Android Agriculture GPS guidance NMEA sentences with bluetooth -- 3

I need to develop an Nmea navigation application in which it receives nmea data from an external antenna via bluetooth and tells us the direction in the application.

tractor is not real
is tractor in aplicattion
make in unity
it is real tractor tracking app
so in your app, according to the user's location, the tractor of the app will move in the screen(application).

Exemples.

https://play.google.com/store/apps/details?id=com.agri_info_design.AgriBusNavi&hl=pt_BR
https://play.google.com/store/apps/details?id=agropilot.app&hl=pt_BR
https://play.google.com/store/apps/details?id=hu.zbertok.machineryguide&hl=pt_BR
https://play.google.com/store/apps/details?id=com.kmware.efarmer&hl=pt_BR