Problem with external Bluetooth GPS

Hi,
I used to connect an external BT GPS HOLUX GR230 when Hiking to incresease authonomy and this was working well.
The GR230 gone dead
I bought a new GT750F (see link below)

http://www.fantech-electron.com/enu/product/view/gt-750f.htm

With this one, each time I start ORUXMAPs, I only receive a single first point, and after this point, nothing.
If I stop, and restart, i get another single point and that's all.

If I use "Bluetooth GPS Provider" and select "start GPS" instead of "Start External GPS", then it's ok.


https://play.google.com/store/apps/details?id=de.mobilej.btgps&hl=gb


Is there a way to avoid using GPS provider

Waiting your answer