Hi everyone
I installed Betafpv SuperD 868 MHz receiver on my quad. My radio is RadioMaster GX12 and it's set to 100mW power and 100 MHz packet rate. My RSSI value drops below -90 after 200m. At 900m it drops under -100 and when I turn the quad towards home it suddenly drops to -112. Link quality is always at 100. With clear LOS this seems abnormal. When I put the RX and TX 1m apart, at 10mW RSSI values on the radio telemetry show around -55. I tried the same with another quad which has Frsky R9MX reciever, the value was around -24. Any idea about what the issue might be?
#Low RSSI on Betafpv SuperD
lilac arch
tall pivotBOT
Hi everyone
I installed Betafpv SuperD 868 MHz receiver on my quad. My radio is ...
✨AI-Generated response✨
It sounds like you may have an issue with your RSSI settings. You can also review Signal Health information.
please follow up in #help-and-support or #general-quad-help
-# {'cause': 'thread creation'}
swift dagger
Seems like something is wrong with the receiver. Do you have the correct firmware flashed?
lilac arch
Seems like something is wrong with the receiver. Do you have the correct firmwar...
I'm pretty sure I do but I'll try to reflash today and report back. In the meantime I found others complaining about low RSSI using SuperD receivers.
lilac arch
I updated both TX and RX to ELRS v3.5.5. Nothing has changed.
The one with -20 is R9MX receiver on another quad. Am I missing something here?
And this is a flight footage:
https://youtu.be/6ZnriJqbThM?si=1MiEST1HkPbKQoTw
swift dagger
Show a clear photo of the receiver and the ELRS lua for the TX and the RX
lilac arch
In the RX lua, the protocol was diversity, I just changed it to Gemini to try, didn't help
swift dagger
In the RX lua, the protocol was diversity, I just changed it to Gemini to try, d...
What values do you get on a benchtest now?
Have you tried different antennas on the RX?
lilac arch
Also, I don't know if it's normal but... When I click on "Other devices" and then on "SuperD receiver" it takes more than a minute until the options on that page to appear
lilac arch
What values do you get on a benchtest now?
I get values of 50-60
swift dagger
Both TX and RX are on 3.5.5?
lilac arch
Both TX and RX are on 3.5.5?
Yes
lilac arch
Have you tried different antennas on the RX?
I don't have any 868Mhz antennas lying around. But both antennas can be broken? Because the values are similar for both
lilac arch
I thought about buying Happymodel Es900 true diversity rx to replace but I'm not sure if this might be a bug or an issue with true diversity receivers and this radio
swift dagger
Why 900? 2.4 GHz or dual band would be a better choice
lilac arch
The problem is the lack of LBT support in GX12. I'm in Europe, therefore can't use 2.4 GHz without LBT.
lilac arch
What do you say to the response from Betafpv? 😆
Does the nameless person have a point?
jade eagle
your pictures doesn't show 100mW tx power, but 10mW.
lilac arch
your pictures doesn't show 100mW tx power, but 10mW.
That was only for the bench test, as suggested. For the flight it was set to 100mW.
Can anyone chime in on the argument from Betafpv support?
jade eagle
did you tried dyn power? to see how it behave
lilac arch
did you tried dyn power? to see how it behave
No I didn't. But I don't know how it would be helpful. -50 /-55dBm at 1 meter indicates an issue.