Summary:
For an x4r and Taranis you need to map the RSSI telemetry value to an unused channel and send it back up in the RC control signal. Cleanflight/Betaflight is configured to recognize that channel as the RSSI value which is then included in data sent to OSD's from the FC. (Credit to Andrew Baum)
INSTRUCTIONS in link below. Thanks Ocie Ward for the link!
https://oscarliang.com/rssi-ppm-channel-taranis/
ONCE RSSI is working as described above:
Go into the OSD through the goggles/radio and with the latest core pro beta V1.49. Go to the OSD menu, select PPM as RSSI source, choose the right channel and do the calibration. (Credit to Remo Masina)
Calibration steps:
I just figured it out.
Following the manual:
Step 1 - Turn on the R/C transmitter and move the radio 1-2 meters away from the R/C receiver,
select Calibration and press Enter to set the Max. value (best signal)
• Step 2 - Turn off the R/C transmitter and press Enter to set the Min. value (no signal)
What I found actually works.
Step 1- Turn on both RC Radio and RC Receiver and of course your display (fatshark goggles).
Step 2- Go into the Core Pro OSD by holding the radio stick to the bottom left and choose on-screen display
Step 3- Chose RSSI and setup PPM, correct Channel and then calibrate.
Step 4- Radio stick over to the right (enter) and and then turn off radio.
Step 5- Wait a few seconds and then turn off RC Receiver (quad)
Step 6- Plug the quad back in and then turn your radio back on and the correct or close RSSI signal strength should be showing in the OSD.
Alternatively you can try the method below which worked for Gaming isnotacrime :
Enter OSD and move the radio close to the receiver as close to 2011 max RSSI, then let the quad sit and walk away a distance with radio in hand until you see RSSI going to its lowest which is around 1500. Next move the stick (enter) and done! RSSI on the OSD will then reflects an accurate RSSI displayed.
