delay(5000);
    retries--;
    if (retries == 0) {
      ESP.restart();
    }
  }

  Serial.println("MQTT Connected!");
}

注意打开专用网络

在线测试界面：链接  MQTT X Web