NRF52805 support for Central?

[rsramki]

Hi,

S112/S113 is currently the only supported SoftDevice on nRF52805 and doesn't support Central (Only Peripheral). Is there a plan to enable S132, SoftDevice Central are suited for end products.? If yes by when can we expect? 

Regards,

Ramki

[Karl Ylvisaker]

Hello Ramki,

I can not say anything for certain about future SoftDevice with central support for the nRF52805. However, the device has very limited flash size, so fitting a SoftDevice with support for a central role is challenging since the application already has a quite restricted size.

We try not to speculate in any future releases or possibilities here on DevZone. For such questions, please contact your local RSM ( Regional Sales Manager ) - if you do not know who that is, send me a personal message with your location details and I will provide you with their contact information.

Best regards,
Karl

[Gaurav Kapoor]

i sent u an email Rama , can talk next week to help in your Selection tks Gk

[fionut]

the S40 soft device is 150kB in size so it would fit into 192kB flash memory of nRF52805, even though the remaining size for the app is very small.

is there any other reason why there is no central role support?

Also there are some posts on internet which showed that modified versions of softdevice S132v5.1  managed to achieve multiple roles .

[Karl Ylvisaker]

fionut said:

the S40 soft device is 150kB in size so it would fit into 192kB flash memory of nRF52805, even though the remaining size for the app is very small.

Sure, but there are also other requirements - running a central also requires more RAM, which the nRF52805 only has 24 kB of.

fionut said:

is there any other reason why there is no central role support?

I have not been involved with the development of these SoftDevices, so I do not really have a lot of information about the design choices here, but if I had to take a guess I would say that this likely is one of the main reasons, yes.
The nRF52805 is a subset of the other nRF52 series devices - it is made specifically as a smaller device perfect for specific peripheral type devices.

As mentioned in my previous comment we do not discuss roadmaps and/or future releases here on DevZone, so if you have questions about this you will have to inquire your Regional Sales Manager (RSM) directly. Send me a direct message with your location if you do not know who your RSM is, so I may provide you their contact information.

fionut said:

Also there are some posts on internet which showed that modified versions of softdevice S132v5.1  managed to achieve multiple roles .

Please be specific about which posts you are referring to here so I could take a look.

Best regards,
Karl

[fionut]

Ok, I understand that RAM may be a constraint. 

And that for specific use cases which need a small simple device, with few functions, peripheral role is enough. 

We want to build a such small simple device with few functions, but with central role (bassically a button over BLE, battery powered)

https://jimmywongiot.com/2021/08/19/multiple-role-on-the-nordic-nrf52805/