BLE indoor stability improvements

RE: BLE indoor stability improvements

ovrebekk — Mon, 03 Jul 2023 10:45:22 GMT

Do you know what connection parameters you are getting in the end?

What you request is min and max, and the phone will pick something in between.

Do you see improved performance if you try to pick more aggressive connection parameters, such as min 10ms, max 30ms?

Do you have a Bluetooth sniffer available so you can try to sniff the communication between the iOS device and the nRF?

Best regards
Torbjørn

RE: BLE indoor stability improvements

EtienneLJ — Fri, 30 Jun 2023 10:31:25 GMT

Our main concern is the stability between iOS device and NRF52832 peripheral.

It's a custom design, and we've didn't have it reviewed. As our device is under production we can't modify hardware...

NRF52832 parameters:

- Min connection interval : 15ms

- Max connection interval: 150ms

- Connection supervision timeout: 4s

It seems that with an android phone connection stability is much better.

RE: BLE indoor stability improvements

ovrebekk — Fri, 30 Jun 2023 09:05:00 GMT

Do you know which link is struggling?
Is it the nRF52 to nRF52 link, the nRF52 to iOS link, or both?

Are your devices based on custom hardware or devkits?
In case it is custom hardware, has the hardware been reviewed by us and tuned for optimal performance?

Which connection parameters are you using for the two links?
The choice of connection parameters can affect the link robustness. In general a smaller connection interval and a longer connection supervision timeout will lead to a more stable link.

Also, ensure that you are using the maximum output power supported by the SoC (+4dBm in the case of the nRF52832).

Best regards
Torbjørn