What does the leftright arrow next to signal strength in nrf Connect App means?

[Parag Thakkar]

Hi

In nrf Connect APp for mobile what does the leftright arrow next to the signal strength means (103ms in the below image)?

[Benjamin]

Hi Parag,

This is advertising interval.

The value is calculated from the timestamps of received packets, using averaging and ignoring unusually large intervals (assuming missed packet). Advertising packets are sent on three channels (31, 32, and 33), so the measured interval can vary depending on the channel sequence.

This means the result is an approximation.

Best regards,
Benjamin

[Parag Thakkar]

Hi Benjamin

Thanks for the information. In my case the ble device I am developing I am getting an advertising interval of 800ms (even though it is defined as 211ms in my code) for signal strength of -70dBm (approx) where as another device (i.e epson printer) with same signal strength is having advertising interval of around 110ms (it remains same with better signal strength as well).

If i bring my device closer with signal strength of around -50dBm then i get the advertising interval same as 211 ms as per my code.

I am checking this in nrf Connect App.

So should the advertisement interval change with signal strength?

[Benjamin]

If you tap on the scanned device you can see exact timings. What do you receive here?

Benjamin