项目链接：Sea-Picro

基于RP2040设计，支持Arduino Pro Micro规格。

两个不同版本：

• EXT, featuring an Elite-C pinout, with dedicated 5V RGB LED pin, but without a reset button.
• RST, featuring a pro micro pinout, with onboard RGB LED and reset button.

特色：

• Compatiable with most pro micro based keyboards
• RP2040 microcontroller, with dual M0+ processors at up to 133MHz
• Mid mount USB-C connector, which is low profile and can't be ripped off
• Optional Elite-C style pinout, adding an additional 5 IO for large keyboards
• Single button reset / bootloader circuit which changes behavior based on how long it's held (RP2040 usually requires two buttons to flash new firmware, making it challenging when installed upside down in a keyboard)
• ROM bootloader which prevents board from being bricked
• EXT version has a 5V level shifter and extra pin to drive strings of WS2812 LEDs.
• RST version has a WS2812 LED for use with CircuitPython or as a status indicator on the RST version.
• Onboard power LED.
• IO pinout identical to the Sparkfun RP2040 Pro Micro

文档：https://joshajohnson.com/sea-picro/#documentation