Omnibus F4 V3 Flight Controller looses receiver signal


#1

Just finished building my Chameleon with Airbot 4-in-1 ESC and Omnibus F4 V3 flight controller. I previously had Omnibus F4 Pro but I fried it thanks to having the ESCs on flipped over so I read the wiring diagram wrong and connected VBAT to M4 pin… duh.

Ok, but now with the new FC I have a problem that I do get my XSR receiver to bind with Taranis, it works ok and then some time is just stops working. I does not loose connection with Taranis, but there is just no input coming to the flightcontroller. I have tried this with two different receivers, XM+ (that I had on when I fried the previous FC) and a fresh XSR.

Using SBUS, the jumper soldered to SBUS setting. Power coming from the FC to the receiver. I don’t have anything going to RAM bus, no 5V or VBAT. FC is powered via VBAT.

Other than getting yet another board and trying out, is there anything I might try to debug this? Starting to sound like an issue in the FC (hardware or configuration).


#2

What is your CPU ultiisation withn betaflight? And it might be related to this issue with DMA mode on SDcard logging -

But I am not sure if that is the same issue but might be worth disabling blackbox logging temporarily to see if anything changes


Ominbus F4 V4 & DYS XSD 20A ESC - DSHOT not working