# Micropython code for ESP32 with dual fans, LED, potentiometer, and DHT22 sensor

import machine
import time
from machine import Pin, PWM, ADC
import dht

# Define pin assignments
mosfet1_gate_pin = 22    # Connect to the gate of MOSFET controlling Fan 1
mosfet2_gate_pin = 23    # Connect to the gate of MOSFET controlling Fan 2
led_pin = 2              # Connect to the NPN transistor controlling the LED
potentiometer_pin = 34   # Connect to the potentiometer's wiper
dht22_pin = 4            # Connect to the data pin of the DHT22 sensor

# Initialize components
mosfet1_gate = Pin(mosfet1_gate_pin, Pin.OUT)
mosfet2_gate = Pin(mosfet2_gate_pin, Pin.OUT)
led_pwm = PWM(Pin(led_pin), freq=1000, duty=0)
potentiometer = ADC(Pin(potentiometer_pin))
dht22 = dht.DHT22(Pin(dht22_pin))

# Function to read potentiometer value
def read_potentiometer():
    return potentiometer.read()

# Function to control fan speed based on potentiometer value
def control_fan_speed(pot_value, mosfet_gate):
    duty_cycle = int(pot_value * 1023 / 4095)
    mosfet_gate.duty(duty_cycle)

# Function to control LED brightness based on potentiometer value
def control_led_brightness(pot_value):
    duty_cycle = int(pot_value * 1023 / 4095)
    led_pwm.duty(duty_cycle)

# Main loop
while True:
    try:
        # Read potentiometer value
        pot_value = read_potentiometer()

        # Control fan speeds
        control_fan_speed(pot_value, mosfet1_gate)
        control_fan_speed(pot_value, mosfet2_gate)

        # Control LED brightness
        control_led_brightness(pot_value)

        # Read temperature and humidity from DHT22
        dht22.measure()
        temperature = dht22.temperature()
        humidity = dht22.humidity()

        # Print sensor readings
        print("Potentiometer Value:", pot_value)
        print("Fan 1 Speed:", mosfet1_gate.duty())
        print("Fan 2 Speed:", mosfet2_gate.duty())
        print("LED Brightness:", led_pwm.duty())
        print("Temperature:", temperature)
        print("Humidity:", humidity)

        # Delay before the next iteration
        time.sleep(2)

    except Exception as e:
        print("Error:", e)
        time.sleep(2)