stm8_usb_mouse STM8S103F3P6: MCU is work at 3.3V PC7 – "D+ green line" PC6 – "D- white line" + 1,5 kOm pull up to +3.3V Compiler: ST Visual Develop + Cosmic CxSTM8 Source: https://github.com/ZiB/STM8S-USB https://github.com/wlianmin/stm8_usb