#include <SoftwareSerial.h>

import machine
import network
import time
import urequests
import ujson
import dht

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

# ThingSpeak API settings
THINGSPEAK_API_KEY = "TCD7Y8DBY9VYXHBR"
THINGSPEAK_URL = "http://api.thingspeak.com/update"

# LDR sensor connected to an analog pin (use GPIO pin supported for ADC)
LDR_SENSOR_PIN = machine.ADC(1)  # Replace with the correct pin for LDR in your setup

# DHT22 (AM2302) sensor on GPIO 4
dht_sensor = dht.DHT22(machine.Pin(4))

# Function to read analog data from the LDR sensor
def read_ldr():
    ldr_data = LDR_SENSOR_PIN.read_u16()  # Reads the LDR sensor data
    return ldr_data

# Function to calculate lux from ADC value
def cal_lux(ADC):
    vout = ADC / 65535 * 5
    RLDR = 2000 * vout / (1 - vout / 5)
    lux = pow(50 * 1000 * pow(10, 0.7) / RLDR, (1 / 0.7))
    return lux

# Function to read room temperature and humidity
def read_room_temperature_humidity():
    dht_sensor.measure()
    temperature = dht_sensor.temperature()
    humidity = dht_sensor.humidity()
    return temperature, humidity

# Function to send data to ThingSpeak with progress messages
def send_data_to_thingspeak(LUX, TEMP, HUMID):
    data = {
        "api_key": THINGSPEAK_API_KEY,
        "field1": LUX,
        "field2": TEMP,
        "field3": HUMID,
    }
    print("Preparing data to send...")
    try:
        print("Connecting to ThingSpeak...")
        response = urequests.post(
            THINGSPEAK_URL, data=ujson.dumps(data), headers={"Content-Type": "application/json"}
        )
        print("Data sent successfully!")
        print(f"ThingSpeak Response: {response.text}")
        response.close()
    except Exception as e:
        print(f"Error sending data: {e}")

# Initialize the Wi-Fi connection
def connect_to_wifi():
    wifi = network.WLAN(network.STA_IF)
    wifi.active(True)
    wifi.connect(WIFI_SSID, WIFI_PASSWORD)
    print("Connecting to Wi-Fi...")
    while not wifi.isconnected():
        time.sleep(1)
    print("Connected to Wi-Fi")

# Main execution loop
def main():
    connect_to_wifi()
    while True:
        try:
            print("Reading sensors...")
            ADC = read_ldr()
            LUX = cal_lux(ADC)
            TEMP, HUMID = read_room_temperature_humidity()
            print(f"LUX: {LUX:.2f}, TEMP: {TEMP:.2f}°C, HUMID: {HUMID:.2f}%")
            
            # Progress of sending data
            print("Sending data to ThingSpeak...")
            send_data_to_thingspeak(LUX, TEMP, HUMID)
            print("Waiting before next update...")
        except Exception as e:
            print(f"Error: {e}")
        time.sleep(10)  # Adjust the delay as needed

# Run the main loop
main()