[英]Not able to Receive subscribed Message with PubSubClient.h in Arduino WeMos D1 R32
[英]Not able to Receive subscribed Message with PubSubClient.h in Arduino Uno R3
#include "SPI.h"
#include “WiFiEsp.h”
#include <WiFiEspClient.h>
#include “SoftwareSerial.h”
#include <PubSubClient.h>
#include <WiFiEspUdp.h>
float temp=0;
int tempPin = 0;
int isClientConnected = 0;
char data[80];
char ssid[] = “SSID”; // your network SSID (name)
char pass[] = “PASSWORD”; // your network password
int status = WL_IDLE_STATUS; // the Wifi radio’s status
char deviceName = “ArduinoClient1”;
IPAddress server(xxx,xxx,xxx,xxx); //MQTT server IP
IPAddress ip(192,168,43,200);
void callback(char* topic, byte* payload, unsigned int length) {
Serial.print(“Message arrived [“);
Serial.print(topic);
Serial.print(“] “);
for (int i=0;i<length;i++) {
Serial.print((char)payload[i]);
}
Serial.println("-");
}
// Emulate Serial1 on pins 6/7 if not present
WiFiEspClient espClient;
PubSubClient client(espClient);
SoftwareSerial Serial1(6,7); // RX, TX
void setup(){
Serial.begin(9600);
Serial1.begin(9600);
WiFi.init(&Serial1);
WiFi.config(ip);
if (WiFi.status() == WL_NO_SHIELD) {
Serial.println("WiFi shield not present");
while (true);
}
while ( status != WL_CONNECTED) {
Serial.print("Attemptingonnect to WPA SSID: ");
Serial.println(ssid);
status = WiFi.begin(ssid, pass);
Serial.print("WiFius : ");
Serial.println(status);
}
//connect to MQTT server
client.setServer(server, 1883);
client.setCallback(callback);
isClientConnected = client.connect(deviceName);
Serial.println("+++++++");
Serial.print("isClientConnected;
Serial.println(isClientConnected);
Serial.print("client.state");
Serial.println(client.state());
if (isClientConnected) {
Serial.println("Connected…..");
client.publish("status","Welcome to ISG");
client.subscribe("isg/demoPublish/rpi/ardTempWarn");
//Not able to recieve for this subscribed topic on Arduino Uno Only if I
//print it returns 1
}
}
void loop() {
temp = (5.0 * analogRead(tempPin) * 100.0) / 1024;
Serial.print(" temp : " );
Serial.println(temp);
Serial.print("client.connected);
Serial.println(client.connected());
if (!client.connected()) {
reconnect();
}
client.publish("isg/demoPublish/ard1/tempLM35",String(temp).c_str());
// able to receive data at other
// clients like RPI,Web using Mosquitto broker
client.loop();
delay(5000);
}
void reconnect() {
Serial.println("Device is trying to connect to server ");
while (!client.connected()) {
if (client.connect(deviceName)) {
} else {
delay(5000);
}
}
}
我使用Arduino Uno R3和ESP8266-01作为wifi连接器。 我必须读取温度数据并发送到Mosquitto,MongoDB和Raspberry Pi并接收有关特定条件的数据,因为我已经在Arduino中订阅了一个主题。 我能够从Arduino接收所有其他客户的数据,但我无法接收Arduino中订阅主题的数据。 但像MongoDB这样的所有其他设备都能够从Raspberry Pi接收数据。 我使用了Arduino Uno R3,ESP8266-01设备和liberary用于连接和发送/接收数据WiFiEsp.h,WiFiEspClient.h,WiFiEspUdp.h,SoftwareSerial.h,PubSubClient.h client.subscribe(“topic”); 返回1还实现了回调函数但无法调用。
所以任何人都可以帮助我为什么我没有在Arduino中订阅主题消息?
你正在使用的库有回调错误,因此你最好使用其他库我的偏好是https://github.com/vshymanskyy/TinyGSM这个库包括几乎所有的SIM800变体(A,C,L, H,808),SIM900(A,D,908,968),ESP8266(安装在arduino上),以太网屏蔽等的变体。它对我有用,因为同样的问题在我看了差不多1-2周,但后者能够全部收到订阅消息,与通信模式无关(GSM,以太网,WiFi)
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