Heart_Beat-Monitoring-System-Using-Raspberry-Pi-3/heartBeats.py at master · Abir1913/Heart_Beat-Monitoring-System-Using-Raspberry-Pi-3 · GitHub

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import time
from ISStreamer.Streamer import Streamer
import adafruit_ads1x15


if __name__ == '__main__':

    streamer = Streamer(bucket_name="demo",bucket_key="MP5C4E8FD3VS",access_key="ist_VyBltj0nrsQHMzsAQVwFVSnqj4MIea_9")

    adc = adafruit_ads1x15.ADS1115()
    GAIN = 2/3
    curState = 0
    thresh = 525
    P = 512
    T = 512
    stateChanged = 0
    sampleCounter = 0
    lastBeatTime = 0
    firstBeat = True
    secondBeat = False
    Pulse = False
    IBI = 600
    rate = [0]*10
    amp = 100
    z = 0

    lastTime = int(time.time()*1000)


    while True:

        Signal = adc.read_adc(0, gain=GAIN)
        curTime = int(time.time()*1000)

        sampleCounter += curTime - lastTime;
        lastTime = curTime
        N = sampleCounter - lastBeatTime;


        if Signal < thresh and N > (IBI/5.0)*3.0 :
            if Signal < T :
              T = Signal;
        if Signal > thresh and  Signal > P:
            P = Signal;

        if N > 250 :
            if  (Signal > thresh) and  (Pulse == False) and  (N > (IBI/5.0)*3.0)  :
              Pulse = True;                               # set the Pulse flag when we think there is a pulse
              IBI = sampleCounter - lastBeatTime;
              lastBeatTime = sampleCounter;

              if secondBeat :                        # if this is the second beat, if secondBeat == TRUE
                secondBeat = False;                  # clear secondBeat flag
                for i in range(0,10):             # seed the running total to get a realisitic BPM at startup
                  rate[i] = IBI;

              if firstBeat :                        # if it's the first time we found a beat, if firstBeat == TRUE
                firstBeat = False;                   # clear firstBeat flag
                secondBeat = True;                   # set the second beat flag
                continue


              runningTotal = 0;

              for i in range(0,9):
                rate[i] = rate[i+1];
                runningTotal += rate[i];

              rate[9] = IBI;
              runningTotal += rate[9];
              runningTotal /= 10;
              BPM = 60000/runningTotal;
              streamer.log("Heart-Beat Rate",BPM)
              print ('BPM: {}'.format(BPM))

        if Signal < thresh and Pulse == True :
            Pulse = False;
            amp = P - T;
            thresh = amp/2 + T;
            P = thresh;
            T = thresh;

        if N > 2500 :
            thresh = 512;
            P = 512;
            T = 512;
            lastBeatTime = sampleCounter;
            firstBeat = True;
            secondBeat = False;
            print (z)

        time.sleep(0.005)

 streamer.close()