import utime
from machine import I2C, Pin, Timer
from pico_i2c_lcd import I2cLcd

rooms = [
    {"trigger": Pin(2, Pin.OUT), "echo": Pin(3, Pin.IN)},
    {"trigger": Pin(4, Pin.OUT), "echo": Pin(5, Pin.IN)},
    {"trigger": Pin(6, Pin.OUT), "echo": Pin(7, Pin.IN)}
]

i2c = I2C(0, sda=Pin(0), scl=Pin(1), freq=400000)
lcd = I2cLcd(i2c, 0x27, 2, 16)

def measure_distance(trigger, echo):
    trigger.value(0)
    utime.sleep_us(2)
    trigger.value(1)
    utime.sleep_us(10)
    trigger.value(0)

    start_time = utime.ticks_us()
    while echo.value() == 0:
        start_time = utime.ticks_us()

    end_time = utime.ticks_us()
    while echo.value() == 1:
        end_time = utime.ticks_us()

    duration = utime.ticks_diff(end_time, start_time)
    distance = (duration * 0.0343) / 2
    return distance

def monitor_rooms(t):
    lcd.clear()
    for i, room in enumerate(rooms):
        distance = measure_distance(room["trigger"], room["echo"])
        print(f"Room {i + 1} Distance: {distance} cm")

        if distance < 100:
            lcd.clear()
            lcd.putstr(f"Burglar: Room {i + 1}")
            print(f"Motion detected in Room {i + 1}")
            utime.sleep(2)
            return


tim = Timer(mode=Timer.PERIODIC, freq=1, callback=monitor_rooms)