Is there a chance to get 2nd RPM value on uBrain2
I do have motor tail on uBrain.
I'm interessted to check tail speed as well on tranmitter, as sometimes you can see when motor is going to loose power due to overheated magnets.
Is there any chance to connect 2nd RPM (Hobbywing) sensor from tail motor to uBrain ?
No, reading a second RPM sensor, recording the data in the flight logs memory and sending the value to the transmitter via telemetry is not a feature currently available.
But it is an interesting idea that will be added to the "To Do" list.