from machine import Pin
from utime import sleep_us, sleep_ms, ticks_us
from machine import I2C

from pico_i2c_lcd import I2cLcd

# Define the pins for ultrasonic sensor
TRIGGER_PIN = 2
ECHO_PIN = 3

# Define the pin for PIR sensor
PIR_PIN = 4

# Define LCD settings
LCD_COLS = 20
LCD_ROWS = 4

# Initialize I2C for LCD
i2c = I2C(0, sda=Pin(0), scl=Pin(1), freq=400000)
I2C_ADDR = i2c.scan()[0]
lcd = I2cLcd(i2c, I2C_ADDR, LCD_ROWS, LCD_COLS)

# Function to measure distance using ultrasonic sensor
def measure_distance():
    trigger = Pin(TRIGGER_PIN, Pin.OUT)
    echo = Pin(ECHO_PIN, Pin.IN)
    trigger.low()
    sleep_us(2)
    trigger.high()
    sleep_us(10)
    trigger.low()
    while echo.value() == 0:
        pass
    time_start = ticks_us()
    while echo.value() == 1:
        pass
    time_end = ticks_us()
    time_elapsed = time_end - time_start
    distance_cm = (time_elapsed / 2) / 29.1
    return distance_cm

# Function to detect motion using PIR sensor
def detect_motion():
    pir_pin = Pin(PIR_PIN, Pin.IN)
    return pir_pin.value()

# Main loop
i = 0
while True:
    # Measure distance
    distance = measure_distance()

    # Print distance to LCD
    lcd.move_to(0, 0)
    lcd.putstr("Distance: {:.2f} cm".format(distance))

    # Detect motion
    motion_detected = detect_motion()

    # Print motion detection status to LCD
    lcd.move_to(0, 1)
    lcd.putstr("Motion: {}".format("Detected" if motion_detected else "None"))

    sleep_ms(1000)  # Wait for 1 second before next iteration