Projeto flutuador

/*
Projeto Flutuador
*/

#include "SoftwareSerial.h"

SoftwareSerial bluetooth(2, 3); //TX, RX (Bluetooth)

const int pumpPin = 13; // the pin that the LED is attached to
int incomingByte;      // a variable to read incoming serial data into
boolean currentState=false;
int lastTime=0;
int nextTime=0;
void setup() {
  //Initialize the software serial
  bluetooth.begin(9600);
  
  // initialize the LED pin as an output:
  pinMode(pumpPin, OUTPUT);
}

void loop() {
  lastTime=millis();
  if(nextTime<lastTime){
    nextTime= millis() + 5000;
    unsigned long allSeconds=millis()/1000;
    int runHours= allSeconds/3600;
    int secsRemaining=allSeconds%3600;
    int runMinutes=secsRemaining/60;
    int runSeconds=secsRemaining%60;
    
    char buf[21];
    sprintf(buf,"%02d:%02d:%02d",runHours,runMinutes,runSeconds);
    bluetooth.println(buf);
  }
  // see if there's incoming serial data:
  
  if (bluetooth.available() > 0) {
    // read the oldest byte in the serial buffer:
    incomingByte = bluetooth.read();
    // if it's a capital H (ASCII 72), turn on the PUMP:
    if (incomingByte == '!') {
      currentState=!currentState;
      if(currentState)
        digitalWrite(pumpPin, HIGH);
      else
        digitalWrite(pumpPin, LOW);
    }
   
  }
}