Can central multi-link connect to several peripherals with App_Uart?

[Avi]

Will it be possible to get data from several (20) peripherals which have App_UART to the single Multi-Link central?

[Jørgen Holmefjord]

Hi,

When you say "App_UART", do you mean the ble_app_uart BLE peripheral example, or the app_uart library for hardware UART communication?

If you are talking about BLE, there is a ble_app_uart_c multilink example available on GitHub. This is configured to support 4 concurrent connections, but it should be possible to increase this to the 20 links supported by the softdevice. You may need to increase the connection interval quite a lot when having that many connections, please see the scheduling chapter in the softdevice documentation.

Best regards,
Jørgen

[Avi]

Great! I will take a look

Thanks a lot

Avi

[Avi]

Taking this forward...

Is it possible to configure the following structure (as described in the picture below):

1) Several Nordic acting as nrf_uart_app converting the status of the logic they are connected too, into set of UART messages

2) A multilink Nordic device "listen" to all these devices (via BLE) and connected to a multiperipheral Nordic device via UART line (TxRx)

3) Several smartphones with nrf Uart apk, connected to the multiperipheral device and get the information from all the Logic circuits (in real time)

[Jørgen Holmefjord]

There is nothing technically preventing you from doing what you have shown in the diagram. However, it depends on your requirements for "real-time". With two BLE links, one HW UART link, and multiple connections being services on both ends, the latency between the circuits and the phones will not be negligible.