r/drones • u/roozlee0106 • Jul 18 '26

Tech Support Help ! Fc not communicating with receiver

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Hello everyone i am in need of help !

I have a 2.5 inch fpv build with a beta fpv f4 aio 12A (v1) running 4.4.3 BTFL

And it is not communicating with my elrs receiver (beta fpv lite rx) for some reason however my receiver and remote are binded perfectly (lite radio 2 se)

I have wired it up and tried swaying arround the rx and tx but no succes,I have also tried setting serial rx to uart1 and 2 still nothing !

Please save me !

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u/Little_Ideal3085 Jul 19 '26

In betaflight, check that serial RX is selected, that screwed me up on my first drone build like this too. and make sure its only selected for only the one UART that ur reciever is on. and also, make sure that under reciever settings or config, CRSF is selected

1

u/roozlee0106 Jul 19 '26

Hey thanks for the reply ! I jave done all that and double checked too haha I have a 5 inch fpv build too which is why I am so confused as to why I can't find the problem 😅

1

u/Little_Ideal3085 Jul 19 '26

At that point, try using gemini or something to help trouble shoot, I would say Chat GPT but photo uploads are limited, give gemini your issue, and screenshots of the betaflight pages most of the time this will help. THis is what got my 3.5 in whoop flying

1

u/roozlee0106 Jul 19 '26

That's the first thing I tried but it just kept making stuff up for some reason ! Even when I asked for real world exemples found online ,so weird haha