Pixhawk Telem2 Port not appeared

I use the Pixhawk4 from Holybro.

Airframe
Airframe type : Quadrotor x
Vehicle : Generic Quadopter
Firmware Version 1.12.3

and I use Telem1 on telemetry.

I want to use Telem2 on Wi-Fi.
So, I tried to change Telem2’s baudrate to 921600.

But I can’t found the parameter “SER_TEL2_BAUD”.
Why did it happen?

@Serahan You need to add a new serial instance by defining MAV_2_CONFIG and reboot the firmwrae in order to see SER_TEL2_BAUD

(Parameter Reference | PX4 User Guide)

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