ESP32 MQTT两次发布相同的消息，而不是两条不同的消息到不同主题

Question

我正在尝试通过MQTT从ESP32发送数据到我的计算机。我有两组不同的数据集，该数据是两个主题，即温度和重力。由于某种原因，它只会发布一条消息，但将其发送给经纪人两次，并首先发布任何消息。我不确定我会做些什么。

Arduino代码：

int parseTilt(String DevData) {
  String DevUUID, DevColour, DevTempData, DevGravityData;
  int colourInt;
  float DevTemp, DevGravity;

  // Determine the Colour
  colourInt = DevData.substring(6, 7).toInt();

  switch (colourInt) {
    case 1:
      DevColour = "Red";
      break;
    case 2:
      DevColour = "Green";
      break;
    case 3:
      DevColour = "Black";
      break;
    case 4:
      DevColour = "Purple";
      break;
    case 5:
      DevColour = "Orange";
      break;
    case 6:
      DevColour = "Blue";
      break;
    case 7:
      DevColour = "Yellow";
      break;
    case 8:
      DevColour = "Pink";
      break;
  }

  if (repeatColour != 0 && repeatColour != colourInt) {
    Serial.print(DevColour);
    Serial.println(" Tilt is being ignored.");
    return 0;
  }

  //Generate the UUID
  DevUUID += DevData.substring(0, 8);
  DevUUID += "-";
  DevUUID += DevData.substring(8, 12);
  DevUUID += "-";
  DevUUID += DevData.substring(12, 16);
  DevUUID += "-";
  DevUUID += DevData.substring(16, 20);
  DevUUID += "-";
  DevUUID += DevData.substring(20, 32);


  // Get the temperature
  DevTempData = DevData.substring(32, 36);
  DevTemp = strtol(DevTempData.c_str(), NULL, 16); // Temp in Freedumb units

  // Get the gravity
  DevGravityData = DevData.substring(36, 40);
  DevGravity = strtol(DevGravityData.c_str() , NULL, 16);

  Serial.println("--------------------------------");
  Serial.print("Colour: ");
  Serial.println(DevColour);
  Serial.print("Temp: ");
  if (Celsius) {
     Serial.print((DevTemp-32.0) * (5.0/9.0));
     Serial.println(" C");
  }
  else {
    Serial.print(DevTemp);
    Serial.println(" F");
  }
  Serial.print("Gravity: ");
  float DevGravityFormatted = (DevGravity / 1000);
  Serial.println(DevGravityFormatted);
  Serial.println(DevGravityFormatted, 3);
  Serial.println(DevGravityFormatted);
  Serial.println(DevData);
  Serial.println(DevData.substring(0,32));
  Serial.println(DevUUID);
  Serial.println("--------------------------------");


  client.loop();
  Serial.println(DevGravity, 16);
  char tempGravity[16];
  dtostrf(DevGravity, 16, 3, tempGravity);
  char tempTemp[5];
  dtostrf(DevTemp, 5, 2, tempTemp);
  Serial.println("tempGravity");
  Serial.println(tempGravity);
  Serial.println("tempTemp");
  Serial.println(tempTemp);
  client.publish("fermentation/temperature", tempTemp);
  client.loop();
  delay(500);
  client.publish("fermentation/gravity",tempGravity);
  client.loop();
  Serial.println("published");

  return 2;
}

以及我的计算机上的Python代码：

MQTT_SERVER = "192.168.1.69"
MQTT_PATH_1 = ('fermentation/gravity')
MQTT_PATH_2 = ('fermentation/temperature')


def on_connect(client, userdata, flags, rc):
    print('conncected, result: ' + str(rc))
    client.subscribe(MQTT_PATH_1)
    print('subscribed gravity')
    client.subscribe(MQTT_PATH_2)
    print('subscribed temperature')

def on_message(client, userdata, msg):
    temp = str(msg.payload).split("'")
    if msg.topic == MQTT_PATH_1:
        print('mqtt 1')
        print(msg.topic + ' ' + str(msg.payload))
    if msg.topic == MQTT_PATH_2:
        print('mqtt 2') 
        print(msg.topic + ' ' + str(msg.payload))
    else:
        print('else')
        print(msg.topic + ' ' + str(msg.payload))
    

client = mqtt.Client()
client.on_connect = on_connect
client.on_message = on_message
client.connect(MQTT_SERVER, 1883, 60)

client.loop_forever()

输出出现： MQTT 2 发酵/温度B'75.00' MQTT 2 发酵/温度B'75.00'

不确定我在做什么错。请原谅Arduino代码，我是菜鸟。它是根据此代码进行的：

感谢您的帮助！