from machine import I2C, Pin, ADC
from time import sleep
from dht import DHT22
from pico_i2c_lcd import I2cLcd
import urequests
import network

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

# ThingSpeak API settings
THINGSPEAK_API_KEY = "0ARIHGR70ZITST3W"
THINGSPEAK_CHANNEL_ID = 2354374

dht = DHT22(Pin(15))
ldr_pin = Pin(26, Pin.IN)  # GPIO for the LDR sensor
ldr_adc = ADC(ldr_pin)

i2c = I2C(0, scl=Pin(5), sda=Pin(4), freq=100000)
I2C_ADDR = i2c.scan()[0]
lcd = I2cLcd(i2c, I2C_ADDR, 2, 16)

# Connect to WiFi
wifi = network.WLAN(network.STA_IF)
if not wifi.isconnected():
    print("Connecting to WiFi...")
    wifi.active(True)
    wifi.connect(WIFI_SSID, WIFI_PASSWORD)
    while not wifi.isconnected():
        pass
    print("Connected to WiFi")

def send_to_thingspeak(temp, hum, light):
    url = "https://api.thingspeak.com/update?api_key={}&field1={}&field2={}&field3={}".format(THINGSPEAK_API_KEY, temp, hum, light)
    response = urequests.get(url)
    response.close()

try:
    while True:
        dht.measure()
        temp = dht.temperature()
        hum = dht.humidity()

        # Read the LDR sensor value
        light_value = ldr_adc.read_u16()

        print("Temperature: {}°C Humidity: {:.0f}% Light: {}".format(temp, hum, light_value))
        send_to_thingspeak(temp, hum, light_value)

        lcd.clear()
        lcd.putstr('Temp: ' + str(temp) + " C")
        lcd.move_to(0, 1)
        lcd.putstr('Hum: ' + str(hum) + "%")
        lcd.move_to(0, 2)
        lcd.putstr('Light: ' + str(light_value))

        sleep(30)  # Delay for 30 seconds (ThingSpeak allows up to 15-second updates)

except KeyboardInterrupt:
    pass