from machine import Pin
import utime
t=Pin(15,Pin.OUT)
e=Pin(14,Pin.IN)
t1=Pin(22,Pin.OUT)
e1=Pin(21,Pin.IN)
buz=Pin(6,Pin.OUT)
c=0
p=0
while True:
    #In Sensor
    t.low()
    utime.sleep_us(2)
    t.high()
    utime.sleep_us(5)
    t.low()
    while e.value()==0:
        sigoff=utime.ticks_us()
    while e.value()==1:
        sigon=utime.ticks_us()
    tp=sigon-sigoff
    dist=(tp*0.0343)/2
    #Out 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
    if dist<=100:
        c=c+1
        p=p+1
    if dist1<=100:
        if c!=0:
            c=c-1
        else:
            c=0
    print('======================================')
    print('No of passengers in Bus:\t',c)
    print('Total no of passengers:\t',p)
    utime.sleep(2)