I have a FrSky receiver with an RSSI output. I think APM will accept analog RSSI but the FrSky instructions say that is PWM type RSSI. I don’t want to burn out my APM. Will it work or not?
.
You need to be a member of diydrones to add comments!
This reply was deleted.
Replies
Hi, software issues aside, you can probably connect the RSSI if you feed it through a low pass filter. The last time I looked at the FrSky RSSI signal, is was fast and modulated enough for that.
From the receivers RSSI output, feed it to a 10KOhm resistor. At the other end of the resistor, connect it it a 47uF capacitor whose other end goes to GND. From the resistor/capacitor joint, add an 1kOhm resistor and from that go to an analog input of the APM.
(the 10k and the capacitor are the filter. The 1k resistor prevents the capacitor from emptying its charge into the APMs port too fast when the system is powered off)
Regards
Soren
I think rssi doesn't work at the moment unless you upload the code yourself. Something about a conflict with the motors LEDs. There is something somewhere in the massive 2.9.1 release thread i believe.