How to get RSSI displayed on Mission Planner

Ground Control Software Mission Planner
1

I have got a pixhawk lite FC and a Frsky L9R receiver which outputs an analog voltage in the range of 0-3.3V to indicate the RSSI. I have checked with a multimeter that the RSSI output of the receiver is working

I have done all the procedures in this webpage http://ardupilot.org/copter/docs/common-rssi-received-signal-strength-indication.html The RSSI signal is connected to the S.Bus port of the pixhawk. The parameter settings are RSSI_PIN = 5 and RSSI_RANGE=3.3 as indicated in the webpage but I did not get any RSSI text in the flight data screen of Mission Planner at the location indicated below :

http://ardupilot.org/copter/_images/mp_hud_rssi.jpg

In the “status” window of the flight data screen of Mission Planner, the value of the rxrssi parameter is zero. May I know if there are anything that I have done wrong ?

2

first you should tell us the version of the firmware.Any you can upload the config file of your hawk.

3

Also. Did you add the filter resistor and capacitor as described in the link? The Receiver actually outputs a digital signal using Pulse Width Modulation. The RC Low Pass Filter smooths out the input pulses to produce a reasonably smooth analog output, to be read by the Pixhawk

This is a step that some people trying to use the FRSky RSSI miss.

4

Thanks for all the replies. It is found that the value of RSSI_PIN should be set to 103 instead of 5 in order to get it work.

5

I have a receiver outputs SBUS to a Navio2 running ArduCopter 3.4.5. I mapped the receiver’s RSSI value onto channel 9 of the SBUS stream.

I set Mission Planner parameters as follows:

RSSI_CHANNEL = 9
RSSI_TYPE = 2 (PWM Value)

When I configure the rssi user item to show in the HUD, it only shows a zero (0).

Please let me know if I am missing something.

Thanks,

Paul