# Import modules
from machine import I2C, Pin, ADC
from time import sleep
import utime
from pico_i2c_lcd import I2cLcd
from dht import DHT22

# Initialize I2C for LCD
i2c = I2C(0, sda=Pin(0), scl=Pin(1), freq=400000)

# Set I2C address
I2C_ADDR = i2c.scan()[0]

# Create objects for DHT22, LCD, and ADC for LDR
dht = DHT22(Pin(5))
lcd = I2cLcd(i2c, I2C_ADDR, 2, 16)
ldr = ADC(Pin(28))

# Stepper Motor and LED Pins
DIR_PIN = Pin(2, Pin.OUT)
STEP_PIN = Pin(3, Pin.OUT)
LED_PIN = Pin(27, Pin.OUT)

# Threshold values for temperature, humidity, and light level
TEMP_THRESHOLD = 40       # Temperature threshold (40°C)
HUM_THRESHOLD = 50        # Humidity threshold (50%)
LDR_THRESHOLD = 5000     # LDR threshold (50,000)

# Function to run the stepper motor and turn off the LED
def run_stepper_motor():
    DIR_PIN.value(1)       # Set direction
    LED_PIN.value(0)       # Turn off LED when motor is running
    STEP_PIN.value(1)
    sleep(0.005)
    STEP_PIN.value(0)
    sleep(0.005)

# Function to stop the stepper motor and turn on the LED
def stop_stepper_motor():
    STEP_PIN.value(0)      # Ensure motor is off
    LED_PIN.value(1)       # Turn on LED when motor is stopped

# Main loop
while True:
    # Read temperature and humidity from DHT22
    dht.measure()
    temp = dht.temperature()
    hum = dht.humidity()
    
    # Read the LDR value
    ldr_value = ldr.read_u16()  # Reads a value between 0 and 65535
    
   
    
    # Display on LCD
    lcd.clear()
    lcd.putstr("The remote contol car is started")
    lcd.move_to(0, 1)
    

    # Check conditions for motor activation
    if temp > TEMP_THRESHOLD  or ldr_value < LDR_THRESHOLD:
        print("Starting the remote control car")
        run_stepper_motor() 
    else:
        print("Stopping the remote control car")
        stop_stepper_motor()