Custom open firmware for the Lenovo KU-1255 compact USB keyboard
- OpenViszla USB protocol analyzer
- 5V-tolerant PL2303 UART interface (e.g. https://www.adafruit.com/product/954)
- S15 pad (SN8F2288 UTX) connected to header for UART debug interface
Custom open firmware for the Lenovo KU-1255 compact USB keyboard