String inputString = "";
bool stringComplete = false;
bool readmore = false;

uint32_t curr_millis;


const int NumPumps = 5;
typedef struct {
  uint8_t PIN;      // PIN
  bool Status = false;   // Status: An: 1, Aus 0
  uint32_t Menge = 0;
  uint32_t start_millis;
} StructPumps_T;
int PumpNum;
StructPumps_T Pumpe[NumPumps];
int PumpenAn = 0;
int Mode = 0;
// 0 = Seriell  - Char S
// 1 = Parallel - Char P

void Split(String& input, char Sep) {
  int count = 0;
  int pos = input.indexOf(Sep);
  String tmpstr;
  tmpstr = input.substring(0,pos);
  if ( tmpstr == "P" ) {
    Mode = 1;
  } else {
    Mode = 0;
  }
  input = input.substring(pos+1);
  pos = input.indexOf(Sep);


  tmpstr = input.substring(0,pos);
  PumpenAn = tmpstr.toInt();
  input = input.substring(pos+1);
  pos = input.indexOf(Sep);

  for ( uint8_t z = 0; z < PumpenAn; z++ ) {
    tmpstr = input.substring(0,pos);
    input = input.substring(pos+1);
    pos = input.indexOf(Sep);
    PumpNum = tmpstr.toInt();

    tmpstr = input.substring(0,pos);
    input = input.substring(pos+1);
    pos = input.indexOf(Sep);
    Pumpe[PumpNum].Menge = tmpstr.toInt();

  }
  inputString = "";
}

void setup() {
  Serial.begin(9600);
  while (!Serial);
  Serial.println("Type something and press Enter:");
}

void loop() {
  if (stringComplete) {
    Serial.print("You entered: ");
    Serial.println(inputString);
    Split(inputString,';');

    // PARALLEL
    for ( uint8_t z = 0; z < NumPumps; z++ ) {
      if ( Pumpe[z].Menge > 0 && Pumpe[z].Status == false) {
        Pumpe[z].Status = true;
        digitalWrite(Pumpe[z].PIN, HIGH);
        Pumpe[z].start_millis = millis();
      }
    }
    for ( uint8_t z = 0; z < NumPumps; z++ ) {
      if ( Pumpe[z].Status == true && curr_millis - Pumpe[z].start_millis >= Pumpe[z].Menge*1000 ) {
        Pumpe[z].Status = false;
        digitalWrite(Pumpe[z].PIN, LOW);
        Pumpe[z].start_millis = 0;
        PumpenAn--;
      }
    }
    
    if ( PumpenAn == 0 ) {
      stringComplete = false;
      Serial.println("fertig");
    }
  }
}

void serialEvent() {
  while (Serial.available()) {
    char inChar = (char)Serial.read();
    if (inChar == 'S') {
      inputString = "";
      readmore = true;
    } else {
      if ( readmore ) {
        if (inChar == '\n' ||  inChar == 'E' ){
          stringComplete = true;
          readmore = false;
        } else {
          inputString += inChar;
        }
      }
    }
  }
}