nrf52833 bluetooth mesh and bootloader

[binhla]

Dears,

I am developing a device base on nrf52833 SOC, nrf Connect SDK ver2.0.0.

I run the bluetooth mesh sensor server example and I want to have OTA on it.

But when I enable CONFIG_BOOTLOADER_MCUBOOT, there is an error:
c:/ncs/toolchains/v2.0.0/opt/zephyr-sdk/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.exe: zephyr\zephyr_pre0.elf section `text' will not fit in region `FLASH'
c:/ncs/toolchains/v2.0.0/opt/zephyr-sdk/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.3.0/../../../../arm-zephyr-eabi/bin/ld.exe: region `FLASH' overflowed by 44772 bytes

Why was the FLASH overflowed?

Is that true that 512KB flash of the nrf52833 SOC is not enough for bluetooth mesh and bootloader both exist one application?

Best regards.

[Joakim Jakobsen]

Hi! 

We currently do not support Mesh DFU at this time. 

See Terje's answer in this post: 
OTA update mesh nCS 1.7.0 

And as Terje mentioned: For information on roadmaps and future features, pleace contact our sales representative for your area.

Br, 
Joakim

[binhla]

Dears,

Thank you for your prompt response.

I think you misunderstanded my question.

I was not trying to implement OTA or DFU via bluetooth mesh.

I tried to enable MCUBoot on nRF52833 which have bluetooth mesh. So that, the nrf52833 could run DFU from ble coexist or UART.

Is there anyway to reduce the FLASH size of a project with bluetooth mesh.

Best regards.

[Joakim Jakobsen]

Thanks. 

Sorry for the misunderstanding. I'll take a closer look and get back to you by the end of the day. 

Br, 
Joakim

[Joakim Jakobsen]

Hi again. 

Thank you for your patience. 

I don't think you will be able to reduce the size of the application enough to make this work. 

Talked to one of my colleagues with more experience on the topic; 

He suggested on of three options as a solution here: 

User a chip with more Flash, i.e the nRF52840. 
Do MCUBoot recovery mode. That way you don't need dual bank update (only serial). 
Or use external flash. 

Br, 
Joakim

[binhla]

Dears,

Thank you for your support.

Can you provide any MCUBoot recovery mode documents?

Best regards.