from machine import I2C, Pin, PWM, ADC
from utime import sleep
import dht
import utime
from pico_i2c_lcd import I2cLcd

# Initialize I2C for LCD
i2c = I2C(0, sda=Pin(0), scl=Pin(1), freq=400000)
I2C_ADDR = 0x27
lcd = I2cLcd(i2c, I2C_ADDR, 2, 16)
lcd.backlight_on()

# Initialize Light Dependent Resistor (LDR)
LDR = ADC(28)
pwm = PWM(Pin(15))
pwm.freq(1000)

# Initialize Ultrasonic Sensor pins
TRIGGER_PIN = Pin(3, Pin.OUT)
ECHO_PIN = Pin(4, Pin.IN)

# Initialize Motion Sensor pin
MOTION_PIN = Pin(16, Pin.IN)

# Initialize LED for motion detection
LED = Pin(2, Pin.OUT)

# Initialize DHT22 sensor
sensor = dht.DHT22(Pin(5))

def distance():
    TRIGGER_PIN.on()
    sleep(0.00001)
    TRIGGER_PIN.off()
    while not ECHO_PIN.value():
        pass
    pulse_start = utime.ticks_us()
    while ECHO_PIN.value():
        pass
    pulse_end = utime.ticks_us()
    pulse_duration = utime.ticks_diff(pulse_end, pulse_start)
    distance_cm = pulse_duration / 58.0
    return distance_cm

while True:
    try:
        # Temperature and Humidity measurement
        sensor.measure()
        lcd.clear()
        lcd.putstr(f"Temp: {sensor.temperature():.1f}")
        lcd.move_to(0, 1)
        lcd.putstr(f"Humidity: {sensor.humidity():.1f}")
        sleep(5)
        
        # Distance measurement
        dist = distance()
        lcd.clear()
        lcd.putstr(f"Distance: {dist:.2f} cm")
        sleep(5)
        
        # Light Intensity measurement
        value = LDR.read_u16()
        lcd.clear()
        lcd.putstr("Light Intensity: {}".format(value))
        pwm.duty_u16(value)
        if value < 5000:
            print("low")
            sleep(0.001)
        elif value > 5000:
            print("better")
            sleep(0.001)
        sleep(5)
        
        # Motion detection
        lcd.clear()
        if MOTION_PIN.value():
            lcd.putstr("Motion Detected")
        else:
            lcd.putstr("No Motion")
        sleep(5)
        
    except OSError as e:
        lcd.putstr('Failed reception')