It has been quite some time, but fresh installs into windows and Linux (Debian) all lead to blank graph screen. Have tried it with several options. I know my Arduino and the sensors are all working correctly but the tts app does not draw any graph, just a vacant black screen with the "Throttle" "Thrust" "Voltage" and other text on the top left corner. The device list displays com5 only and connects to it but not samples are displayed.