mcumgr image upload command is resetting the nrf52840dongle having smp_svr over cdc application

[Bhavya Mathukiya]

Hi Team,

Setup:

Application: smp_svr with overlay-cdc.conf

Board: nrf52840dongle_nrf52840

NCS: 1.7.0

System: Windows

Tool: mcumgr

I am trying to upload an image into my nrf52840 dongle (running smp_svr over cdc) using mcumgr image upload command but it resets the dongle. All other command like image list, echo, reset works fine. Below is the snap shot of working command. 

mcumgr image upload command snap shot which is not uploading iamge and dongle gets reset

PS: I have tried to run smp_svr with cdc on nrf52840dk and I am able to upload image after increasing the work q stack size

CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=3072. But same doesnt work for nrf52840 dongle. Can you please check if I am missing anything here?

Regards,

Bhavya

[Amanda Hsieh]

Hi, 

Please refer to the Using MCUboot in Serial Recovery Mode documentation. 

Regards,
Amanda

[Bhavya Mathukiya]

Hi Amanda Hsieh, Thanks for your response. Btw I have already referred this link before. What exactly I have to look in to this link to make mcumgr image upload command to work?

Regards,

Bhavya

[Amanda Hsieh]

Hi, 

Do you flash MCUboot as the doc describes? The dongle default includes the open bootloader which doesn't support the mcumgr tool. It needs to update with MCUboot first, press the SW1 button to get into recovery mode, then it can use mcumgr image upload command. 

Please follow the steps in Option 2: Using MCUboot in Serial Recovery Mode section to update via CDC. I have tested the flow, and it can work. 

-Amanda