Troubleshooting RXLOSS Flag on FPV Drone with Full Signal
So my drone has the arming disable flag RXLOSS but at the same time when I power on the transmitter and then the drone it says on the transmitter that there is full signal and the receiver light is solid but betaflight says that there's RXLOSS so idk what to do. Also my transmitter does nothing when I connect it to the drone
7sem
Check you have RX going to TX and TX going to RX between the receiver and flight controller. If TX to TX and RX to RX, the receiver will still get power, but it wont have signals. In Betaflight, make sure you have the correct UART port for the receiver selected as SerialRX. In the configuration tab make sure you have the correct protocol: CFRS (ELRS) vs SBUS. Make sure you have the correct mapping for the radio in betaflight: AETR vs TAER. If all else fails, re-solder, re-flash, re-enter settings for the receiver. This still happens to me sometimes and it can be so frustrating, especially when I repeat that checklist several times and then it just seems to randomly start working.
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7sem
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@AurilFPV so the receiver is wired correctly ✅️. How do you know what Uart is right?
Also the protocol is right ✅️. and one last thing is the mapping thing what is that?
I'm sorry to bother you about it so if you have a video you would recommend, just to get me off your shoulders 😁
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7sem
All good my friend, this is a genuinely frustrating problem. The UART number will be on the physical board, the physical representation of the UART are the ground, voltage, RX, and TX solder pads, so whichever number is next to "RX/TX" on the FC is the port to change in Betaflight. Make sure both the ELRS RX/TX wires are on the same number RX/TX solder pads on the board. Generally UART 1, 2, 3 are the ones the FC maker want you to use. Also, make sure you aren't on the same UART as your VTX if you are using an HD connector for the VTX and not soldering wires directly to the board, this might require looking at a wiring diagram for the FC.
Channel mapping deals with which stick is throttle, pitch, etc., I believe you probably need "AETR1234", just to try to keep it simple.
It was definitely a Joshua Bardwell video, but for some reason I cant find it right now, his clips channel also answers a lot of questions like this from his livestreams. I actually just use the google search ai for a lot of stuff now though.
Remember, dont test with props on inside!
Let me know if you get it working!
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6sem
@AlmondKing I'm pretty sure that if DarwinFPV soldered it right, and you have no problem flying it the first few packs then is either a cold, cracked solder joint maybe?? Or you crashed and you ended up soldering the wire wrongly? I don't know man, there are lotsss of possibility. I recommend to just solder on a new receiver. :3 hope it helps!!
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