import machine
import network
import time
import urequests
import ujson
import dht
from dht import DHT22

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

#Thingspeak API settings
THINGSPEAK_API_KEY = "Q4EY237OOZAHML86"
THINGSPEAK_URL = "http://api.thingspeak.com/update"

# DHT22 (AM2302) SENSOR ON GPIO 4
dht_sensor = dht.DHT22 (machine.Pin(4))

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

# 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 interpret condition
def interpret_conditions(lux, temperature, humidity):
    lux_condition = "Bright" if lux > 600 else "Dark"  # Adjust the threshold as needed
    temp_condition = "Hot" if temperature > 27 else "Cold"
    humidity_condition = "Wet" if humidity > 60 else "Dry"
    
    print(f"Lux Condition: {lux_condition}\nTemp Condition: {temp_condition}\nHumidity Condition: {humidity_condition}")
    
    if lux_condition == "Bright" and humidity_condition == "Dry" and temp_condition == "Cold":
        print("The room is suitable for reading")
    else:
        print("The room is not suitable for reading")

#Function for light intensity conversion
def read_ldr():
    GAMMA = 0.7
    RL10 = 50
    ldr_data = LDR_SENSOR_PIN.read_u16()
    voltage = ldr_data / 65535 * 5

    # Check for zero voltage to avoid division by zero
    if voltage == 5.0:
        return float('inf')  # Return infinity as a placeholder for undefined lux value

    resistance = 2000 * voltage / (1 - voltage / 5)
    lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA))
    return lux

# Function to send data to Thingspeak
def send_data_to_thingspeak(lux, temperature, humidity):
    data = {
        "api_key": THINGSPEAK_API_KEY,
        "field1": lux,
        "field2": temperature,
        "field3": humidity,
    }
    response = urequests.post(THINGSPEAK_URL, data=ujson.dumps(data), headers={"Content-Type": "application/json"})
    response.close()

#Initialize the wi-Fi connection
print("Connecting to WiFi", end="")
wlan = network.WLAN(network.STA_IF)
wlan.active(True)
wlan.connect("Wokwi-GUEST", "")
while not wlan.isconnected():
  print(".", end="")
  time.sleep(0.1)
print(" Connected!")
print(wlan.ifconfig())

if __name__ == "__main__":
    try:
        while True:
            lux = read_ldr()
            temperature, humidity = read_room_temperature_humidity()
            print(f"lux: {lux}")
            print(f"Temp: {temperature}")
            print(f"Hum: {humidity}")
            interpret_conditions(lux, temperature, humidity)  # Call interpret_conditions
            send_data_to_thingspeak(lux, temperature, humidity)  # Pass both temperature and humidity
            print("Data sent to Thingspeak")
            time.sleep(10)
    except KeyboardInterrupt:
        pass