M5-ProductExampleCodes/Module/GPS/Arduino/GPSRaw/GPSRaw.ino

#include <M5Stack.h>

/* By default, GPS is connected with M5Core through UART2 */
HardwareSerial GPSRaw(2);

void setup() {
  
  M5.begin();
  GPSRaw.begin(9600);// GPS init

  Serial.println("hello");
  termInit();
}

void loop() {
  // put your main code here, to run repeatedly:
  if(Serial.available()) {
    int ch = Serial.read();
    GPSRaw.write(ch);  
  }

  if(GPSRaw.available()) {
    int ch = GPSRaw.read();// read GPS information
    Serial.write(ch);
    termPutchar(ch);
  }
}