Ble to uart application too large in size after buttonless DFU integration

[AndreaFont]

Hi all,

I have integrated a slightly customised Ble to Uart example with the buttonless DFU implementation and libraries, and obviously its size inflated. I need to decrease this size a few kBs in order to fit into the nRF52810 flash.

I was wondering if I could remove something from what I see used in the buttonless example? Would it be acceptable to disable the bond requirement for the DFU?(In order to not need the PeerManager and to save some flash) Or is it the very minimum size?

Would you mind sharing some suggestions, if you have any? I am trying to optimise the Ble to Uart part too, but more info I have the best it is for me.

My last resource will be trimming the SDK files(i.e. removing logging), but I am trying to stay away from that point as much as I can.

SDK: 17.1.0
SD: 7.2.0
nRF52810
IDE: Segger Embedded Studio
Optimisation level: Level 2 for size

Thanks!

[Amanda Hsieh]

Hi, 

You can configure this buttonless example to either support bonds or not. If you don't need to bond, you can remove PeerManager. You might consider removing BSP if you don't use LED and Button. Removing logging is also a good idea. 

Regards,
Amanda

[AndreaFont]

Hi Amanda, 

Thanks for the reply.

Removing the PeerManager managed to free enough flash to include logging.

Just out of curiosity, is the string.h included in several parts of the nRF libraries coming from optimised versions for embedded solutions? or could someone implement just the few functions the stack(and the app) needs to reduce further the size?

Regards,
Andrea

[Amanda Hsieh]

Hi Andrea, 

The string.h is from SEGGER Microcontroller GmbH. Not sure they optimize the file or not. 

-Amanda