1. Is there a complete demo product?
2. Can the firmware of Nordic nRF52833 DK support AoA? It means that AoA packets can be sent out.
Thank you!
1. Is there a complete demo product?
2. Can the firmware of Nordic nRF52833 DK support AoA? It means that AoA packets can be sent out.
Thank you!
1. We don't currently have any demo products publicly available I'm afraid, but you can contact our sales department for more details as to when this might be available by filling out the Sales Related Questions form here.
2. Yes, the nRF52833 is able to transmit and receive AoA packets, but in order to do direction finding using AoA, the receiving device will need an antenna array of some sort and an AoA algorithm to receive and calculate the IQ sample data properly. You can read more on that in the nRF52833 Product Specification as well as our Direction Finding whitepaper (which describes how to configure and enable Direction finding features).
Best regards,
Simon
1. So does Nordic have no antenna array products?
2. If I buy an antenna array, as long as nRF52833 can send out CTE packets. Can I get the angle information?
1. Not at the moment. Our sales team should be able to fill you in on more details.
2. As long as you write firmware for antenna switching and an AoA algorithm that handles and calculates the incoming packets, you should be able to get angle information, yes.
Best regards,
Simon
I plan to use TI's AOA antenna array. I already own nRF52832 ev board.
I want to know how to send out AoA broadcast packets. CTE packets should be included.
I found the relevant settings in the following path. But I cannot find the DFEMODE setting in the SDK (nRF5SDK16\examples\ble_peripheral\ble_app_beacon\pca10040\s132).
infocenter.nordicsemi.com/index.jsp
White Papers > nWP036 - Direction Finding > Example configuration
Setting up the transmitter
Configure the Constant Tone Extension (CTE) to set up the Angle of Arrival (AoA) transmitter.
1. Enter DFEMODE.DFEOPMODE=3 to set the AoA mode.
2. Enter DFECTRL.NUMBEROF8US=3 to set the length of the CTE to 24 µs.
3. Enter DFECTRL.DFEINEXTENSION=1 (default) to add the CTE after the CRC.
4. Write the TX data to the RAM.
The frame shall match the required format for an advertising channel Protocol Data Unit (PDU) (CP bit set and CTEInfo=0x18).
5. If the SHORTS.READY_START register is enabled, enter TASKS_TXEN=1 to start the transmitter.
Hi
Please note that the nRF52832 does not support Direction finding, only the nRF52811, nRF52833, nRF52820 and nRF5340 support the Direction Finding feature.
The Direction Finding whitepaper I linked to in my first reply explains how to set up your advertising packet to append a CTE after the CRC on your packet. You can also check out the Direction Finding beacon example project in our nRFConnect SDK here for more of an example.
Best regards,
Simon