Hello. I am using develpment kit and I would like to know if it is possible to set configurations different to the ones we have in the user manual.
What I would like to do is to create a line of anchors (receivers) separated betwen them 30-40 meters and 2 tags (which have a constant distance between them) transmiting.
Idea is not to position de tags in x,y,z. I only need the distance between each tag to same anchor. (see in the picture Tag F and Tag B to anchor 1)
Anchors will have a very well known position in the space.
How is the best way to achieve it???
I am using MDEK deveopment kit but I am open to buy any other equipment if necesary
Hi @kevindapollo , I think my response here could also be applied in this use case. Please review and let me know.
If you have many anchors, it would be good to have an out of band communication to know which anchors are nearby to you. If only having a few anchors, then you could brute force attempt to range to all of them and see which ones give you a response.
There is no need for an out of band method to work out which anchors to use. You know where the anchors are (they are fixed). You know where the tag is (that’s the whole point of the system). You can work out which anchors to use based on that without the need for any external links.
If there are 100 anchors, how will the tag know which anchor to try to range with? It can try to range to all of them individually but that would be inefficient.
If you don’t know where you are you can have a roll call type radio message that all anchors in range reply to.
Or you can have a pre-defined list of geographically diverse anchors such that one of them will be in range anywhere in the area. That first round may only give you one anchor but that will give you an approximate area. A second round of ranging centred in that area will get you more anchors and an approximate location. By the 3rd round of ranging you’re probably on the optimal set of anchors.
The second method with a few refinements is how our system works. We have installs that are over 400m long, you can power up anywhere in the area and from the radio first starting to using the final set of anchors for the current location takes around 20 ms.
None of this is new, complex or difficult to implement. And it’s a lot cheaper than adding extra hardware and the server side infrastructure that a second radio would require.
Our system consists of the anchors and the tags, no extra computers or equipment needed when running (some needed for setup to survey & configure) . All the anchors and tags require is power, no extra cables or connections other than the position output feed from the tag.
