Bluetooth shortcut keyboard

I also came up with this idea after seeing the CV engineer's special keyboard made by the guy who smoked when it was powered on. It mainly revolves around low-cost, simple and easy-to-use things. Because I have the ESP-WROOM-32 development board in my hand, I came up with this idea. The pin spacing is based on this. You can modify the pin number and pin position according to your own material for transplantation.
Materials:
1.ESP32 development board 2.Buttons*4 3.Female  
PCB design instructions.
Because the power interface is designed with a round picture and a solder mask layer, an error spacing will be reported when checking the DRC. If there is only this part during the check, If there is an error, just ignore it.
Software description:
The software uses the ESP32 keyboard simulation library address: https://gitee.com/fspace/ESP32-BLE-Keyboard#api-docs.
In the project attachment, there will be instructions on how to add external libraries to vscode. Video, you can refer to it.
The software part is developed using VSCode+pltaformmio. The comments in the software part are simple and easy to understand. You can read it with a little basic knowledge of C language. You can modify it according to your own needs to achieve different functions.
The physical display shows that
the headers are limited and some are not soldered. The data cable in the video is used for power supply. I have not soldered the battery myself. The power interface has been reserved. You can decide whether to solder it at your own discretion.