import dht

from machine import Pin, I2C, ADC

import time

# DHT22 setup

dht_sensor = dht.DHT22(Pin(15))

def read_dht22():

    dht_sensor.measure()

    temp = dht_sensor.temperature()

    humidity = dht_sensor.humidity()

    print(f"Temperature: {temp:.2f}°C, Humidity: {humidity:.2f}%")

    return temp, humidity

# I2C setup for BH1750

i2c = I2C(0, scl=Pin(5), sda=Pin(4))

class BH1750:

    PWR_DOWN = 0x00

    PWR_ON = 0x01

    RESET = 0x07

    CONT_H_RES_MODE = 0x10

    def __init__(self, i2c, addr=0x23):

        self.i2c = i2c

        self.addr = addr

        self.i2c.writeto(self.addr, bytearray([self.PWR_ON]))

    def luminance(self):

        self.i2c.writeto(self.addr, bytearray([self.CONT_H_RES_MODE]))

        time.sleep(0.2)

        data = self.i2c.readfrom(self.addr, 2)

        return (data[0] << 8 | data[1]) / 1.2

# BH1750 sensor instance

bh1750 = BH1750(i2c)

def read_bh1750():

    lux = bh1750.luminance()

    print(f"Light Intensity: {lux:.2f} lux")

    return lux

# MQ-135 setup

mq135_sensor = ADC(Pin(26))

def read_mq135():

    air_quality = mq135_sensor.read_u16()  # Read a 16-bit analog value

    print(f"Air Quality (Analog): {air_quality}")

    return air_quality

# Main loop

def main():

    while True:

        # Read data from DHT22

        temperature, humidity = read_dht22()

        # Read data from BH1750

        light_intensity = read_bh1750()

        # Read data from MQ-135

        air_quality = read_mq135()

        # Wait before next reading

        time.sleep(2)

if __name__ == "__main__":

    main()