No signal from r-xsr from my T-MOTOR TM 2419+ PLUS HD

[Andrea]

So i've bougth a 3 inch drone but i can't get any signal from the receiver.
There is a picture:
the receiver is R-xsr, the fc is mamba f405 mini, the drone is T-MOTOR TM 2419+ PLUS HD, and i plug the battery in the drone otherwise the receiver will not get powered





When i open betsaflight i get no signal from the receiver, nothing moves, i checked the quad, nothing is burned, all the motor works.


I've only unpacked my quad and binded the receiver, i tested the motor and other stuff and it works, but i get no signal.

Did i miss something ??

unboxing

 

[ElectriSean]

Not all FC's power the Rx from USB, what happens if you leave the battery plugged in? (with the props off of course )

 

[PsyBorg]

Try changing uarts.

Also check to see if your radio is set to d8 or d16. One of those x series receivers is picky about that

 

[Andrea]

Hello, I checked some things, the Rx only powers up when the battery is connected, but i get no signal, I used D16, so I've already tried all the uarts and nothing works.
Could it be something about inverted or univerted sbus signal?
I got this problem while I was making my 3d printed quad and i solved it by soldering an extra cable on the receiver

 

[ElectriSean]

From the little info I could find on that FC, UART1 is the only inverted UART available. Make sure this is where the signal wire from the Rx is connected, it should be labelled as SBUS on the FC.

 

[Andrea]

It works guys, I tried to swith pins, from Sbus to PPM and magically the recevier got alive...
Is it possibile that my r-xsr came in PPM mode as default?
Or maybe i've pushed in an incorret way the only botton on the RX....

 

[ElectriSean]

Switching between CPPM and SBUS is done by pressing the button for 4 seconds. It's possible it was in PPM mode from the factory.

 

[Andrea]

oh come on..... i did not know that.....i'm such a NOOOOOOOOOOOOOOOOOOOOOOOOOOOB

 

[ElectriSean]

oh come on..... i did not know that.....i'm such a NOOOOOOOOOOOOOOOOOOOOOOOOOOOB

I didn't know until yesterday either... I haven't used PPM for a long time, and my one R-XSR came is SBUS mode