from machine import Pin 
import time 
relayin=Pin(12,Pin.OUT)
relayOut=Pin(18,Pin.OUT)
trig=Pin(33,Pin.OUT)
ECHO=Pin(32,Pin.IN)
ton=t=toff=distance=0
while 1:
    trig.on()
    time.sleep_us(10)
    trig.off()
    time.sleep_us(2)
    while ECHO.value()==0:
        toff=time.ticks_us()
    while ECHO.value()==1:
        ton=time.ticks_us ()   
    t=ton-toff   
    distance=(t*0.034)/2
    print(distance)
    
    water =400-distance
    print("water=",water,"distance = ",distance) 
    time.sleep_ms(50)
    if 100 < water <300:
        relayin.on()
        relayOut.on()
        print("etat moyenne est water =",water)
    elif water <100:
        relayin.off()
        relayOut.on()
        print("etat bas est water =",water)
    else:
        relayin.on()
        relayOut.off()   
        print("etat haut est water =",water)