Beacon scenario

RE: Beacon scenario

endnode — Wed, 07 Jun 2017 09:47:54 GMT

Btw. I've found one older study (Thesis) showing how doomed RSSI is for indoor location positioning unless you invest years and millions of dollars in effort and SW to it.

RE: Beacon scenario

endnode — Wed, 29 Mar 2017 13:23:29 GMT

Yes, there are. I get 20 results straight ahead when doing Google search, I'm sure you will find more.

RE: Beacon scenario

Wojtek — Wed, 29 Mar 2017 13:22:40 GMT

You can increasy accuracy by something like: room with lots of beacons in defined positions with quite low advertising interval and low power. Then you scan it and you know the position quite accuratly. You are welcome, you just saved thousands of dollar worth research :D May i send you my paypal address? About companies - yes, there is ex. estimote. Their locating ability is quite poor in my opinion however, but still... You can make them offer so they will share algorithms with You.

RE: Beacon scenario

Usman Rashid — Wed, 29 Mar 2017 13:21:05 GMT

But what could I take as an starting point? Is there any companies which already did this thing ???

RE: Beacon scenario

endnode — Wed, 29 Mar 2017 13:19:43 GMT

The only reasonable approach is to do your own research.

RE: Beacon scenario

Usman Rashid — Wed, 29 Mar 2017 13:18:21 GMT

So how accuracy can be increased is there any kind of parameters which we need to check ?

Or the best solution could be to perform measurements in different scenarios and analyze the results ???

What would be your recommendation based on your experience ?

RE: Beacon scenario

endnode — Wed, 29 Mar 2017 13:15:27 GMT

Yes, that's correct.

RE: Beacon scenario

Usman Rashid — Wed, 29 Mar 2017 13:14:13 GMT

Basically, what I understood so far that it is possible to find the location using beacon based on RSSI values but it is not accurate because of nature of bluetooth signals ?

RE: Beacon scenario

Wojtek — Wed, 29 Mar 2017 13:09:12 GMT

You could have forgotten about that, it was a week ago... ;) devzone.nordicsemi.com/.../

RE: Beacon scenario

Usman Rashid — Wed, 29 Mar 2017 13:07:56 GMT

I do not know where I have asked before?

RE: Beacon scenario

Wojtek — Wed, 29 Mar 2017 12:57:46 GMT

You can open the case on the "my page" section on nordic website, it will go straight to nordic employees. I doubt they will give you better answer for that however, as it is just not possible to provide general solution. Oh, I see you already asked same question before, and you got the answer from Sigurd who is Nordic employee. I would not expect asking the same question more times could cause the answer to turn out different...

RE: Beacon scenario

Usman Rashid — Wed, 29 Mar 2017 12:56:40 GMT

Sorry, I want to ask this question from nordic representatives

RE: Beacon scenario

Wojtek — Wed, 29 Mar 2017 12:55:41 GMT

This is open forum, anyone can answer. Nordic employees can be recognized by the "Nordic employee" text under name. No, SDK don't have such feature as calculating location/distance basing on RSSI.

RE: Beacon scenario

Usman Rashid — Wed, 29 Mar 2017 12:54:25 GMT

Sorry you are not nordic representative ?

RE: Beacon scenario

endnode — Wed, 29 Mar 2017 12:40:20 GMT

What do you mean by "heavy lifting"? There are no know algorithms how to solve "indoors location from single observer" problem. All working solutions are based on multiple observers and heavy processing in the back-end. (and the SDK is Nordics', not mine;)

RE: Beacon scenario

Usman Rashid — Wed, 29 Mar 2017 12:34:54 GMT

Determine the distance from beacons is not impossible, but it is a quite hard task due to the nature of Bluetooth signal itself and how phone actually measures the signal to the phone.

Does your SDK does all the heavy lifting for us- processing the signals and combining them using algorithms developed by you??

RE: Beacon scenario

Usman Rashid — Wed, 29 Mar 2017 11:54:10 GMT

Assumption like what ? Can I make app in the phone which can calculate distance based on RSSI values ? Also can tell approximately how far I am from other beacons which are connected at that time ?

Can you tell me in short about those assumptions ?

RE: Beacon scenario

endnode — Wed, 29 Mar 2017 11:50:58 GMT

Well you can do it in scenario of multiple beacons (radio sources) and known topology but it's really complex task and you need to fulfill many assumptions...

RE: Beacon scenario

Wojtek — Wed, 29 Mar 2017 11:41:33 GMT

You cannot simply convert RSSI to location/distance, as you don't know the performance of the antenna of the transmitter (beacon) and the receiver (phone). You could have a look on nRF Beacon app to see how typical beacon app works.

RE: Beacon scenario

Usman Rashid — Wed, 29 Mar 2017 11:34:42 GMT

Alright! so do you have any ready made program or app which can calculate location based on RSSI values and can tell how far I am from other beacon ?

I think accuracy depends on many factors.

RE: Beacon scenario

endnode — Wed, 29 Mar 2017 11:31:18 GMT

In general yes. The question is "how accurate you can get" and the answer to that is worth a book and several million USD business;)