Unable to use mcumgr DFU over serial from ubuntu

[Tushar_V]

Hi all,
I tried the Serial DFU sample with NRF52840-DK board in ubuntu

The project build and run.

When I use mcumgr the command work but was non possible to me upload a new image.

The mcumgr echo work:

mcumgr --conntype serial --connstring "/dev/ttyACM0,baud=115200" echo hello
hello

The mcumgr image list work:

mcumgr --conntype serial --connstring "/dev/ttyACM0,baud=115200" image list
Images:
image=0 slot=0
version: 0.0.0
bootable: true
flags: active confirmed
hash: ed709b43573bd8ab480672e00fb40dfa4d93da3e4aa849bc194a6e2c3a35f2a9
Split status: N/A (0)

The mcumgr image upload stall at 0%:

mcumgr --conntype serial --connstring "/dev/ttyACM0,baud=115200" image upload -e app_update.bin
0 B / 109.28 KiB [------------------------------------------------------------------------------------------] 0.00%

[Sigurd Hellesvik]

Hi

This issue seems similar to yours.
Could you try the fix suggested in there?

Regards,
Sigurd Hellesvik

[Tushar_V]

Hi,

i've added CONFIG_HEAP_MEM_POOL_SIZE=2048 in prj.conf but it shows same above behaviour

Regards

Tushar

[Sigurd Hellesvik]

Hi

Which version of nRF Connect SDK are you using?

When you communicate using the the USB connector to the debugges (J2), the serial data has to go via the debugger.
This could cause errors due to delays.
To avoid this, try to use the USB connector which goes directly to the nRF instead, marked nRF USB (J3).
For using the nRF USB you need to build the SMP Server sample with the following configurations:

west build -p -b nrf52840dk_nrf52840 -- -DOVERLAY_CONFIG="overlay-cdc.conf overlay-fs.conf" -DDTC_OVERLAY_FILE="usb.overlay"

(First program the board (west flash) from J2, then reconnect to J3 before using DFU (mcumgr))

Regards,
Sigurd Hellesvik

[Tushar_V]

Hi ,

Thank you

i was able to solve by changing usb.conf to mcuboot.conf

https://devzone.nordicsemi.com/f/nordic-q-a/83169/flashing-bootloader with this ticket

Regards

Tushar