Is the RFD900x PPM feature documented anywhere for use with the APM telemetry link?
I am only finding “bits and pieces” on the APM forums. It seems like it would be a good promotion for APM to integrate both R/C and Telemetry into a single wireless link that has less latency than the current Joystick/Gamepad via Mission Planner.
I don’t fly a taranis, but it’s easy to check what max voltage/s your transmitter output/s on it’s PPM output with something like an ocilloscope or similar. You can then match that to the RFD900X PPM input ( which is 3.3v rated) by choosing two suitable resistors. ( a resistor divider is a very common approach, and very cheap and easy and flexible. ) . google knows more if you don’t.
Thanks for the link. I agree with your “holy grail” goal but the current solutions seem to be pricey and lack the distance.
At this point, I have been using 900MHz for Telemetry, 2.4GHz for R/C, and 5.8GHz for video. Combining Telemetry and R/C at 900MHz in the US would be sweet but I’m also open to using the ULRS. I’m curious if the video distance greatly increases using the licensed 1.3GHz band over the 2.4GHz or 5.8GHz bands. I suspect it does…
I definitely recommend ULRS. It is dirt cheap to play with and will certainly get you out 5 miles with a reasonable set of antennas. But as you note I have my amateur radio license and that can be a problem for someone wanted to follow all the laws. Not very many of those in RC;)
1.3g is definitely going to be less line of site for you. The nice thing about ULRS at 433mhz is being able to use 2.4ghz for video. For me it is the perfect combo. 2.4ghz for better long range video yet antennas that are a lot smaller than 1.3ghz.