import time
from machine import Pin, ADC
from umqtt.simple import MQTTClient
import network
import dht
WIFI_SSID = "your_wifi_ssid"
WIFI_PASSWORD = "your_wifi_password"
MQTT_SERVER = "mqtt.server.com"
MQTT_PORT = 1883
MQTT_TOPIC_TEMP_HUMIDITY = "sensors/temperature_humidity"
MQTT_TOPIC_LIGHT = "sensors/light"
wifi = network.WLAN(network.STA_IF)
wifi.active(True)
wifi.connect(WIFI_SSID, WIFI_PASSWORD)

while not wifi.isconnected():
    time.sleep(1)
print("Connected to Wi-Fi")


mqtt_client = MQTTClient("esp32", MQTT_SERVER, port=MQTT_PORT)

def connect_mqtt():
    try:
        mqtt_client.connect()
        print("Connected to MQTT broker")
    except Exception as e:
        print("Error connecting to MQTT broker:", e)

dht_sensor = dht.DHT22(Pin(4))


ldr = ADC(Pin(34))
ldr.atten(ADC.ATTN_11DB)


while True:
    try:
        dht_sensor.measure()
        temperature = dht_sensor.temperature()
        humidity = dht_sensor.humidity()

        light_intensity = ldr.read()

        mqtt_client.publish(MQTT_TOPIC_TEMP_HUMIDITY, "%0.1f,%0.1f" % (temperature, humidity))
        mqtt_client.publish(MQTT_TOPIC_LIGHT, str(light_intensity))

        print("Temperature:", temperature, "°C")
        print("Humidity:", humidity, "%")
        print("Light Intensity:", light_intensity)

        time.sleep(10)  
    except Exception as e:
        print("Error:", e)
        connect_mqtt()