How many connections with nRF51 in peripheral role?

[Reiner]

Is it possible to establish and hold more than one connection in peripheral role? Is it possible to send advertisements simultaneously?

[Jørgen Holmefjord]

Hi,

The nRF51 series can only support one connection in the peripheral mode. In central mode, up to 8 connections is supported. If you want multiple connections as peripheral, you need to upgrade to nRF52832, which support up to 20 concurrent connections in total.

The devices are capable of doing non-connectable advertising during connection. Note that the Bluetooth specifications limits the advertising interval in this mode to 100 ms minimum.

Best regards,

Jørgen

[tke]

Hello,

Does also softdevice v2.0 (nRF52832) support multiple peripheral roles simultaneously?

[Jørgen Holmefjord]

S132 v2.0.x does not support multiple connections as a peripheral. Only S132 v4.0.x and S132 v5.0.0-2.alpha support this.

[tke]

OK, this was my understanding too. Is there information how to migrate from softdevice v2.0 to v4.0 available?

[Jørgen Holmefjord]

There are migration documents in the softdevice zip-files I linked above for S132 v3.0.0 to S132 v4.0.3. You can find migration document from S132 v2.0.0 to S132 v3.0.0 in the S132 v3.0.0 download.

[Reiner]

Is a automotive grade version available or planned for nRF52, like 824 in nRF51-Series?