New Open Source Project – Wearable ECG-EKG for 24h monitoring


We got interesting e-mail few days ago. Scott Andersson who is member of Olimex community and helped with our initial OLinuXino WIKI data structure suggested interesting idea.

He was following the new OLIMEXINO-NANO announcement and decided that it may be good base to make wearable ECG-EKG shield which to allow 24 hours ECG monitoring.

We already have some experience with OpenEEG which is one of the very first Open Source Hardware projects and I though that one such shield will be very useful to have.

Many people in Bulgaria and I guess the situation is same worldwide suffer from Heart diseases, and creating low cost ECG monitor which to may collect and log ECG data for 24 hours and later to allow this information to be downloaded visualized and analysed may help to diagnose in advance and take proper treatment for many heart diseases.

Scott have experience with ECG, so he offered help with the hardware design.

We will take care with the shield PCB layout, prototypes and low level firmware.

The target is to design and build low cost wearable device which:

  • use 3 electrodes ECG system
  • allow up to 24 hours monitoring
  • thin, small and compact size – chest stripe which anyone can wear under his/her cloths
  • logging to SD-card
  • LiPo battery with re-charging via USB or external adapter
  • data download via USB
  • galvanic isolation between USB and board
  • optional BLE Bluetooth Low energy wireless link which to allow apps from Android and iPhone to download the info from the device and do analyze/view
  • optional Pulse oximeter wither with finger or ear sensor

so far wiki page is created for this project where information is collecting

Anyone with interest and knowledge in this area is welcome to join the efforts!

Our Forum, IRC channel and Wiki are going to be used as media for discussions around this project.

10 Comments (+add yours?)

  1. Michael Paul Coder
    Oct 31, 2013 @ 15:30:48

    Shotgun writing the software to monitor the heartbeat during sleep and coding the algorithm to detect REM sleep by heart rate:


  2. ReQ
    Oct 31, 2013 @ 18:20:22

    I think for wearable computing you should make a board without sharp edges. Like (oval) or (round).


  3. Innovator
    Nov 01, 2013 @ 02:11:07

    For those interested in learning the latest on wearable technology, there is an event coming up next November 7 in New York City. Wearable Computing Conference 2013 New York City ( will show how next-generation technology is revolutionizing the human experience… People from Sony, Hitachi, Apple, Goldman Sachs, BioSensics, Kinetic Body Lab, HTC, Fingent, and many more leading companies will be in attendance. To reserve your seat, visit


  4. Dimitar Kolev
    Nov 01, 2013 @ 12:45:57

    To compare with commercial Holter device, one can look on this website (only in Bulgarian, you can use google translate). Commercial one is like 4ECG channels / 6 electrodes / 72hours record. I guess main price difference comes from postprocessing software… and important difference is the doctor reading the data.


    • Scott Anderson
      Nov 01, 2013 @ 14:01:58

      Dimitar, thanks for the link.
      I am having trouble understanding the translated website when looking at the price.
      do you happen to know the price of these devices


  5. Dimitar Kolev
    Nov 01, 2013 @ 16:56:14

    Hi Scott,
    I don’t know the exact price of the device (it is including hardware, PC station and software), but on a website is a sample price calculation per measurement with one deivce/48hours like 5euros and then 160 measurements per year over like 5 years use – it gives like 600Euro and this is possible price per delivered equipment. It is quite possible this price data to be old one, it is quite a inflation last years 🙂

    By the way, on bottom of another page is some science papers from the owner and designer Chavdar Levkov (in English). Can be useful…

    Entire Holter systems on ebay are between 100euro – 4k Euro, depending on hardware and software supplied, what I can see.


  6. Scott Anderson
    Nov 02, 2013 @ 08:18:38

    Hi All,
    It looks like one of the main challenges for EKG is the 50/60hz noise on the signal.
    The existing shield-EKG-EMG has this noise.
    I am looking for hardware solutions to this.
    Before i look for and test a number of solutions i wonder has anyone identified any for the Shield-EKG-EMG?

    If you could reply in the forums following thread that would be great



  7. Daler
    Nov 05, 2017 @ 05:18:30

    Hi Scott,

    We are actually trying to build something like this for school and have been wondering if you had any success so far. We would appreciate any insight!


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