Use of GPS2 port

I encountered a problem. I connected Leddy’s F9P RTK module to the Holybro Pix6c. However, the GPS1 interface type did not match the connection cable for Leddy, so I had no choice but to link the GPS2 port of the Pix6c. After the settings were completed, the prompt shown in Figure 1 appeared, and there was no GPS information in the return transmission. I disabled GPS1 and the situation in Figure 2 occurred. Could you please tell me how to solve this?

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Set the following:

SERIAL3_PROTOCOL,-1
SERIAL4_PROTOCOL,5
GPS1_TYPE,1
GPS2_TYPE,0

You only have one GPS, so it is GPS1 as far as ArduPilot is concerned, despite the serial port labeling.

OK. I’ll give it a try.