내실력키우기_수신기

from microbit import *
from machine import time_pulse_us
import radio
radio.config(group=100)
radio.on()

trig = pin1
echo = pin2

trig.write_digital(1)
echo.read_digital()

while True:
    msg = radio.receive()

    if msg == 'check':
        trig.write_digital(1)
        trig.write_digital(0)

        micros = time_pulse_us(echo, 1)
        distance = micros / 58.3  #time = 0.02 / 343 = 0.0000583 seconds, 1cm / 343000(cm/s) * 2(왕복 시간을 체크해야기 때문)
        display.scroll(str(int(distance)))
        sleep(1000)