Rak 4631 and 12500 gps u-center passthrough

I have a rak4631 (both big and small baseboards in hand) and zoe-m8q gps modules.

I need help gettig serial from the gps out of usb so i can connect to ucenter.

Ive searched high and low for a simple loopback/passthrough firmware and im stuck.

Can someone help please :slight_smile:

Welcome to the forum @mrocklewitz
loopback Serial1 to Serial_

It is from a cellular modem, but it forwards everything received from UART serial (Serial1) to the USB (Serial)