Teseo-liv3f Power save mode or Standby mode

for my project, I am using Teseo-liv3f (GNSS1A1 expansion board) to get the GPS information In arduino IDE.

In order to reach power saving, I want to turn of the GPS for a period of time and turn it on.

I try to force the GPS into standby mode, and I send the command mentions in the software manual
MicroNMEA::sendSentence(gps,"$PSTMFORCESTANDBY,00010");

void loop(void)
{
   //If a message is recieved print all the informations
   if (ppsTriggered)
   {
      ppsTriggered = false;
      ledState = !ledState;
      digitalWrite(LED_BUILTIN, ledState);

      // Output GPS information from previous second
      
     
      console.print("Valid fix: ");
      console.println(nmea.isValid() ? "yes" : "no");

      console.print("Nav. system: ");
      if (nmea.getNavSystem())
         console.println(nmea.getNavSystem());
      else
         console.println("none");

      console.print("Num. satellites: ");
      console.println(nmea.getNumSatellites());

      console.print("HDOP: ");
      console.println(nmea.getHDOP()/10., 1);
      
      long latitude_mdeg = nmea.getLatitude();
      long longitude_mdeg = nmea.getLongitude();
      console.print("Latitude (deg): ");
      console.println(latitude_mdeg / 1000000., 6);

      console.print("Longitude (deg): ");
      console.println(longitude_mdeg / 1000000., 6);

      nmea.clear();
   }

   //While the message isn't complete
   while (!ppsTriggered && gps.available())
   {
      //Fetch the character one by one
      char c = gps.read();
      console.print(c);
      //Pass the character to the library
      nmea.process(c);
   }
     //Serial.println("@ LEAST 10 TICKS!");

     MicroNMEA::sendSentence(gps,"$PSTMFORCESTANDBY,00010");
     delay(5000);
     digitalWrite(13, HIGH);
     delay(2000);
     digitalWrite(13,LOW);
     delay(10000);
}

However, I can not turn in back to normal and receive GPS signal anymore. Does anyone know how to reach wake it up in software way?

Secondly, I also tried to turn it into periodic mode.
I use the following code

void loop(void)
{
   //If a message is recieved print all the informations
   if (ppsTriggered)
   {
      ppsTriggered = false;
      ledState = !ledState;
      digitalWrite(LED_BUILTIN, ledState);


      // Output GPS information from previous second
      
     
      console.print("Valid fix: ");
      console.println(nmea.isValid() ? "yes" : "no");


      console.print("Nav. system: ");
      if (nmea.getNavSystem())
         console.println(nmea.getNavSystem());
      else
         console.println("none");


      console.print("Num. satellites: ");
      console.println(nmea.getNumSatellites());


      console.print("HDOP: ");
      console.println(nmea.getHDOP()/10., 1);
      
      long latitude_mdeg = nmea.getLatitude();
      long longitude_mdeg = nmea.getLongitude();
      console.print("Latitude (deg): ");
      console.println(latitude_mdeg / 1000000., 6);


      console.print("Longitude (deg): ");
      console.println(longitude_mdeg / 1000000., 6);


      nmea.clear();
   }


   //While the message isn't complete
   while (!ppsTriggered && gps.available())
   {
      //Fetch the character one by one
      char c = gps.read();
      console.print(c);
      //Pass the character to the library
      nmea.process(c);
   }
     //Serial.println("@ LEAST 10 TICKS!");
     //MicroNMEA::sendSentence(gps, "$PSTMLOWPOWERONOFF,1,0,0,0,0,0,0,3,100,0,1,1,15,180");
     //MicroNMEA::sendSentence(gps, "$PSTMSRR");
     delay(10000);
}

This also make no difference.

Does anyone have experience about this? Can you give me a help. I really appreciate it!