What is indoor positioning?

It’s the ability of the Crownstones to know where you are if you carry a smart device with you. Crownstones use the position of this smart device through measuring Bluetooth Low Energy signals. This makes it possible for the Crownstones to react upon your presence and proximity.


Requirements for indoor positioning

To enable indoor positioning in your Crownstones the following is required:


  • To have a minimum of 4 Crownstones in the same sphere. The localization works best with at least two Crownstones per room.
  • To train the Crownstones by walking a few rounds in a specific room.
  • To have bluetooth enabled in your smartphone.

The basics

Broadcasting distance


Expect a Crownstone to broadcast 5-10m to contribute to the indoor positioning



Try to have most places covered by around 4 Crownstones. Most often 2 Crownstones per room gives enough info to the classifier.

minimum number of devices



The classifier is a room-based and uses fingerprints. An accuracy “in meters” does not reflect this.


Latency is also important


More Crownstones means fewer misclassifications which means algorithms can make their decisions faster.



scenario 1

You sit on the couch and it is getting dark

The lights in the room where you are can be turned on automatically. Presence information is needed to avoid lights going on even if you are not there!

scenario 2

Go to bed without worries

Forget about manually turning off stuff before going to bed. Lights and devices can be automatically turned off when you are not present in a room and after a certain time.

scenario 3

Because always it's better safe than sorry

Turning off outlets when an adult is not around gives peace of mind! Specially knowing that no one can play with it in a dangerous manner.

How accurate is it?

The accuracy depends on several factors, such as:


  • The quality of the training
  • The number of Crownstones and their location
  • The presence of metal appliances
  • The presence of people themselves

To know more details about each of these factors, we recommend you read this blog post.


Learn more about indoor positioning