from machine import Pin
import utime
t1=Pin(22,Pin.OUT)
e1=Pin(21,Pin.IN)
buz=Pin(6,Pin.OUT)
c=0
while True:
    #getting values from ultra sonic sensor
    t1.low()
    utime.sleep_us(2)
    t1.high()
    utime.sleep_us(5)
    t1.low()
    while e1.value()==0:
        sigoff=utime.ticks_us()
    while e1.value()==1:
        sigon=utime.ticks_us()
    tp1=sigon-sigoff
    dist1=(tp1*0.0343)/2
    #computing the movement of vehicle
    if dist1<=100:
        c=c+1
    else:
        if c!=0:
            c=c-1
        else:
            c=0
    print("=============================")
    print("No of vehicles Passed", c)
    #predicting the traffic of next junction
    #with number of current junction vehicles
    if c<10:
        print("Happy Journey\n\n")
    if c>=10 and c<15:
        print("Chance of increase in traffic\n\n")
    if c>=15:
        print("High traffic alert\n\n")
    utime.sleep(1)