Welcome to my "Bluetooth" Kobo Page Turner project.

The project was born because my wife wanted a pageTurner for the KOBO Libra Colour, and everything she found didn't meet her needs, and as I had some material that I wasn't using, I decided to accept the challenge. Basically, I just needed to emulate a keyboard and be able to connect via Bluetooth, to avoid more connections.

This code will simply emulate a keyboard, that is all that is needed. You can change the button order to suit your needs. Or change the Led brightness.

//buttonPin1 = D5;     // Button 1 (will send Left Arrow)

//buttonPin2 = D4;     // Button 2 (will send Right Arrow)

//extLedPin = D9;      // External LED pin (GPIO9)

// LED_BRIGHTNESS = 1;  // Value between 0-255 for brightness (adjust as needed - If you want a flashlight, put the 255 :P)

(DOWNLOAD ARDUINO CODE HERE)

In order to use this on Kobo we must enable the " devmode ", to do so pls refer to this video that shows how to do it. https://www.youtube.com/watch?v=fA2ApXlZ0VU&t=56s

Once inside Devmode enable ( Force wifi On ) or Kobo system will automatically disable the connection after 2min. 

( Attention with this option on, the kobo Battery will drain out, the solution is to everytime you stop using the PageTurner, Go to setting and disable "Bluetooth and wi-fi".

Be free to go wild with the design, I made the design in function of my wife's desire.

Let me tell you that Kobo Bluetooth works very badly, but works, I understand that this device does everything to save battery, but it could be a little better.

I can't upload the code here so you have to download the code directly from my GitHub 

(DOWNLOAD ARDUINO CODE HERE)

LED behavior:

• LED ON = Not connected to Kobo Bluetooth
• LED OFF = Connected to Kobo Bluetooth
• LED turns off when entering sleep mode

How should it be turned on after it has been paired?

Turn on the PageTurner and only then activate Bluetooth on the Kobo.

The material I used:
- DevBoard - Seeed Studio XIAO ESP32C3. (Link)

- 2x buttons that I recovered from an old Dell mouse you can find the buttons here. (Link)
- A on/off slider switch to turn the equipment on and off, i have recover my sw from a LED battery case, you can find the sw here. (Link)
- An LED, to know when the connection is established. (Link)
- A battery I recovered from a ( Xiaomi Mi True Wireless Basic 2 ) charging case, but you can find the battery here: (Link)

- I did add 1k resistor to dim LED, but i decide to control the BRIGHTNESS by code, and 1k is very low.
- 2 x 12mm M3 screws.

- Color dot's to identify the on/off position are a bit of pla filament that i press fit .

If you make any improvements on the code, or design pls share with the community.

If you have any questions that I can help with, feel free to contact me.

mp3dpt@gmail.com

Happy making and printing.

//if you want to buy me a coffee - paypal.me/mmpires

Diagram: