Hi. Sorry but I don't use Meshtastic. The software I've written is written from scratch and is deliberately less involved than using Meshtastic's menus. There are lots of videos and articles out there to help you with the menus though.

Hi.
Have you tried reading bytes from the GPS and displaying them on a serial monitor as they arrive as below, just to show you are getting data (if the serial setup is incorrect you should still receive data but it will be gibberish):

// Serial is the serial monitor
// Serial1 is the GPS data

int intChar;
char charChar;
intChar = Serial1.read();
if(inChar != -1){
charChar = (char)intChar;
Serial.print(charChar);
}

I have been using the M5Stack GPS v1.1 and it was set to 115200@7N1, not the advertised 115200@8N1 so might be an issue there (I got gibberish at first)

Finally my M5Stack GPSv1.1 works fine with an Adafruit Itsy Bitsy 3v controller and an ESP32S3 based controller but not with the Seeed Wio Terminal. With the Seeed Wio Terminal I get nothing at all - no gibberish, absolutely nothing. It's as if the signal is not there (but it is !!).

Hi
Just wondering if anyone out there is interested in a project I've just completed.
Basically, two Cardputer ADV's with LoRa868 caps talking to each other (using LoRa of course).
Software written using the Arduino IDE in their version of cpp. The program is loaded onto both units and implements both receive and transmit functions. A history of 5 messages is displayed on the CPADV's screen (eat your heart out Meshtastic) and are colour coded to indicate receive/transmit status. When starting the program the user is presented with a blank screen - this allow charging of the unit without causing screen burn-in (the unit has to be charged whilst powered up !). Pressing DEL enables/disables a tone when a packet is received. Pressing ENTER starts the program. Pressing any other key displays battery information. All transmissions are software encoded to keep them private (encode/decode keys are easily changed). Can post the Arduino .ino file on the forum (if that's even possible and if some kind individual will tell me how it's done) if anyone would like to take a look.