SOARTRONIC OTG1 how to.

Connect 12v power line to the 12v and GND solder pads or use RJ45 cable with 12v.

Use the normal IGC 1:1 RJ cable for FLARM. 

Install XCSOAR and go system on start screen, select enable usb-otg.

Set up xcsoar as usual, ie. For example Flarm: go devices, select port ttyUSB0 , Driver Flarm. Baudrate 19200. 

When everything is working the way you want, use shrink tube to protect otg1 against short circuit .