import machine
import network
import time
import urequests
import ujson
import dht

# WiFi credentials
WIFI_SSID = "Wokwi-GUEST"
WIFI_PASSWORD = ""

# ThingSpeak API settings
THINGSPEAK_API_KEY = "A82MLQ0QRV1FRCTK"
THINGSPEAK_URL = "http://api.thingspeak.com/update"

# DHT22 (AM2302) sensor on GPIO 4
dht_sensor = dht.DHT22(machine.Pin(4))

# Function to read room temperature and humidity
def read_room_temperature_humidity():
    dht_sensor.measure()
    temperature = dht_sensor.temperature()
    humidity = dht_sensor.humidity()
    return temperature, humidity

# Function to send data to ThingSpeak
def send_data_to_thingspeak(temperature, humidity):
    data = {
        "api_key": THINGSPEAK_API_KEY,
        "field3": temperature,
        "field4": humidity,
    }
    try:
        response = urequests.post(THINGSPEAK_URL, json=data)
        response.close()
        print("Data sent successfully")
    except Exception as e:
        print("Failed to send data:", e)

# Initialize the Wi-Fi connection
wifi = network.WLAN(network.STA_IF)
wifi.active(True)
wifi.connect(WIFI_SSID, WIFI_PASSWORD)

# Wait for the Wi-Fi connection to establish
print("Connecting to Wi-Fi...")
max_retries = 10
retries = 0

while not wifi.isconnected() and retries < max_retries:
    time.sleep(1)
    retries += 1
    print(f"Attempt {retries}...")

if wifi.isconnected():
    print("Connected to Wi-Fi")
else:
    print("Failed to connect to Wi-Fi")
    machine.reset()  # Optional: Restart the device

# Main program loop
if __name__ == "__main__":
    try:
        while True:
            temperature, humidity = read_room_temperature_humidity()
            print(f"Temp: {temperature}°C, Hum: {humidity}%")
            send_data_to_thingspeak(temperature, humidity)
            time.sleep(15)  # Send data every 15 seconds
    except KeyboardInterrupt:
        pass