import network
import urequests
from machine import ADC, Pin
import time

# ---- Wi-Fi Credentials ----
WIFI_SSID = "YOUR_WIFI_SSID"
WIFI_PASSWORD = "YOUR_WIFI_PASSWORD"

# ---- ThingSpeak API ----
THINGSPEAK_API_KEY = "28AC8HF7GNG2479W"  # Replace with your Write API Key
THINGSPEAK_URL = "https://api.thingspeak.com/update"

# ---- Hardware Setup ----
adc = ADC(Pin(26))        # Potentiometer on GP26 (ADC0)
led = Pin(15, Pin.OUT)    # Alert LED

# ---- Connect to Wi-Fi ----
print("Connecting to Wi-Fi...")
wlan = network.WLAN(network.STA_IF)
wlan.active(True)
wlan.connect(WIFI_SSID, WIFI_PASSWORD)

while not wlan.isconnected():
    print(".", end="")
    time.sleep(1)

print("\nConnected to Wi-Fi!")
print("IP Address:", wlan.ifconfig()[0])

# ---- Main Loop ----
while True:
    # Read humidity value
    raw_value = adc.read_u16()
    humidity = (raw_value / 65535) * 100  # Scale 0-100%

    print(f"Humidity: {humidity:.2f}%")

    # Alert if humidity > 80%
    if humidity > 80:
        led.value(1)
        print("⚠️ ALERT: High Humidity!")
    else:
        led.value(0)

    # Send data to ThingSpeak
    try:
        response = urequests.get(f"{THINGSPEAK_URL}?api_key={THINGSPEAK_API_KEY}&field1={humidity:.2f}")
        print("ThingSpeak response:", response.text)
        response.close()
    except Exception as e:
        print("Error sending data:", e)

    time.sleep(3)  # ThingSpeak free accounts require a 15-second delay