Not able to flash Arduino Nano 33 BLE sense

Official Hardware Nano Family Nano 33 BLE Sense
1

Hi all,
I bought a arduino nano 33 BLE sense just a week ago. Ubuntu is my development environment. I had to use Zephyr in Arduino nano 33 BLE sense. So I flashed the blinky example of Zephyr by using the below command:

arduino-cli upload -p /dev/ttyACM0 --fqbn arduino:mbed:nano33ble -i zephyr.bin

Then the board worked fine by blinking. But it seems the zephyr blinky application does not listen to /dev/ttyACM0 port. So I was not able to flash any other application in this board. I used arduino-cli and arduino IDE but no success. I even tried putting the board in bootloader mode by double pressing the RESET button and the LED was pulsing. Even after that I was not able to flash any other application.

The error I am always getting is No device found on ttyACM0 But arduino-cli board list command lists the board properly in bootloader mode.

Can somebody please help? It will be very helpful.

2

other option is the DFU mode of the nRF52. hold the reset button for a few seconds

3

Thank you for the reply. I tried holding the reset button for a few seconds but nothing happened. I think bootloader mode and DFU mode are same. Please clarify if they are different.

Also I tried with the below nrfutil command
nrfutil dfu usb-serial -pkg sketch_mbedos_jun27a.zip -p /dev/ttyACM0

It gives the error - TypeError: cannot convert 'NoneType' object to bytearray

Please help.

4

Hi all,
I just installed arduino IDE in Windows and then tried. I was able to flash successfully. Not sure how.

Could somebody guide me what's the best way to flash zephyr binaries? I need to develop all my work on zephyr.

Thanks in advance

5

Hi all,
Could somebody please help me how to recover the board using Ubuntu? I will not be able to access windows laptop all the time.

The error I am always getting is No device found on ttyACM0 But arduino-cli board list command lists the board properly in bootloader mode.

Please help

Thank you.

6

I found the solution from this link - No device found on ttyACM1 - even in bootloader mode

WHen the zephyr binary was running in the board, using arduino IDE, I initiated upload. Then when the log "Waiting for upload port" appears, I quickly put the board to bootloader mode by pressing the RST button twice.

Note: To get the verbose logs, you need to enable them in File-->Preferences

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