编辑代码

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

#define SOIL_MOISTURE_PIN A0   
#define RELAY_PIN D1           
#define DHTPIN D2              
#define DHTTYPE DHT22

const char xiao bao bao
const char JXC061205ly
const char mqtt_server 

int dryThreshold = 800;      
int wetThreshold = 400;       
unsigned long pumpDuration = 5000; 

WiFiClient espClient;
PubSubClient client(espClient);
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(115200);
  pinMode(RELAY_PIN, OUTPUT);
  digitalWrite(RELAY_PIN, LOW);
  dht.begin();
  
  setup_wifi();
  client.setServer(mqtt_server, 1883);
  client.setCallback(callback);
}

void loop() {
  if (!client.connected()) {
    reconnect();
  }
  client.loop();

  static unsigned long lastCheck = 0;
  if (millis() - lastCheck > 30000) { 
    lastCheck = millis();
    
    int moisture = analogRead(SOIL_MOISTURE_PIN);
    float humidity = dht.readHumidity();
    float temperature = dht.readTemperature();

    if (moisture > dryThreshold) {
      activatePump(pumpDuration);
    }

    char msg;
    snprintf(msg, 50, "{\"moisture\":%d,\"temp\":%.1f,\"humi\":%.1f}", 
             moisture, temperature, humidity);
    client.publish("flower/status", msg);
  }
}

void setup_wifi() {
  delay(10);
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

void callback(char* topic, byte* payload, unsigned int length) {
  String message;
  for (int i=0; i<length; i++) {
    message += (char)payload[i];
  }
  
  if (String(topic) == "flower/control") {
    if(message == "PUMP_ON") {
      activatePump(pumpDuration);
    }
    else if(message.startsWith("SET_DURATION:")) {
      pumpDuration = message.substring(13).toInt();
    }
  }
}

void activatePump(unsigned long duration) {
  digitalWrite(RELAY_PIN, HIGH);
  Serial.println("Pump activated");
  delay(duration);
  digitalWrite(RELAY_PIN, LOW);
  client.publish("flower/log", "Watering completed");
}

void reconnect() {
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    if (client.connect("ESPFlower")) {
      Serial.println("connected");
      client.subscribe("flower/control");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      delay(5000);
    }
  }
}