Multiple serial receivers support

ArduCopter Copter 4.3
1

In manual it’s possible, i’ve set RC_OPTIONS bit 10
https://ardupilot.org/copter/docs/common-multiple-rx.html
But i’m still getting error: PreArm: Multiple SERIAL ports configured for RC in

2

Which Flight Controller do you have?

3

Holybro Pixhawk 6C
20 chars…

4

So you have one receiver connected to the standard RCIN port and the 2nd connected to a serial port and only that serial port protocol is set to 23?

5

i want to have 2 RCIN ports to be set to 23, is that possible?

6

No. That’s not how it works. The primary Rx is on the IOMCU (RCIN port) and the 2nd one is on a serial port. You can only have one serial port selected for protocol 23. And why would you want to do that anyway?