How to determine BLE connection quality while connected

RE: How to determine BLE connection quality while connected

Keith V — Tue, 02 Jan 2024 18:54:35 GMT

Ok, Thank you

RE: How to determine BLE connection quality while connected

hmolesworth — Tue, 02 Jan 2024 17:58:51 GMT

If using something like the Nordic Uart Service a disconnect/connect event can lose a complete packet (tested at 5 packets per second, 170 bytes per packet) without notification or indication. To avoid this requires some (user) upper-layer monitoring to request a retransmit of the lost packet. (Our experience)

RE: How to determine BLE connection quality while connected

Keith V — Tue, 02 Jan 2024 17:47:16 GMT

Thanks!

But what about lost packets? would you expect missing packets during heavy interference?

Or is something else happening?

RE: How to determine BLE connection quality while connected

AHaug — Tue, 02 Jan 2024 15:03:23 GMT

Hi again,

After discussing with my colleagues today we've concluded that the previous answer regarding using RSSI as an indicator to percieve signal strenght and to determine if there are any interference on the network. Although this is not the most reliable method, but it is maybe the most available estimation method to determine such a thing together with experimental data from monitoring and analysing a sniffer trace

Kind regards,
Andreas

RE: How to determine BLE connection quality while connected

Keith V — Wed, 27 Dec 2023 21:03:13 GMT

Thanks for the reply and the confimation. We are out till monday also.

Have a great new years

RE: How to determine BLE connection quality while connected

AHaug — Wed, 27 Dec 2023 16:37:06 GMT

Hi,

I will have to discuss this with some of my colleagues over new years (Christmas holiday period here in Norway leaves us short staffed until January).

As some initial thoughts, I support your reasoning and arguments. A good decision is to use RSSI in combination with experimental values as well as monitoring through BLE sniffer tools such as the BLE sniffer in Wireshark

But as mentioned, I will discuss this with my colleagues in January and get back to you.

Kind regards,
Andreas