import machine
import utime
import dht

# Initialize UART for ESP8266
uart = machine.UART(0, baudrate=115200, tx=machine.Pin(0), rx=machine.Pin(1))

# Initialize DHT22 sensor
sensor = dht.DHT22(machine.Pin(15))

# Function to send AT command to ESP8266
def send_at_command(command, delay=1):
    uart.write((command + '\r\n').encode())
    utime.sleep(delay)
    while uart.any():
        print(uart.read().decode())

# Connect to WiFi
def connect_wifi(ssid, password):
    send_at_command('AT+RST', 2)
    send_at_command('AT+CWMODE=1')
    send_at_command(f'AT+CWJAP="{ssid}","{password}"', 5)

# Send data to ThingSpeak
def send_to_thingspeak(api_key, temperature, humidity):
    send_at_command('AT+CIPSTART="TCP","api.thingspeak.com",80', 2)
    data = f"GET /update?api_key={api_key}&field1={temperature}&field2={humidity}"
    send_at_command(f'AT+CIPSEND={len(data)+2}', 2)
    uart.write((data + '\r\n').encode())
    utime.sleep(2)
    send_at_command('AT+CIPCLOSE', 1)

# Main program
ssid = 'POCO'
password = 'e77337aa59a3'
api_key = 'SVCBCXYLRRF9XQSS'  # Replace with your ThingSpeak Write API Key

connect_wifi(ssid, password)

while True:
    try:
        sensor.measure()
        temp = sensor.temperature()
        hum = sensor.humidity()
        print(f"Temperature: {temp}°C, Humidity: {hum}%")
        send_to_thingspeak(api_key, temp, hum)
    except Exception as e:
        print('Error:', e)
    utime.sleep(15)