BLE long range is not working steadily

RE: BLE long range is not working steadily

Sigurd — Fri, 20 Aug 2021 08:36:40 GMT

Hi,

It cannot be guaranteed that you pick up all beacon packets, regardless of PHY.

Even if scan interval==scan window, there is a chance that the packet is sent when the radio is busy switching to a new channel to scan on. For Coded PHY, the packet takes longer to send (each data bit is represented 8 symbols), so it could be more effect by this than 1M PHY. You also have RF interference, and that the radio could be busy processing other beacon packets it might be receiving at the same time.

RE: BLE long range is not working steadily

RichardHdrd — Mon, 09 Aug 2021 07:38:52 GMT

Hi Sigurd,

Yes, I set the ble_gap_scan_params_t::timeout to 0. The interval and window are both set to 160, which works in normal 1MBit mode to see a continuous beacon reception.

By stating, that I drop beacons, I meant, that I have a BLE sender that emits a beacon every second; so I'd expect the scanner to report a received beacon once every second - and it does in 1Mbit mode. But when I switch to phy-code, I sometimes see beacon reception pausing for some seconds.

Best regards,

Richard

RE: BLE long range is not working steadily

Sigurd — Mon, 02 Aug 2021 17:50:56 GMT

Hi,

What did you set ble_gap_scan_params_t::timeout to? 0?

What scan interval and scan window are you using?

[quote user=""]but it seems I drop beacons.[/quote]

How are you measuring this?