from machine import I2C, Pin
from lcd_api import LcdApi
from pico_i2c_lcd import I2cLcd
import utime
import time
trigger = Pin(17, Pin.OUT)
echo = Pin(16, Pin.IN)
i2c = I2C(0, sda = Pin(0), scl = Pin(1), freq = 400000)
lcd = I2cLcd(i2c, 0x27, 2, 16)

  
while True:
    trigger.value(0)
    utime.sleep_us(2)
    trigger.value(1)
    utime.sleep_us(5)
    trigger.value(0)
    while echo.value() == 0:
       signaloff = utime.ticks_us()
    while echo.value() == 1:
       signalon = utime.ticks_us()
    timepassed = signalon - signaloff
    distance = (timepassed * 0.0343) / 2
    print("The distance ",distance,"cm")
    lcd.move_to(0,0)
    lcd.putstr("Distance Meter")
    lcd.move_to(0,1)
    lcd.putstr(str(distance) + " cm   ")
    utime.sleep(1)