void setup() {
  Serial.begin(115200);
}


String test, ssid, password, mqttbroker;

void loop() {
if(Serial.available())
  {

 test = Serial.readString();

//SSID:
  int8_t ssidini = test.indexOf("SSID: ", 0);
  int8_t ssidfin = test.indexOf("\n", ssidini);

  if(ssidini >= 0)
  ssid = test.substring(ssidini+6, ssidfin-1);

//Passwd:
  int8_t passini = test.indexOf("Passwd: ");
  int8_t passfin = test.indexOf("\n", passini);

  if(passini >= 0)
  password = test.substring(passini+8, passfin-1);

//MQTT
  int8_t mqttini = test.indexOf("MQTT: ");
  int8_t mqttfin = test.indexOf("\n", mqttini);

  if(mqttini >= 0)
  mqttbroker = test.substring(mqttini+6, mqttfin-1);





Serial.print(ssid); Serial.print(password);Serial.print(mqttbroker);




   }//end if


}//end loop

/*
SSID: Acasuca
Passw: ASA123
MQTT: masserv.utcluj.ro


*/