Cannot add custom Service to nRF52820 using softdevice s140

RE: Cannot add custom Service to nRF52820 using softdevice s140

haakonsh — Fri, 19 Jun 2020 11:57:25 GMT

[quote user="Giannis Anastasopoulos"]Thank you for the suggestion, as this idea also worked, but then I wanted to enable the buttonless DFu and I realised that there some defines missing for the bootloader.[/quote]

I'm not that familiar with DFU, I suggest you open a separate Question for that issue.

[quote user="Giannis Anastasopoulos"]And another question regarding the nrf52820, does it support ADC? Is it possible to measure an analogue voltage with this device?[/quote]

It does not have and ADC, but it does have a configurable COMP — Comparator, maybe that covers your use-case.

RE: Cannot add custom Service to nRF52820 using softdevice s140

Giannis Anastasopoulos — Thu, 18 Jun 2020 16:15:13 GMT

haakonsh
Thank you for the suggestion, as this idea also worked, but then I wanted to enable the buttonless DFu and I realised that there some defines missing for the bootloader. Does the device support this functionality or not?

And another question regarding the nrf52820, does it support ADC? Is it possible to measure an analogue voltage with this device?

RE: Cannot add custom Service to nRF52820 using softdevice s140

haakonsh — Thu, 18 Jun 2020 09:40:16 GMT

Alternatively, you can use a SoftDevice version with a smaller memory footprint, like the S112.

RE: Cannot add custom Service to nRF52820 using softdevice s140

Giannis Anastasopoulos — Wed, 17 Jun 2020 21:06:11 GMT

This suggestion actually did the trick.

But now I am quite worried about this. I didn't realise how small the flash memory of this module is and I need to keep track of bonded devices, be able to update the firmware over the air and store some data in the flash. I begins to seem to much for this module

RE: Cannot add custom Service to nRF52820 using softdevice s140

Turbo J — Wed, 17 Jun 2020 20:26:49 GMT

[quote userid="80274" url="~/f/nordic-q-a/62728/cannot-add-custom-service-to-nrf52820-using-softdevice-s140"]but I am not sure how to fix it.[/quote]

The only real "fix" is to use bigger µC like the NRF52840.

You can also try setting NRF_LOG_ENABLED to 0 - since those log messages can use quite some flash space.

Note that your flash configuration won't work with FDS / Peer manager: These need at least 3 free flash pages, and your config has none.