On the Github yaapu pages I’ve found folders MODELS/yaapu, SOUNDS/yaapu0, and README.md which in turn tells me to “copy the content of this folder to your radio SD card”. The H743 schematic tells me to connect my Rx SmartPort to the Tx4 pad, so that seems quite straightforward. My FCs are mRo R15 in one heli, and Matek H743 in two other helis. My transmitter is FrSky Taranis 9D+2019, and my receivers are FrSky X-series. I’ve been reading the wiki and other sources and have got some way in my understanding, but could do with some more-specific directions. In a couple of my threads on this forum I’ve been advised to install Yaapu to give me basic ground station data from my helis.