What is maximum number of BLE connections that can be made with the nRF51 Dongle

[Rodrigo]

What is maximum number of BLE connections that can be made with the nRF51 Dongle using soft device S130? and S310?

[Stefan Birnir Sverrisson]

Hi Rodrigo

The S130 can be configured as peripheral and central at the same time. It can maintain 3 central links and 1 peripheral link.

For S310, it is BLE peripheral + ANT, so it can maintain one BLE peripheral link to a central.

See the Softdevice specification for further information

Update 30.10.2015 The above information is correct for S130 v1.0.0. However, S130 v2.0.0 release notes say: "A range of 0 to 8 connections can be specified, one of which may be of the peripheral role type."

[Rodrigo]

Thanks, but my question is if I can build a network with more than 8 nodes

[Stefan Birnir Sverrisson]

The S120 is a central only softdevice that can maintain 8 concurrent links to 8 peripherals.

[Rodrigo]

So also S130.. and S310? S310 can maintanin more than 8 concurrent links?

[Stefan Birnir Sverrisson]

S310 is BLE+ANT softdevice. The BLE side is a perhipheral that can maintain 1 link. The ANT side can maintain at least 8 links, see the thisisant.com site. We also offer a pure ANT S210 softdevice, i.e. with no BLE.