带有 PubSubclient 的 esp8266 和 arduino 之间的 mqtt [英] mqtt between esp8266 and arduino with PubSubclient

问题描述

我在使用 WiFiEsp 库的 arduino 中使用 ESP8266.我想与 arduino 建立 MQTT 连接，所以我使用 PubSubclient 库.我得到错误:

<块引用>

正在尝试 MQTT 连接...失败，rc=-2 5 秒后重试

我的代码是:

#include #include #include #include "SoftwareSerial.h"#include IP地址服务器(212、72、74、21)；字符 ssid[] = "atmel";//您的网络 SSID(名称)char pass[] = "bets56789";//你的网络密码int 状态 = WL_IDLE_STATUS;//Wifi 无线电的状态//初始化以太网客户端对象WiFiEspClient espClient;PubSubClient 客户端(espClient)；软件串行软(2,3);//接收，发送无效设置(){//初始化串口以进行调试Serial.begin(9600);//为 ESP 模块初始化串口软开始(115200)；//初始化ESP模块WiFi.init(&soft);//检查屏蔽是否存在如果(WiFi.status()== WL_NO_SHIELD){Serial.println("WiFi 屏蔽不存在");//不要继续同时(真)；}//尝试连接到 WiFi 网络而(状态！= WL_CONNECTED){Serial.print("正在尝试连接到 WPA SSID:");Serial.println(ssid);//连接到 WPA/WPA2 网络status = WiFi.begin(ssid, pass);}//你现在已经连接上了，所以打印出数据Serial.println("您已连接到网络");//延迟(2000)；//连接到MQTT服务器客户端设置服务器(服务器，1883)；client.setCallback(回调);}//打印收到的订阅主题的任何消息无效回调(字符*主题，字节*有效载荷，无符号整数长度){Serial.print("消息到达[");Serial.print(主题)；Serial.print("] ");for (int i=0;i

我使用 WiFiEsp 库将 ESP8266 与 arduino 一起使用.我想与 arduino 建立 MQTT 连接，所以我使用 PubSubclient 库

解决方案

我不认为 PubSubClient 支持 WiFiEsp 作为来自 arduino 的网络层.

虽然 doc 列出了 ESP8266，但我相信这是直接在 ESP8266 硬件上运行 PubSubClient.>

I am using ESP8266 with arduino using WiFiEsp library.I want to make MQTT connection with arduino so I use PubSubclient library.i got error:

Attempting MQTT connection...failed, rc=-2 try again in 5 seconds

my code is:

#include <WiFiEsp.h>
#include <WiFiEspClient.h>
#include <WiFiEspUdp.h>
#include "SoftwareSerial.h"
#include <PubSubClient.h>

IPAddress server(212, 72, 74, 21);
char ssid[] = "atmel";           // your network SSID (name)
char pass[] = "bets56789";           // your network password
int status = WL_IDLE_STATUS;   // the Wifi radio's status

// Initialize the Ethernet client object
WiFiEspClient espClient;

PubSubClient client(espClient);

SoftwareSerial soft(2,3); // RX, TX
void setup() {
// initialize serial for debugging
Serial.begin(9600);
// initialize serial for ESP module
soft.begin(115200);
// initialize ESP module
 WiFi.init(&soft);

// check for the presence of the shield
if (WiFi.status() == WL_NO_SHIELD) {
Serial.println("WiFi shield not present");
// don't continue
while (true);
}

// attempt to connect to WiFi network
while ( status != WL_CONNECTED) {
Serial.print("Attempting to connect to WPA SSID: ");
Serial.println(ssid);
// Connect to WPA/WPA2 network
status = WiFi.begin(ssid, pass);
}

// you're connected now, so print out the data
Serial.println("You're connected to the network");
//delay(2000);
//connect to MQTT server
client.setServer(server, 1883);
client.setCallback(callback);
}

//print any message received for subscribed topic
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();
}

void loop() {
// put your main code here, to run repeatedly:
if (!client.connected()) {
reconnect();
}
client.loop();
}

 void reconnect() {
 // Loop until we're reconnected
 while (!client.connected()) {
 Serial.print("Attempting MQTT connection...");
 // Attempt to connect, just a name to identify the client
 if (client.connect("arduinoClient")) {
  Serial.println("connected");
  // Once connected, publish an announcement...
  client.publish("outSHADAB","hello world");
  // ... and resubscribe
  client.subscribe("inShadab");
  } else {
  Serial.print("failed, rc=");
  Serial.print(client.state());
  Serial.println(" try again in 5 seconds");
  // Wait 5 seconds before retrying
  delay(5000);
  }
  }
  }

I am using ESP8266 with arduino using WiFiEsp library.I want to make MQTT connection with arduino so I use PubSubclient library

解决方案

I don't think the PubSubClient supports the WiFiEsp as a network layer from an arduino.

While the doc list the ESP8266 I believe this is running the PubSubClient directly on the ESP8266 hardware.

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