How to use AoA and Nordic Distance Measurement library at the same time

RE: How to use AoA and Nordic Distance Measurement library at the same time

loquat — Fri, 10 Jan 2025 06:38:30 GMT

OK.Thanks.

RE: How to use AoA and Nordic Distance Measurement library at the same time

Simonr — Tue, 07 Jan 2025 15:37:38 GMT

Thank you for the description, this is helpful. I'm afraid that a Mesh network with AoA or the Nordic Distance measurement library is not supported, as these are outside of the specifications of Bluetooth Mesh. However, it might be possible to have AoA coexist with a Mesh network at least, so that when in range, the devices switch to Bluetooth LE and AoA for this multi-antenna near the gate. However combining both Distance Measurement and AoA is tough to get the room for on any of our devices, but if any, the nRF5340 would be the best suited. The amount of RAM and Flash memory might be a limiting factor.

Best regards,

Simon

RE: How to use AoA and Nordic Distance Measurement library at the same time

loquat — Tue, 24 Dec 2024 10:44:52 GMT

OK.Thanks.

Our goal is to use a completely cordless mesh network to measure positioning and collect sensor information.

Each device is battery-powered.

They can be placed anywhere (within the range where mesh communication is possible).

First, the distance between each device is measured to determine the location of the placed device.

There is also a special device (multi-antenna) that is placed at the entrance to the gate.

To tags approaching the gate from a specific direction, information according to the direction (including the distance from the gate) is sent

Then, when a certain distance is reached, an instruction is issued to stop.

This is the system we want to realize. (Specific objectives will not be described as they are confidential.)

RE: How to use AoA and Nordic Distance Measurement library at the same time

Simonr — Fri, 20 Dec 2024 13:43:11 GMT

Please indulge me then. Try explaining what you're planning on doing, and in what terms you need the two to work at the same time? Since the nRF5340 only has one radio, so doing two different operations at the same exact time won't be doable. But switching between them should be.

Please let me know what I can do to help you, and I'll do my best! Note that the holiday season is inbound in Norway, so delays in replies must be expected until the 2nd of January.

Happy Holidays!

Simon

RE: How to use AoA and Nordic Distance Measurement library at the same time

loquat — Thu, 19 Dec 2024 22:31:42 GMT

Thanks.

-------------------------------

Of course.

1. Between tags and locators
We want to know the presence of tags approaching from a specific direction. This can be achieved with one locator.

2. When multiple locators are placed
By knowing the distance between locators, the position of the locator can be identified. This is effective when the locator moves.

We dream of a more advanced system than you can imagine. To achieve this, we need to combine each function.

Even if each function can be realized individually, the dream will not come true.

We would like your cooperation in making our dream come true.

RE: How to use AoA and Nordic Distance Measurement library at the same time

Simonr — Thu, 19 Dec 2024 13:19:50 GMT

For Direction Finding (AOA) Only the nRF52833 and nRF5340 is supported. And the nRF5340 is the one with the largest amount of RAM/Flash, which might be a hurdle when combining applications like Mike@PebbleStack points out here. Additionally, you would indeed have to switch between the two as you can't run ranging with DM simultaneously as you do an AOA ranging.

It is indeed also worth checking out the channel sounding which is new, and within the Bluetooth specification, although it is only supported by the nRF54L15.

Is there a specific reason you will need both Direction Finding and Distance Measurement for your ranging application?

Best regards,

Simon

RE: How to use AoA and Nordic Distance Measurement library at the same time

Mike@PebbleStack — Thu, 19 Dec 2024 00:03:17 GMT

Have you tried using the AI? It's really good at finding similar questions and suggesting answers from previous replies.

Based on the knowledge sources provided, I can recommend the following for using both Angle of Arrival (AoA) and Nordic Distance Measurement library:

For SoC recommendation, the nRF5340 would be the best choice. Here's why:

AoA Support: The nRF5340 supports Bluetooth Direction Finding, including AoA. This is confirmed in the Bluetooth Direction Finding product page.
Nordic Distance Measurement Support: The nRF5340, being part of the nRF53 Series, supports the Nordic Distance Measurement library. This is mentioned in the Nordic Distance Toolbox documentation.
Dual-core Architecture: The nRF5340's dual-core architecture allows for efficient use of both features. You can perform distance measurements on the network core and do calculations on the application core for better performance.

However, it's important to note a few things:

These features may not be usable simultaneously in a single application due to resource constraints. You might need to switch between AoA and Distance Measurement modes.
The Nordic Distance Toolbox is a proprietary solution and an alternative to Channel Sounding, offering advanced distance measurements using Phase-Based Ranging (PBR) and Round-Trip Time (RTT) methods.
For implementation details, you should refer to the specific samples and documentation for each feature in the nRF Connect SDK.

Remember to check the latest documentation and SDK versions for the most up-to-date information on using these features together.

Just remember it's AI....so verify everything before you make a decision!