PCBs shipped today.

Started review of existing wiimote / esp32 libraries. 

• Arduino library looks to support accessories.  https://github.com/takeru/Wiimote
• Another Ardunio library:  https://github.com/bigw00d/Arduino-ESP32Wiimote
  • updated fork of above:  https://github.com/hrgraf/ESP32Wiimote

• ESP32-IDF https://github.com/MinatsuT/esp32_wii_remote

• Arduino reference for i2c accessories.  https://github.com/madhephaestus/WiiChuck
  

Another similar project, but much broader scope: https://github.com/darthcloud/BlueRetro

• Looks like accessories are supported
• Web interface for configuration
• Way more supported platforms / complexity
• Doesn't look like paddle potentiometers are implemented.
• Sdcard is used to persist some bluetooth data.  Might need to change ESP32 dev board to support.

i2c I/O Expander: 

• https://github.com/ARMmbed/gpio-pcal64 C++
• https://github.com/FaBoPlatform/FaBoGPIO-PCAL6408-Library Arduino, only 8-bit vs 16-bit

Digital Pot:

• https://github.com/RobTillaart/AD524X Arduino, well documented