Setting up the Bluetooth
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This is a process that should only need doing once to each bluetooth module. It comes programmed from the factory called ‘HC05’ and set to a baud rate of 9600. Before use, we need to set the baud rate to 115200, and change the name - potentially to that of the car it will be fitted to.
There are two steps to the process. The first is entering the bluetooth name you want and saving that to the Arduino. The second is using the Arduino to send the configuration to the bluetooth module itself.
As of eChook Arduino code version 2.0, you can set the name by going to configure.echook.uk in either Chrome or Edge browsers and connecting your eChook. For more information see the section.
Alternatively, the old method still works. When the eChook Arduino code is open in the Arduino IDE there will be a tab called ‘Calibration.h’. The first parameters in this file are the bluetooth settings.
Save and upload the new code to the Arduino.
These steps differ between versions of the board. If you have a V2.0+ board and have cut the JP3 jumper on the back of the board, this disables the automatic configuration, and you need to follow the V1.x procedure.
We are aware of a few of the eChook Nano V2.0 kits from early 2025 being sent out with incompatible Bluetooth modules. If you have a V2.0 kit, and are having issues getting data in the app, please see the .
V2.0+ of the board automatically configures the bluetooth module each time it is first powered on. Once you have set the bluetooth name, disconnect the USB, wait a couple of seconds and reconnect it. The red LED on the bluetooth module should come on for ~1s, turn off, then start flashing. This indicates a successful configuration. To see more information on the process, open the Arduino IDE, and start the serial monitor, connected to the Arduino Nano Every COM port. Now perform the power cycle described above, and the eChook will print debug information to the serial monitor.
The board is now ready to be paired with a phone!