Show signal strength (RSSI) in OSD (CROSSFIRE / CRSF version)
You probably ended up here because simply clicking on the “RSSI” button in the OSD menu of the Betaflight Configurator was not enough.
We’ll explain how to set it correctly and avoid common mistakes! This article describes the setting of the RSSI value only for the CRSF protocol.
A spark with Open TX
Take your spark to hand and turn on your quad bike. The CRSF module should already be plugged into your remote control and ideally connected to your racer’s receiver. We still need the SD content for Open TX.
Now switch to the settings in your spark (Taranis QX7: hold down the menu button with the 3 bars) Then we have to run on page 2 (with the “Page” button) in the subfolder “CROSSFIRE” and since the .lua Script crossfire. Now the JR module should be displayed as TX and the receiver, for example as Nano RX. Now press Enter (QX7: the round knob on the right). In the menu you can now navigate down and select the desired channel and add LQ.
The right channel: keep in mind that the first 4 channels are your control and only then come the channels that can be used elsewhere. CH 10 is then in the beta flight configurator so channel 6.
RSSI, LQ and RSSI/LQ
RSSI is for raw signal strength. However, it does not reflect the exact quality of the connection.
LQ, as Link Quality does just that: It not only tells us how strong the signal is, but also how many “healthy” data packets come about via the connection between spark and receiver. Faulty packets, which are corrupted e.g. by background noise, are also not usable and therefore the QL indicator is much more useful for us. So if we just want to know how well and quickly data is exchanged instead of flying far (in the sense of real long range), the LQ display is just right for FPV racers and freestylers.
RSSI/LQ gives us the lowest value. Nice to have, but no need.
In the Betaflight Configurator
We’d be done with the spark, but leave it on and connect your quad to the computer now. In the Betaflight Configurator, you now switch to the Tab Receiver/Receiver and selects under “RSSI channel” the channel, which we have just used the RSSI. It should already be visible at the colorful bars on the left. memory and now change in the “Setup” tab at the top. On the right side, you will now correct RSSI and should be around 99-100%. After all, the spark is probably right next to the receiver.