Multilink peripheral RAM settings

[Martin Kulessa]

Hi, i try to establish a communication between 3 sensors in the following way!

Node 1 should broadcast messages to Node 2 and Node 3 as Peripheral. To establish a connection now between Node 1 and Node 2, Node 2 acts as central and connects to Node 3 as a seconde peripheral device!

First of all is it possible to use the Multiperipheral on nRF51422 or just on nRF52 series?

Second how do i have to extend the RAM to use a second Peripheral based on ble_nus_uart app peripheral?

[Petter Myhre]

The latest version of the S130 SoftDevice, for the nRF51, does not support multiperipheral, so your suggested topology is not possible.

Node 1 can be connected to Node 2 as a central, and to Node 3 as a peripheral.

Node 2 can be connected to Node 3 as a central, and to Node 1 as a peripheral.

Node 3 can be connected to Node 1 as a central, and to Node 2 as a peripheral.

[Petter Myhre]

Extending the RAM for the SoftDevice alone doesn't really help, but you do it by chaining RAM start and RAM size in your project settings. You have to modify the example so that it supports two peripheral connections at the same time. We don't really have an official example, but I made an example for S132 4.0.0-2.alpha that might be helpful. You can find it here.