S130 max concurrent central connections

[Cetin Mericli]

I am developing an application where a repeater unit connects to a number of other units, gets some info, aggregates it and broadcasts it as a peripheral unit (in a tree structure, the consolidated readings are propagated all the way up to a main receiver unit). Considering S130 as a combination of S110 and S120, I've always assumed that the max. number of concurrent connections are 8 (as it is in S120). However, when I try to connect more than 3 peripherals, I get NRF_ERROR_INTERNAL. I recently noticed that in the softdevice specification document for S130, it says max 3 central connections. I am using S130 v0.9 alpha, and nRF SDK 7.1.

So my question is two fold: i) is it true that S130 only supports up to 3 concurrent central connections? and ii) if so, what can I do to remedy that.

Many thanks in advance!

[Hung Bui]

@Cetin: I don't think there is any way to do that, strict timing needed to keep a connection. It's not possible to keep that when we disable and re-enable the softdevice.

[Cetin Mericli]

I see, thanks a lot Hung.