用esp8266收发Grbl串口数据到mqtt

你可以使用ESP8266来连接到Grbl控制器的串口，并将数据MQTT协议发送到云端。面是一个简单的示例代码，你参考：

#include <ESP8266WiFi.h>
#include <PubSubClient.h>
#include <SoftwareSerial.h>

// WiFi配置
const char* ssid = "your_SSID";
const char* password = "your_PASSWORD";

// MQTT配置
const char* mqtt_server = "mqtt_server_address";
const int mqtt_port = 1883;
const char* mqtt_topic = "your_topic";

// Grbl串口配置
const int grbl_rx_pin = D1;  // ESP8266的D1引脚作为RX
const int grbl_tx_pin = D2;  // ESP8266的D2引脚作为TX
const int grbl_baudrate = 115200;

WiFiClient espClient;
PubSubClient client(espClient);
SoftwareSerial grblSerial(grbl_rx_pin, grbl_tx_pin); // 使用SoftwareSerial库创建软串口

void setup() {
  // 初始化串口和WiFi连接
  Serial.begin(115200);
  grblSerial.begin(grbl_baudrate);
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  
  // 连接到MQTT服务器
  client.setServer(mqtt_server, mqtt_port);
  while (!client.connected()) {
    if (client.connect("ESP8266Client")) {
      Serial.println("Connected to MQTT server");
    } else {
      Serial.print("Failed to connect to MQTT server, rc=");
      Serial.print(client.state());
      Serial.println(" Retrying...");
      delay(5000);
    }
  }
}

void loop() {
  // 读取Grbl串口数据
  if (grblSerial.available()) {
    String grblData = grblSerial.readStringUntil('\n');
    
    // 发布数据到MQTT服务器
    if (client.connected()) {
      client.publish(mqtt_topic, grblData.c_str());
    }
    
    Serial.println(grblData);
  }

  // 保持MQTT连接
  if (!client.connected()) {
    reconnect();
  }
  
  client.loop();
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    
    if (client.connect("ESP8266Client")) {
      Serial.println("Connected to MQTT server");
    } else {
      Serial.print("Failed to connect to MQTT server, rc=");
      Serial.print(client.state());
      Serial.println(" Retrying...");
      delay(5000);
    }
  }
}

请注意，你需要将代码中的"your_SSID"和"your_PASSWORD"替换为你的WiFi网络的名称和密码，并将"mqtt_server_address"替换为你的MQTT服务器地址。另外，你还需要安装ESP8266WiFi、PubSubClient和SoftwareSerial库，以便编译和上传代码到ESP8266开发板。

这是一个基本的示例，你可以根据自己的需求进行修改和扩展。希望能对你有所帮助！