RE: The max connect device number of nRF51 s130 sdk9.0

Jørgen Holmefjord — Fri, 23 Mar 2018 08:34:19 GMT

Hi,

SDK v9.0.0 have support for s130 v1.0.0 softdevice. This is from the s130 SDS v1.0 (chapter 1):

The S130 SoftDevice is a Bluetooth® Low Energy (BLE) central and peripheral protocol stack solution. It supports up to three connections as a central, one connection as a peripheral, an observer, and a broadcaster all running concurrently.

If you upgrade the SDK to SDK 11.0.0 or preferably latest SDK 12.3.0, this supports s130 v2.0.x softdevice. From s130 SDS v2.0 (chapter 1):

The S130 SoftDevice is a Bluetooth® low energy (BLE) Central and Peripheral protocol stack solution. It supports up to eight connections with an additional Observer and a Broadcaster role all running concurrently.

And from chapter 11.4 (BLE role configuration):

The SoftDevice can be configured with one connections as a Peripheral and up to eight connections as a Central. The SoftDevice supports running one Advertiser or Broadcaster and one Scanner or Observer concurrently with the BLE connections.

If you need even more connections, you can upgrade to nRF52832/nRF52840, where the softdevices support up to 20 concurrent connections in any role.

Best regards,
Jørgen