Possibility to disabling native AFH function and using our own frequency hopping algorithm

RE: Possibility to disabling native AFH function and using our own frequency hopping algorithm

Sigurd — Tue, 11 Apr 2023 13:52:51 GMT

Hi,

If you are using the SoftDevice, you can use e.g. the function sd_ble_gap_rssi_get().

If you are not using the SoftDevice, you can access the radio register directly to get the RSSI. See this link: https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.nrf52832.ps.v1.1%2Fradio.html&cp=5_2_0_22_9&anchor=rssi

RE: Possibility to disabling native AFH function and using our own frequency hopping algorithm

Panzerp — Tue, 11 Apr 2023 12:32:43 GMT

Thanks a lot.

If I don't use th Bluetooth protocol stack ,just use the 2.4G communication module.

Is it possiple to get the RSSI index from different channels without protocol API? For exemple,directly get the RSSI from related registers.

RE: Possibility to disabling native AFH function and using our own frequency hopping algorithm

Sigurd — Tue, 11 Apr 2023 11:43:52 GMT

Hi,

[quote user=""]1. Is it possible to modify the channel map and update it in 1 second or less? If there's any constraint when updating channel map?[/quote]

That should be possible. The Central decide the channel map.

[quote user=""]2. Is it possible to modify channel hopping sequence using nrf52 series with nordiac protocol stack?[/quote]

No. The stack uses the Bluetooth SIG defined Channel Selection Algorithm (CSA #2) for the channel hop selection.

[quote user=""]I am developing a frequency hopping algorithm, including RSSI based channel evaluation and frequency hopping sequence generation. In my project, a nrf52840 device is used as master and 2 nrf52832 devices used as slaves.[/quote]

There is an unofficial example for this here: https://github.com/jimmywong2003/nrf52-central-channel-map-update-with-survey