The eChook Nano v1.4 is an open source Arduino and Android based data logging and telemetry solution designed specifically for cars competing in Greenpower events.

While so many data logging options are black boxes, the eChook nano uses simple circuits that are covered in GCSE and A Level electronics curriculums, and well commented Arduino code to make the system as understandable as possible. Now includes genuine Arduino Nano Every.

Once assembled, the eChook board monitors all the sensors and sends the data over Bluetooth to the eChook app on your Android phone (sorry, iOS is not supported).

The eChook app augments this data with GPS data from the phone, tracking your laps and logs everything to a CSV file for later analysis.

Optionally, with a data connection the app can relay your data to the cloud in near real time allowing you to watch from the pits - or the other side of the world. This can be done through the public website, or privately on

The eChook logs:

  • Battery voltage (Each 12v battery individual)

  • Current

  • Throttle Position

  • Brake lever (on/off)

  • Temperature x2 (Suggested Ambien and Motor)

  • Speed x 2 (Wheel and Motor RPM)

The app augments this data with the phone sensors to give:

  • Amp hours used

  • Distance

  • Lap Number (requires GPS to be enabled and throttle input)

  • Gear number and ratio (for cars with multiple gears)

  • GPS position

What you will need to build this kit:

  • Soldering Iron

  • Solder

  • A little soldering ability - there's nothing too fiddly!

  • Multimeter

  • 24v/12v Power Supply (ideally a bench supply but batteries work too)

  • A computer with the Arduino IDE installed to upload the code to the Arduino)

  • Micro USB cable

Full documentation on building and using the eChook board - as well as schematics and a description of each sensor circuit - are available at

If you get stuck there is an online chat function built into the Documentation, and also a support forum at where we will get back to you as quickly as possible.

Further information:


Documentation and Build Instructions:

Support Forum:

Android App: Google Play Store