import machine
import network
import time
import urequests
import ujson

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

# ThingSpeak API settings
THINGSPEAK_API_KEY = "CROIKG7BQN685IZA"
THINGSPEAK_URL = "http://api.thingspeak.com/update"

# Ldr sensor connected to an analog pin
LDR_SENSOR_PIN = machine.ADC(1)

# Function to read analog pin
def read_ldr():
    ldr_data = LDR_SENSOR_PIN.read_u16()
    return ldr_data

# Function to send data to ThingSpeak
def send_data_to_thingspeak(ldr):
    data = {
        "api_key": THINGSPEAK_API_KEY,
        "field1": ldr,
    }
    response = urequests.post(THINGSPEAK_URL, data=ujson.dumps(data), headers={"Content-Type": "application/json"})
    response.close()

# 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
while not wifi.isconnected():
    time.sleep(1)

print("Connected to Wi-Fi")

if __name__ == "__main__":
    try:
        while True:
            ldr = read_ldr()
            print(f"Lux: {ldr}")
            send_data_to_thingspeak(ldr)
            print("Data sent to ThingSpeak")
            time.sleep(15)  # Send data every 15 seconds (adjust the interval as needed)
    except KeyboardInterrupt:
        pass