import dht
import network
import urequests
import time
from machine import Pin

# Wi-Fi credentials
SSID = "Wokwi-GUEST"
PASSWORD = ""

# ThingSpeak
API_KEY = "YOUR_API_KEY"  # Replace with your Write API Key
URL = "http://api.thingspeak.com/update"

# DHT22 sensor
sensor = dht.DHT22(Pin(4))

# Wi-Fi connection
wlan = network.WLAN(network.STA_IF)
wlan.active(True)
wlan.connect(SSID, PASSWORD)
print("Connecting to Wi-Fi...")
while not wlan.isconnected():
    time.sleep(1)
print("✅ Connected:", wlan.ifconfig())

while True:
    sensor.measure()
    temp = sensor.temperature()
    hum = sensor.humidity()
    print("Temp:", temp, "°C  Humidity:", hum, "%")

    try:
        response = urequests.get(f"{URL}?api_key={7L9BGOG5W35QPP9V}&field1={temp}&field2={hum}")
        print("ThingSpeak response:", response.text)
        response.close()
    except Exception as e:
        print("❌ Upload failed:", e)

    time.sleep(20)  # respect ThingSpeak rate limit