Hello, I am trying to connect three vehicles (quads running Arducopter on Pixhawk Cubes) to QGroundControl using RFD868ux radios. The radios are running standard point to point firmware so I have three pairs. The ground radios are connected to a desktop via USB hub.
So, to begin with, with default settings (only difference is NetIDs which are unique to each pair and the SYSID_THISMAV param, which is unique to each Pixhawk) the performance is horrible. A single vehicle is OK. With two, some commands get dropped and you can tell the difference but it’s kind of OK. With three, forget about it, a command might get through occasionally but by and large, it’s hopeless.
I have searched online but cannot find anything on what settings are best for such a setup. I have fiddled around and got somewhat better results by doing the following but have found nothing really definitive yet:
- Increasing hopping channels (default is 1, increased to 7).
- Shortening the duty cycle (default is 100%, shortened it to 10%)
I am also considering:
- Adding Listen Before Talk (not sure what value).
- Manually assigning a unique frequency range to each pair.
- Perhaps flashing with multipoint firmware.
Before I go fumbling blindly, does anyone have any tips on what settings to play with? The RFD radios have astonishing performance when used in a single vehicle and I 'm sure using them in multi-vehicle setups couldn’t be that hard.