Smart Thermostat Arduino - part thermostat functions

smarttherm_part_thermostat_functions.ino

//function to determine if boiler controll loop should go to run level 1
int frunScen (int actTemp, int setTemp) {
  if ( (setTemp*10) - actTemp > 35) {
     return 1;
  } else {
    return 0;
  }
}

//function to determine how many seconds boiler should go on within 10 minute interval
unsigned long fscenLength(int actTemp, int setTemp) {
  unsigned long scnel;
 // int iscnel = 0;
  if ( (setTemp*10) - actTemp > 260) {
     scnel = (6UL*60UL*1000UL);
  } else if ( (setTemp*10) - actTemp > 160) {
    scnel = (5UL*60UL*1000UL);
  } else if ( (setTemp*10) - actTemp > 70) {
    scnel = (4UL*60UL*1000UL);
  } else if ( (setTemp*10) - actTemp > 40) {
    scnel = (3UL*60UL*1000UL);
  } else {
   scnel =  (2UL*60UL*1000UL);
  }
  return scnel;
}

//function to check if boiler should stay on or go off
int fboilerStat(unsigned long starts,unsigned long scenl,unsigned long cur ,int actTemp, int setTemp) {

  if (actTemp -  (setTemp*10) < 35){ //criteria 1: only say on if act temperature is below set temperature + margin
    if (cur - starts < scenl) { //criteria 2: only stay on of boiler has not been on for the number of seconds determined by fscenLength
      return 1; //stay on
    } else {
     return 0;  //go off (because boiler was on for number of minues determined by fscenLength
    }

  } else {
    return 2; //go off (2 is used to monitor overflow)
  }

}