Not compatible with Processing 3.2.4

[SSJJYY]

These codes cannot be operated on Processing 3.2.4 successfully. Only can on Processing 2.2.1. Problems happens when you run it, it shows a blank display screen. Can you update codes for version 3.2.4? Thank you a lot.

[paulio23]

Second that.

[Fieryfire]

third that

On Sun, Feb 12, 2017 at 5:42 AM, paulio23 notifications@github.com wrote:

Second that.

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[mctosimaitb]

agree :)

[ShubhaM220]

why is it not working on processing 3.2.4 ??

[rubueh]

Ive made a pull request for the updated version of the heart rate monitor but have not gotten a response from Sparkfun. Here are some proposed changes for the code of the heart rate monitor, the old code could only function in the second version of Processing. The proposed changes now work for the newest version (3.3.2). I figured other individuals could benefit from this and help them get their project done faster and with a lot less headaches.

Explanation: The reason the old version does not function in the new version of processing is because Processing changed a bit the way the sketches are interpreted and removed some of the key parameters that were available in 2. Also the way that the original code was built highly depended on not having to use the draw function and implemented all those items into the serialEvent function. The code below is not meant as a permanent fix, rather a band aid fix, regardless it does work. Nevertheless, I do urge Sparkfun to please review the old code and help provide a version for the new Processing IDE.

Side-Note
: The only hiccup I encountered in modifying the code and comparing it to the old one's readings was that when it is supposed to be flat-line there is a negative charge that is registered occasionally, which was not there when run in Processing v2.

-RKB

**Also let me know how it works for you and I apologize if github changed a few of the signs.

//-----------------------------------New Code for Processing 3.2.+-----------------------------//

//All rights reserved to the original creators.

import processing.serial.*;

Serial myPort;
int xPos = 1;
float height_old = 0;
float height_new = 0;
float inByte = 0;

void setup () {
  //Window Size
  size(1080, 500);        

  // List serial ports
  println(Serial.list());
  myPort = new Serial(this, Serial.list()[0], 9600);
  myPort.bufferUntil('\n');

  //Background
  background(255);

  fill(color(0,0,0));
  text("Heart Rate Monitor v1.0", 10, 10);
}

void draw () {

     inByte = map(inByte, 0, 1023, 0, height);
     height_new = height - inByte; 
     line(xPos - 1, height_old, xPos, height_new);
     height_old = height_new;

      if (xPos >= width) {
        xPos = 0;
        background(255);
      } 
      else {
        xPos++;
      }
}

void serialEvent (Serial myPort) {
  // get the ASCII string:
  String inString = myPort.readStringUntil('\n');

  if (inString != null) {
    // trim off any whitespace:
    inString = trim(inString);

    if (inString.equals("!")) { 
      stroke(0, 0, 255);
      inByte = 512;
    }
    else {
      stroke(255, 0, 0);
      inByte = float(inString); 
     }
  }
}

[XDTZ]

@rubueh I felt very lucky finishing my wiring, immediately finding your fix no longer than a day after you posted! The code does work for me. However it seems serial plotter produce graph more clear than this. It might be some bad parts on my part. Ordering new ECG leads right now. Thanks anyway!

[rubueh]

@XDTZ I am glad the code was able to help and for getting back on how it works for you. If I can recommend something, while working on the wiring and programming I noticed my data was wonky while I had my charger plugged in to my laptop during testing. I then removed the charger and voila, it worked. So just double check your wiring or if you have an external power source that may be causing the interference, see if you can mend it. You may not need any extra items. Best of luck though!

[marziacescon]

Hi!

I'm still having the blank screen problem, despite I'm running the fixed script proposed here..I don't know what I'm doing wrong! I feel discouraged. Any chance I could get any help here?

Thanks heaps!

[Fieryfire]

Hi,

Do you see, if there is transmission through serial monitor?

On Wed, May 31, 2017 at 12:11 PM, Marzia notifications@github.com wrote:

Hi!

I'm still having the blank screen problem, despite I'm running the fixed script proposed here..I don't know what I'm doing wrong! I feel discouraged. Any chance I could get any help here?

Thanks heaps! [image: screen shot 2017-05-31 at 11 49 28] https://cloud.githubusercontent.com/assets/19808421/26627291/371e6f58-45fa-11e7-984b-0b4505d94f87.jpg

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[rubueh]

@marziacescon Hey, so the issue may be that you are not reading in the data in like @Fieryfire says. So you will need to go modify this line

myPort = new Serial(this, Serial.list()[2], 9600);

Specifically this part

Serial.list()[2]

Heres the quick run down, your computer has com ports that it creates when it wants to communicate with a device like bluetooth headphones, a USB mouse, or a USB stick. When the sketch runs you should see a list of available com ports show up. It looks something like this.

Then you are going to have to change that little piece of code starting at 0 and make your way up all the available com ports till you get the actual port the Heart Sensor is communicating its data through. Afterwards you should start seeing your data being graphed out.

Image Credit Source: Sparkfun Heart Rate Monitor Hookup Guide

[marziacescon]

Hi! Thanks for your prompt reply! I'm new to this so not experienced at all!

How do you see if you get transmission? I mean: I can plot things on the screen if I want to..just I can't visualize the ECG...

Marzia

On Wed, May 31, 2017 at 3:02 PM, Vivin Arikkudil notifications@github.com wrote:

Hi,

Do you see, if there is transmission through serial monitor?

On Wed, May 31, 2017 at 12:11 PM, Marzia notifications@github.com wrote:

Hi!

I'm still having the blank screen problem, despite I'm running the fixed script proposed here..I don't know what I'm doing wrong! I feel discouraged. Any chance I could get any help here?

Thanks heaps! [image: screen shot 2017-05-31 at 11 49 28] https://cloud.githubusercontent.com/assets/19808421/26627291/371e6f58- 45fa-11e7-984b-0b4505d94f87.jpg

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[marziacescon]

Hi,

got it. I tried to modify that in order to allow communication, but nothing happens still...

The ports are the following:

/dev/cu.Bluetooth-Incoming-Port /dev/cu.Bluetooth-Modem /dev/cu.Cons-SerialPort /dev/cu.usbserial-A904MJ7W /dev/tty.Bluetooth-Incoming-Port /dev/tty.Bluetooth-Modem /dev/tty.Cons-SerialPort /dev/tty.usbserial-A904MJ7W

Anything wrong in there?

Thanks again!

Marzia

On Wed, May 31, 2017 at 4:57 PM, Russell Buehling notifications@github.com wrote:

@marziacescon https://github.com/marziacescon Hey, so the issue may be that you are not reading in the data in like @Fieryfire https://github.com/fieryfire says. So you will need to go modify this line

myPort = new Serial(this, Serial.list()[2], 9600);

Specifically this part

Serial.list()[2]

Heres the quick run down, your computer has com ports that it creates when it wants to communicate with a device like bluetooth headphones, a USB mouse, or a USB stick. When the sketch runs you should see a list of available com ports show up. It looks something like this.

[image: image] https://cloud.githubusercontent.com/assets/25287258/26637873/e5898aea-45dd-11e7-8a82-f6278a5aa500.png

Then you are going to have to change that little piece of code starting at 0 and making your way up all the available com ports till you get the actual port the Heart Sensor is communicating its data through. Afterwards you should start seeing your data being graphed out.

Image Credit Source: Sparkfun Heart Rate Monitor Hookup Guide https://learn.sparkfun.com/tutorials/ad8232-heart-rate-monitor-hookup-guide

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[marziacescon]

When I change port, I get the following error message (attached )

[rubueh]

@marziacescon Hmmm first try checking all your wiring is correct, connect the ECG leads, run the sketch and see if can get a signal (even if its ugly one) from the leads just to make sure they are making contact and the wiring is correctly routing the signals by looking at the little heart LED on the sensor board. The other problem may be that if you have the Arduino program open, it is taking control of that port first to communicate with the Arduino itself. If so, just exit out, if not try to see what is taking up the communications port channel.

[rubueh]

@marziacescon I just realized your COM list simply looks different, so for every /dev/ item you see, that is a different port. So the port you are wanting to communicate through may actually be Serial.list()[5] according to the image you provided.

[Fieryfire]

I think it says port busy because you are opening the serial monitor from the arduino IDE as well. Let go of the the serial monitor and just let the code from processing run

On Thu, Jun 1, 2017 at 5:21 PM, Russell Buehling notifications@github.com wrote:

@marziacescon https://github.com/marziacescon I just realized your COM list simply looks different, so for every /dev/ item you see, that is a different port. So the port you are wanting to communicate through may actually be Serial.list()[5] .

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[marziacescon]

Hi!

Thank you for your suggestions.

I'm afraid to say, I still have the same problem.

• I'm letting the code from Processing only run (no Arduino)
• I have identified the correct port, i.e., I don't get the "port busy" message anymore.

But I still have only a blank screen...like no signals is going through. I've check the wiring as well and it seems correct...What shall I do now?

Thank you in advance!

Marzia

On Fri, Jun 2, 2017 at 9:09 AM, Vivin Arikkudil notifications@github.com wrote:

I think it says port busy because you are opening the serial monitor from the arduino IDE as well. Let go of the the serial monitor and just let the code from processing run

On Thu, Jun 1, 2017 at 5:21 PM, Russell Buehling <notifications@github.com

wrote:

@marziacescon https://github.com/marziacescon I just realized your COM list simply looks different, so for every /dev/ item you see, that is a different port. So the port you are wanting to communicate through may actually be Serial.list()[5] .

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.

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[marziacescon]

I'm thinking that maybe the AD8232 is faulty....

Marzia

On Fri, Jun 2, 2017 at 9:09 AM, Vivin Arikkudil notifications@github.com wrote:

I think it says port busy because you are opening the serial monitor from the arduino IDE as well. Let go of the the serial monitor and just let the code from processing run

On Thu, Jun 1, 2017 at 5:21 PM, Russell Buehling <notifications@github.com

wrote:

@marziacescon https://github.com/marziacescon I just realized your COM list simply looks different, so for every /dev/ item you see, that is a different port. So the port you are wanting to communicate through may actually be Serial.list()[5] .

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.

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[rubueh]

@marziacescon

I'm thinking it might be as well, if not ask someone else to double check everything as a last resort and no problem, I really do hope you can get it to work.

[marziacescon]

I do hope it as well.

I got already someone checking the wiring : it seems all is good. So i think the sensor might be faulty.

On 4 Jun 2017 9:48 PM, "Russell Buehling" notifications@github.com wrote:

@marziacescon https://github.com/marziacescon

I'm thinking it might be as well, if not ask someone else to double check everything as a last resort and no problem, I really do hope you can get it to work.

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[Fieryfire]

Does the serial port from the arduino IDE run any values to the the monitor?

On Sun, Jun 4, 2017 at 10:35 PM, Marzia notifications@github.com wrote:

I do hope it as well.

I got already someone checking the wiring : it seems all is good. So i think the sensor might be faulty.

On 4 Jun 2017 9:48 PM, "Russell Buehling" notifications@github.com wrote:

@marziacescon https://github.com/marziacescon

I'm thinking it might be as well, if not ask someone else to double check everything as a last resort and no problem, I really do hope you can get it to work.

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[marziacescon]

Actually not. No numbers. It's so frustrating!

Marzia

On Sun, Jun 4, 2017 at 11:33 PM, Vivin Arikkudil notifications@github.com wrote:

Does the serial port from the arduino IDE run any values to the the monitor?

On Sun, Jun 4, 2017 at 10:35 PM, Marzia notifications@github.com wrote:

I do hope it as well.

I got already someone checking the wiring : it seems all is good. So i think the sensor might be faulty.

On 4 Jun 2017 9:48 PM, "Russell Buehling" notifications@github.com wrote:

@marziacescon https://github.com/marziacescon

I'm thinking it might be as well, if not ask someone else to double check everything as a last resort and no problem, I really do hope you can get it to work.

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.

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[Fieryfire]

Using a multimeter, are you able to get any sort of readings from the analog output?

On Mon, Jun 5, 2017 at 9:34 AM, Marzia notifications@github.com wrote:

Actually not. No numbers. It's so frustrating!

Marzia

On Sun, Jun 4, 2017 at 11:33 PM, Vivin Arikkudil <notifications@github.com

wrote:

Does the serial port from the arduino IDE run any values to the the monitor?

On Sun, Jun 4, 2017 at 10:35 PM, Marzia notifications@github.com wrote:

I do hope it as well.

I got already someone checking the wiring : it seems all is good. So i think the sensor might be faulty.

On 4 Jun 2017 9:48 PM, "Russell Buehling" notifications@github.com wrote:

@marziacescon https://github.com/marziacescon

I'm thinking it might be as well, if not ask someone else to double check everything as a last resort and no problem, I really do hope you can get it to work.

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.

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[marziacescon]

Hi!

I'm going to borrow one as soon as I can.

In the meantime, I checked if the Arduino and Processing were able to communicate. I used the following scripts:

arduino

---

void setup() { //initialize serial communications at a 9600 baud rate Serial.begin(9600); }

void loop() { //send 'Hello, world!' over the serial port Serial.println("Hello, world!"); //wait 100 milliseconds so we don't drive ourselves crazy delay(100); }

processing

---

import processing.serial.*; Serial myPort; // Create object from Serial class String val; // Data received from the serial port void setup() { // I know that the first port in the serial list on my mac // is Serial.list()[0]. // On Windows machines, this generally opens COM1. // Open whatever port is the one you're using. String portName = Serial.list()[0]; //change the 0 to a 1 or 2 etc. to match your port myPort = new Serial(this, portName, 9600); } void draw() { if ( myPort.available() > 0) { // If data is available, val = myPort.readStringUntil('\n'); // read it and store it in val } println(val); //print it out in the console }

---

And what I get out printed in the console is: null null null ...

Do it seems that the Arduino is not talking to processing..maybe why I don't get any signal displayed. I swear, I followed the instructions literally and I'm not getting it to work! I thought I was going to learn things, instead I'm getting demoralised.

Marzia

On Mon, Jun 5, 2017 at 7:12 PM, Vivin Arikkudil notifications@github.com wrote:

Using a multimeter, are you able to get any sort of readings from the analog output?

On Mon, Jun 5, 2017 at 9:34 AM, Marzia notifications@github.com wrote:

Actually not. No numbers. It's so frustrating!

Marzia

On Sun, Jun 4, 2017 at 11:33 PM, Vivin Arikkudil < notifications@github.com

wrote:

Does the serial port from the arduino IDE run any values to the the monitor?

On Sun, Jun 4, 2017 at 10:35 PM, Marzia notifications@github.com wrote:

I do hope it as well.

I got already someone checking the wiring : it seems all is good. So i think the sensor might be faulty.

On 4 Jun 2017 9:48 PM, "Russell Buehling" notifications@github.com wrote:

@marziacescon https://github.com/marziacescon

I'm thinking it might be as well, if not ask someone else to double check everything as a last resort and no problem, I really do hope you can get it to work.

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.

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[marziacescon]

And this is what I get on the serial monitor

[Fieryfire]

Lets trouble shoot it step by step, the serial terminal from the arduino IDE shows you the above results? am i correct? it means there is something wrong from the arduino side itself.

1)Try the code using another system, windows (preferably?) 2)set the port of the arduino to be the same as the one in serial monitor. 3) Show more screenshots on your setup and lets see whats going.

On Mon, Jun 5, 2017 at 10:47 PM, Marzia notifications@github.com wrote:

And this is what I get on the serial monitor [image: screen shot 2017-06-05 at 22 45 29] https://cloud.githubusercontent.com/assets/19808421/26802476/e89abde6-4a40-11e7-9e90-afec31a3d58d.jpg

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[marziacescon]

Let's do it. I really appreciate your patience! Thanks.

So: 1) I have tried the code on a Windows machine 2) The port of the Arduino is the same of the serial monitor, i.e., COM3 (see pics) 3) I am attaching some pics of the results and the setup.

Hopefully we'll be able to sort things out.

[Fieryfire]

1) Try just outputing the hello world alone to serial. Show the result. If the basic hello world serial out fails to work. You should first troubleshoot this stage. 2) From the circuit wiring . Make sure to connect output of AD8232 to A0 of arduino board. Also is the arduino a 3.3v or a 5v??? Because the AD8232 is not 5V tolerant. 3) Make sure that when the FTDI is connected in the right direction, VCC ->VCC GND to GND,etc... Share the the pin layout of the arduino you are using.

On Tue, Jun 6, 2017 at 1:38 PM, Marzia notifications@github.com wrote:

Let's do it. I really appreciate your patience! Thanks.

So:

1. I have tried the code on a Windows machine
2. The port of the Arduino is the same of the serial monitor, i.e., COM3 (see pics)
3. I am attaching some pics of the results and the setup.

Hopefully we'll be able to sort things out. [image: pic1] https://cloud.githubusercontent.com/assets/19808421/26827381/48b16a5a-4abd-11e7-9612-8011e7a867ff.jpg [image: pic2] https://cloud.githubusercontent.com/assets/19808421/26827385/4f2235b8-4abd-11e7-985e-91e662869d9b.jpg [image: pic3] https://cloud.githubusercontent.com/assets/19808421/26827390/54146302-4abd-11e7-89df-9c1fad78e230.jpg [image: pic8] https://cloud.githubusercontent.com/assets/19808421/26827394/59b2b606-4abd-11e7-8ba5-0bf235e9b4e4.jpg [image: pic7] https://cloud.githubusercontent.com/assets/19808421/26827400/604b0ffe-4abd-11e7-8cd9-50b80025ad2e.jpg [image: pic6] https://cloud.githubusercontent.com/assets/19808421/26827403/64d5be2a-4abd-11e7-9cae-0e334e2c2ddc.jpg [image: pic5] https://cloud.githubusercontent.com/assets/19808421/26827407/68318df6-4abd-11e7-8789-aa20129faa95.jpg [image: pic4] https://cloud.githubusercontent.com/assets/19808421/26827408/6b9609d6-4abd-11e7-885a-872ac8056e9a.jpg

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[marziacescon]

Hi!

So, I managed to solve the above mentioned issues. Now I have the Arduino up and running and communicating with Processing.

The only thing now is that it's transmitting a sequence of '1023' corresponding to a flat red line. I haven't investigated this issue yet..so any help would be appreciated!!!! Thanks!

Marzia

On Tue, Jun 6, 2017 at 1:55 PM, Vivin Arikkudil notifications@github.com wrote:

1) Try just outputing the hello world alone to serial. Show the result. If the basic hello world serial out fails to work. You should first troubleshoot this stage. 2) From the circuit wiring . Make sure to connect output of AD8232 to A0 of arduino board. Also is the arduino a 3.3v or a 5v??? Because the AD8232 is not 5V tolerant. 3) Make sure that when the FTDI is connected in the right direction, VCC ->VCC GND to GND,etc... Share the the pin layout of the arduino you are using.

On Tue, Jun 6, 2017 at 1:38 PM, Marzia notifications@github.com wrote:

Let's do it. I really appreciate your patience! Thanks.

So:

1. I have tried the code on a Windows machine
2. The port of the Arduino is the same of the serial monitor, i.e., COM3 (see pics)
3. I am attaching some pics of the results and the setup.

Hopefully we'll be able to sort things out. [image: pic1] https://cloud.githubusercontent.com/assets/19808421/26827381/48b16a5a- 4abd-11e7-9612-8011e7a867ff.jpg [image: pic2] https://cloud.githubusercontent.com/assets/19808421/26827385/4f2235b8- 4abd-11e7-985e-91e662869d9b.jpg [image: pic3] https://cloud.githubusercontent.com/assets/19808421/26827390/54146302- 4abd-11e7-89df-9c1fad78e230.jpg [image: pic8] https://cloud.githubusercontent.com/assets/19808421/26827394/59b2b606- 4abd-11e7-8ba5-0bf235e9b4e4.jpg [image: pic7] https://cloud.githubusercontent.com/assets/19808421/26827400/604b0ffe- 4abd-11e7-8cd9-50b80025ad2e.jpg [image: pic6] https://cloud.githubusercontent.com/assets/19808421/26827403/64d5be2a- 4abd-11e7-9cae-0e334e2c2ddc.jpg [image: pic5] https://cloud.githubusercontent.com/assets/19808421/26827407/68318df6- 4abd-11e7-8789-aa20129faa95.jpg [image: pic4] https://cloud.githubusercontent.com/assets/19808421/26827408/6b9609d6- 4abd-11e7-885a-872ac8056e9a.jpg

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.

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[Fieryfire]

Can you explain, what was the problem before? it would be better if you mentioned the reason of the issue so that it will be helpful for others who read the forum.

The value 1023 means the adc is sending saturated values. The output is at 3.3v, You would normally expect values if i remember correctly at about half of that. at 1.1V while you have the electrodes on, use a multimeter to read the output.

On Sat, Jun 10, 2017 at 11:28 AM, Marzia notifications@github.com wrote:

Hi!

So, I managed to solve the above mentioned issues. Now I have the Arduino up and running and communicating with Processing.

The only thing now is that it's transmitting a sequence of '1023' corresponding to a flat red line. I haven't investigated this issue yet..so any help would be appreciated!!!! Thanks!

Marzia

On Tue, Jun 6, 2017 at 1:55 PM, Vivin Arikkudil notifications@github.com wrote:

1) Try just outputing the hello world alone to serial. Show the result. If the basic hello world serial out fails to work. You should first troubleshoot this stage. 2) From the circuit wiring . Make sure to connect output of AD8232 to A0 of arduino board. Also is the arduino a 3.3v or a 5v??? Because the AD8232 is not 5V tolerant. 3) Make sure that when the FTDI is connected in the right direction, VCC ->VCC GND to GND,etc... Share the the pin layout of the arduino you are using.

On Tue, Jun 6, 2017 at 1:38 PM, Marzia notifications@github.com wrote:

Let's do it. I really appreciate your patience! Thanks.

So:

1. I have tried the code on a Windows machine
2. The port of the Arduino is the same of the serial monitor, i.e., COM3 (see pics)
3. I am attaching some pics of the results and the setup.

Hopefully we'll be able to sort things out. [image: pic1] https://cloud.githubusercontent.com/assets/ 19808421/26827381/48b16a5a- 4abd-11e7-9612-8011e7a867ff.jpg [image: pic2] https://cloud.githubusercontent.com/assets/ 19808421/26827385/4f2235b8- 4abd-11e7-985e-91e662869d9b.jpg [image: pic3] https://cloud.githubusercontent.com/assets/ 19808421/26827390/54146302- 4abd-11e7-89df-9c1fad78e230.jpg [image: pic8] https://cloud.githubusercontent.com/assets/ 19808421/26827394/59b2b606- 4abd-11e7-8ba5-0bf235e9b4e4.jpg [image: pic7] https://cloud.githubusercontent.com/assets/ 19808421/26827400/604b0ffe- 4abd-11e7-8cd9-50b80025ad2e.jpg [image: pic6] https://cloud.githubusercontent.com/assets/ 19808421/26827403/64d5be2a- 4abd-11e7-9cae-0e334e2c2ddc.jpg [image: pic5] https://cloud.githubusercontent.com/assets/ 19808421/26827407/68318df6- 4abd-11e7-8789-aa20129faa95.jpg [image: pic4] https://cloud.githubusercontent.com/assets/ 19808421/26827408/6b9609d6- 4abd-11e7-885a-872ac8056e9a.jpg

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.

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[marziacescon]

Hi!

I see. I understand that 1023 corresponds to saturated output but I don't understand why...I have checked the soldering and the connections: all good. Leads off detection is working, but I don't get why the output stays at 3.3V whenever I have the three electrodes on. Any guess? Would you have a suggestion on how to solve this issue?

Thank you so much in advance!!

[Fieryfire]

1023, is the converted value of 3.3V output from the AD8235. The Arduino ADC is working at 10-bit conversion rate. 2^10 gives 1024. Hence the value.

For why the value is saturated. Are you placing the two electrodes in close proximity? the 3rd electrode is to take out the 50Hz noise from the power lines (if i remember correctly)

On Sat, Jun 17, 2017 at 5:14 PM, Marzia notifications@github.com wrote:

Hi!

I see. I understand that 1023 corresponds to saturated output but I don't understand why...I have checked the soldering and the connections: all good. Leads off detection is working, but I don't get why the output stays at 3.3V whenever I have the three electrodes on. Any guess? Would you have a suggestion on how to solve this issue?

Thank you so much in advance!!

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub https://github.com/sparkfun/AD8232_Heart_Rate_Monitor/issues/7#issuecomment-309220850, or mute the thread https://github.com/notifications/unsubscribe-auth/ASVTryT1C9dA_uqSX1tZReDzSlvGC9hjks5sE-1EgaJpZM4L5dAO .

[marziacescon]

Actually, I'm putting them on the wrists. And I get only a flat line corresponding to 1023...I can't solve it! Any help would be much more than welcome!

[Fieryfire]

It could be several reasons. But first connect your analog output to an oscilloscope. Application of salt water over the wrists should increase conductivity between the skin and the electrodes. I personally havent tried with the wrists. In my personal test last year, i had place the electrodes in close proximity near to the heart and the third electrode right below. Can you try this set up and see if you are able to observe any difference?

On Mon, Jun 19, 2017 at 9:34 AM, Marzia notifications@github.com wrote:

Actually, I'm putting them on the wrists. And I get only a flat line corresponding to 1023...I can't solve it! Any help would be much more than welcome!

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[Grahldg]

@rubueh thank you for your insights. The latest update was tested compatible with Processing 2.2 and 3.3.7.