Arduino IDE doesn't recognize the onboard microcontroller on ODYSSEY - X86J4105/ X86J4125
If your Arduino IDE doesn't recognize the onboard microcontroller on ODYSSEY - X86J4105/ X86J4125, please add a jumper wire between RST Pin and GND Pin on the 4-Pin header (to the left of SAMD21's 28 pins) to reset the AMSAMDG21.