Mini-Keyboard (numeric keyboard-ESP32)

1. ESP32 does not have USB function. Here, CH552 is used as a serial port to HID device, and ESP32 is responsible for the driver of LCD, buttons, encoder, and WS2812.
2. This project only has a USB mode in hardware design and does not design a battery management circuit, so it does not have the function of a Bluetooth keyboard.
3. You can choose the development environment by yourself.
4. Provide CH552 firmware.
5. Provide driver files for buttons, lights, encoders, and screens. (I will put it in the attachment after sorting it out).
6. Provide STL files of shell and positioning plate. Note: The ESP32 module used in the circuit does not have PSRAM, and the Flash is 4MB. It is recommended to use an ESP32 module
 
with a Flash of 8MB or more without PSRAM . Except for the hot-swappable base, the components used in the design file all use the Jiali Band-Aid chip library, so you can directly SMT after downloading the coordinate file, BOM file and Gerber file. After you get it, you only need to purchase an additional 1.9-inch LCD screen. , hot-swappable base (needs to be welded by yourself), shaft, satellite shaft, keycap.