bool state=0;
String receData="";
int valueH=0;
int valueM=0;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
}

void loop() {
  if(Serial.available()>0){
    char dataBuff=Serial.read();
    if(state==0){
      if(dataBuff=='S'){
        state=1;
        receData="";
      }
    }
    else{
      if(dataBuff=='\r'){
      state=0;
    int slen=receData.length();
    if(slen==0){
      Serial.println("No data recevied!");
    }else{
      String sHours,sMinu;
      int i=receData.indexOf(':');
      sHours=receData.substring(0,i);
      sMinu=receData.substring(i+1);
      valueH=sHours.toInt();
      valueM=sMinu.toInt();
      if (valueH>23||valueM>59) {
      Serial.println("Error message received!");
      }
      else {
      Serial.printf("Set Hours:%d Minutes:%d\n",valueH,valueM);
      }
    }
    }
    else {
    receData+=dataBuff;
    // Serial.println(receData);
    }
  }
}
}