MKR 1010 no longer detected after upload

Hardware MKR Family MKRWIFI1010
1

Hi, I hope this is the correct sub for this.

After uploading a binary to my MKR 1010 it is no longer detected as a USB device.

The binary (a .bin) I used was produced by Arduino 1.8.5 on Linux from the basic Blink sketch. I Manually triggered a reset using the 1200 baud open/close technique on the port. I then uploaded the binary using bossac 1.9.1 (I have a suspicion that this might have caused the problem) and mirrored the arguments used by the Arduino software. The upload appeared to be successful.

Upon resetting the Board turns on (green LED active) and the CHRG LED starts flashing rapidly. The board remains like this until disconnected from power.

The board is now no longer recognized under both Linux and Windows. It was previously working fine with both operating Systems.

  • I have followed the Loop-Back Test Instructions, the device is not detected at step 5.
  • I have tried pressing the reset button, nothing happens.
  • I have read the upload section of the troubleshooting guide.
  • I have tried quickly double pressing the reset button, again nothing happens.
  • I have removed all shields and other peripherals.
  • I have confirmed the USB cable is working.
  • I have tried a different cable.
  • I have tried using a power only cable.
  • I have tried various USB ports and hubs to no avail.
  • VCC-GND is 3.3 Volts
  • GND is not shorted to RESET

I am at my wits end with what else to try. Sadly I am also not within reach of an external USB to serial adapter.

Thanks in advance.

2

external USB to Serial adapter would not help. give one more chance to the double reset trick. but if that doens't work, it is small possiblity that with nonstandard upload you have overwritten the bootloader. you could try to upload it with a programmer or with other SAMD board. my MKRZERO suddenly stopped working and is not detected by programmer. one other tread here reported a suddenly dead MKR.