worldfamouselectronics / raspberry_pi Goto Github PK

import machine
import utime
from machine import Pin, Timer


sensor_BPM = machine.ADC(28)
conversion_factor = 3.3/65535
thresh = 37200
pin = Pin("LED",Pin.OUT)
holdstate = False
beats = 0
timer=Timer(-1) #virtual timer, the ID will be -1

def interuptHandle(timer):
    #global holdstate
    #holdstate = True
    global beats
    print('flag toggle')
    print('interupting, BPM is: ', (beats*10))
    utime.sleep(1)
    beats = 0

timer.init(period=6000, mode=Timer.PERIODIC, callback=interuptHandle)  

while True:
    if holdstate != True:
        reading = sensor_BPM.read_u16()
        if reading > thresh:
            pin.high()
            beats += 1
            utime.sleep_ms(100)
        else:
            pin.low()
        print("Voltage: ", reading)
    utime.sleep_ms(100)