import machine
import dht
import time

# Initialize the DHT22 sensor on GPIO pin 4
dht_sensor = dht.DHT22(machine.Pin(4))

# Define the GP26 (pin 26) as an ADC (Analog to Digital Converter) pin
adc = machine.ADC(26)

# Define the LED pin (for example, GP18, change it to your preferred GPIO pin)
led_pin = machine.Pin(9, machine.Pin.OUT)

# Function to read temperature from LM35 sensor
def read_lm35_temperature():
    lm35_pin = machine.Pin(0)  # GP0 (pin 0) for analog input
    adc_value = adc.read_u16()  # Read ADC value (0-65535)
    voltage = (adc_value / 65535) * 3.3  # Convert ADC value to voltage
    temperature_celsius = (voltage - 0.5) * 100  # LM35 linear temperature conversion
    return temperature_celsius

# Function to read light intensity from LDR sensor
def read_ldr_light_intensity():
    ldr_value = adc.read_u16()  # Read ADC value from LDR
    return ldr_value

while True:
    try:
        # Read temperature and humidity from DHT22 sensor
        dht_sensor.measure()
        temperature_celsius = dht_sensor.temperature()
        humidity_percentage = dht_sensor.humidity()
        
        # Read temperature from LM35 sensor
        lm35_temperature = read_lm35_temperature()
        
        # Read light intensity from LDR sensor
        ldr_intensity = read_ldr_light_intensity()
        
        # Print the sensor readings
        print(f"DHT22 Temperature: {temperature_celsius}°C, Humidity: {humidity_percentage}%")
        print(f"LM35 Temperature: {lm35_temperature}°C")
        print(f"LDR Light Intensity: {ldr_intensity}")
        
        # Control LED based on LDR intensity
        if ldr_intensity < 5000:  # Adjust this threshold as needed
            led_pin.value(1)  # Turn on the LED
        else:
            led_pin.value(0)  # Turn off the LED
        
        # Delay for a moment before taking the next reading
        time.sleep(2)
        
    except Exception as e:
        print(f"Error: {e}")