import network
import time
from machine import Pin
import dht
from umqtt.simple import MQTTClient

# Paramètres WiFi
WIFI_SSID = "Wokwi-GUEST"

# Paramètres MQTT
CLIENT_ID = "dht22_sensor"
BROKER = "broker.mqttdashboard.com"
TOPIC = "serferweather"

# Connexion WiFi
wlan = network.WLAN(network.STA_IF)
wlan.active(True)
print("Connexion WiFi...", end="")
wlan.connect(WIFI_SSID)

while not wlan.isconnected():
    print(".", end="")
    time.sleep(0.1)
print(" OK")

# Connexion MQTT
client = MQTTClient(CLIENT_ID, BROKER)
client.connect()
print("Connexion MQTT réussie")

# Capteur DHT22
sensor = dht.DHT22(Pin(15))
prev_data = None

while True:
    sensor.measure()
    data = f'{{"temp":{sensor.temperature()},"humidity":{sensor.humidity()}}}'
    
    if data != prev_data:
        print("Envoi des données :", data)
        client.publish(TOPIC, data)
        prev_data = data
    else:
        print("Pas de changement")
        
    time.sleep(1)