my pulse detect 200 more bpm

[lukaskris]

can you help me why my pulse detect more value, i didnt touch sensor, and if i touch the bpm isnt stable, im confuse for that, im use 4.7k resistor and 10k resistor and 10mf 32v kapasitor for reduce the noise, it cant help anything -_-

[biomurph]

Hello lukaskris,

I need more information to help you. Can you please send a photo of your setup? What OS are you using? What arduino board are you using? what code are you using?

[lukaskris]

i use arduino uno, im use windows 10, i use code pulse sensor amped with update HRV this is my screenshoot visualize in processing. my pulse if not touch like this, i didnt touch anything, what problem from my pulse, i didnt change anything from your code sir... thanks, i need your help sir,

setup in interrupt

void interruptSetup(){
// Initializes Timer2 to throw an interrupt every 2mS. TCCR2A = 0x02; // DISABLE PWM ON DIGITAL PINS 3 AND 11, AND GO INTO CTC MODE TCCR2B = 0x06; // DON'T FORCE COMPARE, 256 PRESCALER OCR2A = 0X7C; // SET THE TOP OF THE COUNT TO 124 FOR 500Hz SAMPLE RATE TIMSK2 = 0x02; // ENABLE INTERRUPT ON MATCH BETWEEN TIMER2 AND OCR2A sei(); // MAKE SURE GLOBAL INTERRUPTS ARE ENABLED
}

[biomurph]

Hi,

It does look like something has changed. What did you do besides add the blue '0 HRV'? Also, did you do anything to the Arduino code? It looks like from the picture that your data stream is not updating regularly.

[lukaskris]

include

/* Pulse Sensor Amped 1.4 by Joel Murphy and Yury Gitman http://www.pulsesensor.com ---------------------- Notes ---------------------- ---------------------- This code: 1) Blinks an LED to User's Live Heartbeat PIN 13 2) Fades an LED to User's Live HeartBeat 3) Determines BPM 4) Prints All of the Above to Serial Read Me: https://github.com/WorldFamousElectronics/PulseSensor_Amped_Arduino/blob/master/README.md
Updated with HRV display by Elliot Mebane, Roguish, Inc. Feb 2016 HRV requires 1 minute of data before it's accurate.

---

*/
LiquidCrystal_I2C lcd(0x27, 16, 2); // Variables int pulsePin = 0; // Pulse Sensor purple wire connected to analog pin 0 int blinkPin = 13; // pin to blink led at each beat int fadePin = 5; // pin to do fancy classy fading blink at each beat int fadeRate = 0; // used to fade LED on with PWM on fadePin

// Volatile Variables, used in the interrupt service routine! volatile int BPM; // int that holds raw Analog in 0. updated every 2mS volatile int Signal; // holds the incoming raw data volatile int IBI = 600; // int that holds the time interval between beats! Must be seeded! volatile boolean Pulse = false; // "True" when User's live heartbeat is detected. "False" when not a "live beat". volatile boolean QS = false; // becomes true when Arduoino finds a beat.

volatile int RRDelta = 0; volatile double RMSSD = 0; volatile double LN20RMSSD = 0; volatile double SDNN = 0; volatile double SDSD = 0; volatile double NN50 = 0; volatile double PNN50 = 0;

// Regards Serial OutPut -- Set This Up to your needs static boolean serialVisual = false; // Set to 'false' by Default. Re-set to 'true' to see Arduino Serial Monitor ASCII Visual Pulse

void setup(){ pinMode(blinkPin,OUTPUT); // pin that will blink to your heartbeat! pinMode(fadePin,OUTPUT); // pin that will fade to your heartbeat! Serial.begin(115200); // we agree to talk fast! interruptSetup(); // sets up to read Pulse Sensor signal every 2mS lcd.begin(); // IF YOU ARE POWERING The Pulse Sensor AT VOLTAGE LESS THAN THE BOARD VOLTAGE, // UN-COMMENT THE NEXT LINE AND APPLY THAT VOLTAGE TO THE A-REF PIN // analogReference(EXTERNAL);
}

// Where the Magic Happens void loop(){

serialOutput() ;       

if (QS == true){ // A Heartbeat Was Found // BPM and IBI have been Determined // Quantified Self "QS" true when arduino finds a heartbeat fadeRate = 255; // Makes the LED Fade Effect Happen // Set 'fadeRate' Variable to 255 to fade LED with pulse serialOutputWhenBeatHappens(); // A Beat Happened, Output that to serial.
lcd.clear(); lcd.print(BPM); QS = false; // reset the Quantified Self flag for next time
}

ledFadeToBeat(); // Makes the LED Fade Effect Happen delay(500); // take a break }

void ledFadeToBeat(){ fadeRate -= 15; // set LED fade value fadeRate = constrain(fadeRate,0,255); // keep LED fade value from going into negative numbers! analogWrite(fadePin,fadeRate); // fade LED }

[lukaskris]

i just download and uploading into my arduino i didnt know what the problem 1 problem sensor always output 200 more and 2 the output when i touch the sensor if my ESP8266 is on is bad, better if the ESP8266 off

[biomurph]

Hi,

This is not our base code. It has been modified. Notice in the loop function that there is a 500mS delay. That is what is causing you the biggest problem. Take that out and see what happens. Are you using the LCD with your project?

[lukaskris]

thanks it work well, why the delay set 20? and 500 make big problem? yes i use 4rd module, pulse+esp8266+sd+lcd i want create heart tracker with android, this HRV just stay 0??

[biomurph]

I would need to see what your processing sketch is doing to know why HRV is 0.

don't use any delay in the loop longer than 20, or else the loop will not see the heartbeats.

[lukaskris]

[lukaskris]

if i use RTC DS1302 for get the real time, can i use millis() for get delay to output in my lcd screen?

[biomurph]

You can use the Uno board millis() to time your LCD writes if you need to. You don't really need an RTC for that.

If you have your computer plugged into AC power, you can unplug it and see a much cleaner signal...

[lukaskris]

i use my laptop, and my laptop still connected with the adaptor, but my pulse hrv still 0 point, so if i want real time, where i must get it? from esp8266? or where? thanks