Has anyone observed odd behavior when using additional telemetry devices with the controller? I have the Seeeduino controller daisy chained with an Advanced Telematics AT-V1 RPM/Temp/Volt board. The AT-V1 uses an Arduino Pro Mini board. I have used the AT-V1 in several airplanes and works fine with other FrSky Telemetry devices
When both devices are connected, the controller pulse width measurements are very noisy, changing as much as 600 us. I have been trying resolute this issue with averaging and using other measurement methods. I accidently discovered if I remove the AT-V1 everything works as expected. In the setup I am using the AT-V1 is powered from the radio, power, ground and SPOT wire, the controller is powered from the USB plug, the positive wire is removed from the RC Channel plug and a single SPORT wire is connected to the AT-V1.
I was able to rewrite the code on the AT-V1 use the SPORT library but have yet to try that combination.