bossac -a -i -d --port=ttyACM0 -U -i -e -w build/vidor_template.ino.bin -R
If you have another Arduino board which has 3.3v GPIOs, you may be able to use the following open-source SAMD programmer:
Here is example how to do with raspberry piOpen OCD for RaspberryPi
Hi,there is still the possibility you didn't clear the bootloader... please try doubletapping the button as soon as you attach the board to USB. the button is not a real reset so if you load a software that locks the processor the button won't do anything however unless you overwritten bootloader, it will still be executed and it''ll wait a bit before jumping to application and that's the small time window in which you can stay in bootloader by doubletapping
Worked perfect! Red LED on and I can see it in the IDE. Thanks!