This app is intended to be used with "Pitlab & Zbig FPV System".

Firstly, turn on this app and connect to the GroundStation or OSD similarly as you would do in "FPV Tracker" app.

You should receive lines of data started with $ sign and consisting only with numbers and alphabet letters. If this is true, the transmission is probably correct.

If you see data not starting with $ sign or consisting of unusual signs, the transmission is incorrect. You should check your system's Bluetooth baud rate. It should be set to 9600 bps. If you set the baud rate properly and the problem still exist, please take a screenshot of the received data and report this problem to us via email.
If you don't know how to take screenshot, check your device's manual.