Building Built Area Calculation with ODK Sensors

Guys

I was on the original formhub team and understand how ODK works. So I am asking a new system problem related to ODK sensor.

I want to use ODK inside a building to calculate the built area. GPS does not work inside a building and for this I understand that I need to deploy triangulation equipment.

I have seen this thread but it’s kinda old: https://forum.getodk.org/t/single-read-gps-data-from-bluetooth-gps-dongle-with-odk-sensors-framework/2919

Well I understand that I need to deploy three different bluetooth GPS dongle and calculate the relative position using GPS triangulation algorithms which are already developed.

Now I wonder has anyone tried doing this with ODK Sensor - where I get the relative positions of building edges and export the data. This I will later use to build CAD designs using fractal based algorithms that we have developed.

Has anyone tried doing this with ODK Sensor yet.

Best
Arindam