Lukasz's Posts (1)

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APM RSSI 3.3V input

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For some time I wanted to add ability to provide RSSI from FrSky receiver to APM.

RSSI_PIN parameter works fine for that however some of receivers such as mine FrSky D8R-XP outputs 0 - 3.3 V. For that purpose I've added new param and called it RSSI_RANGE.
This was also issue requested before: https://github.com/diydrones/ardupilot/issues/648
After voltage rescaling it works. rxrssi is shown in scale 0-100.

And added ability to rescale in params:

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Here few pictures:

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I've used 4.7k resistor and 10uF capacitor to filter pulse signal coming from receiver's RSSI output.

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Hope this helps anyone.


Lukasz

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