void setup() {
  Serial.begin(115200);
  String raw="AT+QGPSLOC=2\r\r\n+QGPSLOC: 075655.00,16.07895,108.21216,57.23,-4.3,3,199.070,12.412,6.801,220924,05\r\n\r\nOK\r\n\r\n";
int startIn = raw.indexOf("+QGPSLOC:");
 //Serial.println(startIn) ;
int endIn= raw.indexOf("\r",startIn+9);
 //Serial.println(endIn) ;
 String a1 = raw.substring(startIn+9,endIn);
 a1.trim();
 Serial.println(a1) ;
 startIn = a1.indexOf(',');
 String a2;
while(startIn !=-1){
  a2=a1.substring(0,startIn);
  a1=a1.substring(startIn+1);
  Serial.println(a2) ;
  startIn = a1.indexOf(',');
}


}

void loop() {
  // put your main code here, to run repeatedly:

}