The CTE(Constant Tone Extension feature used on the DTM(Direct Test Mode) with Nrf5340

[seanchang]

Hello,

I am using Nrf5340 with “Direct test mode” example.

I try to make my nrf5340 kits to be an AoD receiver under the DTM.

Now,I am able to run the example code to receive the packet that without CTE signals,

but I can not receive the packet with CTE signals.

 

Does the example “Direct test mode” not support AoD/AoA case?

Is there something Im missing here?

Any help/comments will be appreciated!!

Thanks in advance,

sean

[Elfving]

Hey Sean!

AoA/AoD is sadly not supported by DTM, though it will be supported in nRF Connect SDK DTM eventually!

This is mainly due to our DTM using TWI, over which AoA/AoD is not supported. Getting TX working is easy as you only need to enable the CTE. With RX however you need to have a path for the data to transfer through, which the TWI doesn't support.

Best regards,

Elfving

[seanchang]

Hi Elfving,
thank you for your reply!

I am confused about the description in the nRF Connect SDK 1.7.0 (bluetooth-direction-finding-support)
that "The DTM sample supports all Bluetooth Direction Finding modes specified in DTM".
Is it not implemented yet or it just supported CTE tx only?
Thank you for all your assistance!

BRs

Sean

[Elfving]

Hey again Sean!

Yes, I can imagine that wording being a bit confusing. I am a little uncertain about what was meant there myself. However it does only support TX as of now. 

Best regards,

Elfving

[seanchang]

Hi Elfving,

thank you for your answer again!
that made me figure it out.

Could you provide some information about when will nRF connect sdk support CTE Rx in DTM?
Thank you for all your assistance exactly!
 

BRs

Sean

[Elfving]

seanchang said:

Could you provide some information about when will nRF connect sdk support CTE Rx in DTM?

No, I am afraid I can't. Sorry about that.

Best regards,

Elfving