Dashboard

{
  "temperature": 24.5,
  "humidity": 68.2,
  "soil_moisture": 61,
  "co2_level": 840,
  "light_intensity": 18400,
  "greenhouse_id": "greenhouse_01"
}

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

// DHT22 → GPIO4
DHT dht(4, DHT22);
WiFiClient wifi;
PubSubClient mqtt(wifi);

void setup() {
  WiFi.begin("SSID", "PASS");
  mqtt.setServer("mqtt.agrovision.uz", 1883);
  dht.begin();
}

void loop() {
  float t = dht.readTemperature();
  float h = dht.readHumidity();
  String json = "{\"temperature\":" + 
    String(t) + ",\"humidity\":" + 
    String(h) + "}";
  mqtt.publish("gh/greenhouse_01/sensor",
    json.c_str());
  delay(5000); // 5 sek
}