CTE Length nrf52833

RE: CTE Length nrf52833

Sigurd — Wed, 09 Dec 2020 19:26:08 GMT

Hi prosper,

If you are experiencing this issue with any kind of Direction finding software evaluation package sent to you by Nordic Semiconductor, then I think this(max value is 10) has been a limitation in older versions. Please create a new private ticket here at Devzone were you request the latest version.

RE: CTE Length nrf52833

Dmitry — Wed, 09 Dec 2020 11:15:47 GMT

[quote userid="77172" url="~/f/nordic-q-a/69252/cte-length-nrf52833/283926#283926"]or the transmitter, i am using nrfConnect to confirm that its advertising as AOA Beacon. When i set DFE DURATION greater than 12, the scanner will see the mac address of the device but its name is Unknown. [/quote]

Are you trying to append CTE to a regular advertising packet? This won't work as you're expecting - the master tries to query your device with scan request, but device cannot answer because it's still transmitting CTE. According to 5.1 spec, CTE packet can be appended only to extended advertising packets.

[quote userid="77172" url="~/f/nordic-q-a/69252/cte-length-nrf52833/283926#283926"]For the receiver, when i set more than 10 8us slots, the code hangs in main, on a line where its waiting for a packet from the radio.[/quote]

It's hard to say anything without looking at code...

RE: CTE Length nrf52833

prosper — Tue, 08 Dec 2020 23:18:05 GMT

For the transmitter, i am using nrfConnect to confirm that its advertising as AOA Beacon. When i set DFE DURATION greater than 12, the scanner will see the mac address of the device but its name is Unknown. I assume the packet gets big so that ble 4.2 scanner cannot recognize it.

For the receiver, when i set more than 10 8us slots, the code hangs in main, on a line where its waiting for a packet from the radio. Its exactly what happens when the transmitter is not transmitting and the locator is waiting for packets.

RE: CTE Length nrf52833

Dmitry — Tue, 08 Dec 2020 22:55:50 GMT

Hi,

Could you share your code here?

[quote userid="77172" url="~/f/nordic-q-a/69252/cte-length-nrf52833"]firstly the transmitter stops transmitting for a DFE_DURATION value greater than 10 which is (10*8)=80us.[/quote]

Are you receiving PHYEND event after 80us, or it doesn't transmit at all with that settings?

[quote userid="77172" url="~/f/nordic-q-a/69252/cte-length-nrf52833"]The receiver likewise, code hangs if i try to extend CTE or number of 8us to 20[/quote]

Also, what's happening after 96us - the receiver just stops, or hardfault? Did you allocate an array and configure MAXCNT to hold all the samples taken?