nRF51 to nRF51 throughput

[Gregor Bader]

Hi!

We are using S130 softdevice in peripheral role and achieve the specified maximum throughput of 63.4kbps (S130 spec) when communicating with a PC and connection interval is set to 7.5ms. Multiple packets are sent in one connection interval.

We would like to reach same throughput when using a nRF51 instead of PC device. Is this possible? Or are we really limited to only 1 packet per connection interval?

best regards, Gregor Bader

[run_ar]

Yes, S130 v1.0.0 is limited to 1 packet per connection event in average. This will change for S130 V2.0.0 where it will be 6 packets. For now it is possible to use S130 v2.0.0-4.alpha which support 3 packets per connection event.

[Gregor Bader]

Hi,

Thanks a lot! I have successfully switched to this version and verified the 3 packets @ 7.5ms. Configuration is a little bit weird (tx/rx counts, low/mid/high bandwidth).

Looking forward to the final release with 6 packets :-D.

best regards, Gregor Bader

[Patrice Rudaz]

@gregorbader or @run_ar I'm running actually a central device using the S130 and SDK 9. My project is set up with CMSIS Packages on Keil uVision. How can I switch to the alpha version to try this new S130's feature ?

Regards Patrice

[run_ar]

I have to admit I don't use packs that much, but I guess you have to remove the softdevice pack from your project, then add the S130 header files to it as you would if you didn't use pack. This means adding include paths for the new header files. Alternatively you have to wait for the production release to come in the pack system.

[Patrice Rudaz]

In fact I did the changes of the header files and it almost run correctly except of an error of Keil compiler which does not allow declaration of array without size (#70: incomplete type is not allowed), even with C99 option enabled !