I am using the GoogleMaps API for device location and this working nicely. I was wondering with the BLE based Mesh whether it would be possible to locate devices more accurately in relation to the gateway device - a bit like differential GPS. What I am trying to do is locate devices within +/- 1 metre within an office space. I have seen BLE based beacons that can locate accurately within a building.
Just to clarify, the new generation isn’t using Bluetooth for mesh, but rather OpenThread. Not sure if that makes a difference for your application though.
If you know the physical location of your devices, I guess you could try triangulating items based on signal strength, though interference (walls), might be problematic.
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@Moors7, Thanks for the correction 802.15.4 rather than Bluetooth. This was what I had in mind:
They claim 3 metre accuracy which would be OK. I guess a better question is: Does openThread have some sort of location service, or could this be developed?
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I’m not quite sure if the protocol provides anything for this, but it seems as though the document you mention above is based on the same principles I mentioned in my previous post. Known, fixed location nodes, triangulating location based on signal strengths.
You could simplify this by placing a node in every room, and simply assuming the person is in the room which has a node with the strongest signal. It would reduce accuracy, but also greatly reduce complexity.