Arduino Wood Stove Controller

https://gist.github.com/rockfishon/9ff774cac8dc306963d6/2d7cdfda8622ca834ae21b5ce2a0e1bff0f32264

// stove ver 110 
#include <Adafruit_MAX31855.h> 
#include <LiquidCrystal.h> 
#include <Servo.h> 
#include <PID_v1.h> 
// define integers 
int x = 0; 
int setBeepBuzzer= 1; 
int muteBuzzer = LOW; 
int overTemp = LOW; 
int stoveMode = HIGH; 
int stoveShutdown = LOW; 
double stoveRunTemp = 500; 
int overtempSetPoint = 600; 
int servoPos = 15; 
int roomTempSetPoint = 72; 
int minStoveDamperSetting = 45; 
int stoveShutdownSetting = 31; 
double fdiff = 0; 
double insideTemp = 70; 
double f = 0; 
int fInt = f; 
int cfg = 0; 
double Output; 
double fnew; 
const int pulseWidthMin = 500; 
const int pulseWidthMax = 2100; 
int stoveRunTempInt = stoveRunTemp; 
// define pin constants 
const int buttonMutePin = 2; 
const int thermoCLK = 3; 
const int thermoCS = 4; 
const int thermoDO = 5; 
const int buttonStoveTempSetPointUp = 6; 
const int buttonStoveTempSetPointDown = 18; 
const int lcd1 = 7; 
const int lcd2 = 8; 
const int lcd3 = 9; 
const int lcd4 = 10; 
const int lcd5 = 11; 
const int lcd6 = 12; 
const int buzzerPin = 15; 
const int servoPin = 14; 
const int buttonRoomTempSetPointUp = 16; 
const int buttonRoomTempSetPointDown = 17; 
Servo myservo; 
Adafruit_MAX31855 thermocouple(thermoCLK, thermoCS, thermoDO); 
LiquidCrystal lcd(lcd1, lcd2, lcd3, lcd4, lcd5, lcd6); 
PID myPID(&f, &Output, &stoveRunTemp, 4, .2, 1, DIRECT); 
void setup() { 
 myservo.attach(servoPin, pulseWidthMin, pulseWidthMax); 
 pinMode(buzzerPin, OUTPUT); 
 pinMode(buttonRoomTempSetPointUp, INPUT); 
 pinMode(buttonRoomTempSetPointDown, INPUT); 
 pinMode(buttonMutePin, INPUT); 
 pinMode(buttonStoveTempSetPointUp, INPUT); 
 pinMode(buttonStoveTempSetPointDown, INPUT); 
 Serial.begin(9600); 
 lcd.begin(16, 2); 
 myservo.write(180); 
 myPID.SetOutputLimits(minStoveDamperSetting, 180); 
 myPID.SetMode(AUTOMATIC); 
 // 1234567890123456 
 lcd.print("Stove Control 8"); 
 lcd.setCursor(0, 1); 
 // 1234567890123456 
 lcd.print("by ROCKFISHON"); 
// wait for MAX chip to stabilize 
 delay(1000); 
} 
void loop() { 
// read thermocouple and subtract internal heat from lcd and interface board 
 insideTemp = (thermocouple.readInternal() * 9 / 5 + 29); 
 fnew = thermocouple.readFarenheit(); 
 while (isnan(fnew)) { 
 fnew = thermocouple.readFarenheit(); 
 lcd.print("T/C Problem"); 
 } 
 fdiff = fnew - f; 
 f = fnew; 
 fInt = f; 
// Compute PID 
 myPID.Compute(); 
//**************************************************** 
// Damper control section 
// servoPos = 0 then damper is closed 
// servoPos = 180 then damper is fully opened 
 if (!stoveShutdown && f <= insideTemp + 10) { // close the damper if the fire is out 
 stoveShutdown = HIGH; 
 } 
 if (stoveShutdown && f >= insideTemp +20) { // open the damper when the fire is started 
 stoveShutdown = LOW; 
 } 
 if (insideTemp <= roomTempSetPoint-.25) { 
 stoveMode = HIGH; 
 } 
 if (insideTemp >= roomTempSetPoint+.25 || overTemp == HIGH) { 
 stoveMode = LOW; 
 } 
 if (stoveShutdown) { 
 myservo.write(stoveShutdownSetting); 
 servoPos = stoveShutdownSetting; 
 } 
 else { 
 if (stoveMode) { 
 myservo.write(Output); 
 servoPos = Output; 
 } 
 else 
 { 
 myservo.write(minStoveDamperSetting); 
 servoPos = minStoveDamperSetting; 
 } 
 } 
// input loop for 5 seconds 
 for (int y = 0; y < 50; y++) { 
// read mute button 
 if (muteBuzzer == LOW) { 
 muteBuzzer = digitalRead(buttonMutePin); 
 } 
// buzzer overtemp alarm section 
 if (muteBuzzer) { 
 if (f < overtempSetPoint) { //resets the mute buzzer variable if the stove temp goes below the set temp 
 muteBuzzer = LOW; 
 overTemp = LOW; 
 } 
 digitalWrite(buzzerPin, LOW); 
 } 
 else 
 { 
 if (f > overtempSetPoint) { 
 digitalWrite(buzzerPin, HIGH); 
 overTemp = HIGH; 
 } 
 else 
 { 
 digitalWrite(buzzerPin, LOW); 
 overTemp = LOW; 
 } 
 } 
// beep buzzer to remind to close damper 
 if (setBeepBuzzer == 0 && fInt <=175) { 
 setBeepBuzzer = 1; 
 } 
 if (setBeepBuzzer ==1 && fInt >=200) { 
 for (int x = 0; x < 5; x++) { 
 digitalWrite(buzzerPin, HIGH); 
 delay (100); 
 digitalWrite(buzzerPin, LOW); 
 delay (500); 
 } 
 setBeepBuzzer = 2; 
 } 
 // beep buzzer to remind to close drawer 
 if (setBeepBuzzer == 2 && fInt >=400) { 
 for (int x = 0; x < 5; x++) { 
 digitalWrite(buzzerPin, HIGH); 
 delay (100); 
 digitalWrite(buzzerPin, LOW); 
 delay (500); 
 } 
 setBeepBuzzer = 0; 
 } 
//Config section 
 if (digitalRead(buttonRoomTempSetPointUp) && digitalRead(buttonRoomTempSetPointDown)) { 
 cfg = 1; 
 lcd.setCursor(0, 0); 
 lcd.print("minStoveDamperSe"); 
 lcd.setCursor(0, 1); 
 lcd.print(minStoveDamperSetting); 
 lcd.print(" "); 
 myservo.write(minStoveDamperSetting); 
 delay (1000); 
 while (cfg == 1) { 
 while (digitalRead(buttonStoveTempSetPointUp)) { 
 if (minStoveDamperSetting < 180) { 
 minStoveDamperSetting = minStoveDamperSetting + 1; 
 lcd.setCursor(0, 1); 
 lcd.print(minStoveDamperSetting); 
 lcd.print(" "); 
 myservo.write(minStoveDamperSetting); 
 delay (100); 
 } 
 } 
 while (digitalRead(buttonStoveTempSetPointDown)) { 
 if (minStoveDamperSetting > 0) { 
 minStoveDamperSetting = minStoveDamperSetting - 1; 
 lcd.setCursor(0, 1); 
 lcd.print(minStoveDamperSetting); 
 lcd.print(" "); 
 myservo.write(minStoveDamperSetting); 
 delay (100); 
 } 
 } 
 if (digitalRead(buttonRoomTempSetPointUp) && digitalRead(buttonRoomTempSetPointDown)) { 
 cfg = 2; 
 } 
 } 
 lcd.setCursor(0, 0); 
 lcd.print("stoveShutdownSet"); 
 lcd.setCursor(0, 1); 
 lcd.print(stoveShutdownSetting); 
 lcd.print(" "); 
 myservo.write(stoveShutdownSetting); 
 delay (1000); 
 while (cfg == 2) { 
 while (digitalRead(buttonStoveTempSetPointUp)) { 
 if (stoveShutdownSetting < minStoveDamperSetting ) { 
 stoveShutdownSetting = stoveShutdownSetting + 1; 
 lcd.setCursor(0, 1); 
 lcd.print(stoveShutdownSetting); 
 lcd.print(" "); 
 myservo.write(stoveShutdownSetting); 
 delay (100); 
 } 
 } 
 while (digitalRead(buttonStoveTempSetPointDown)) { 
 if (stoveShutdownSetting > 0) { 
 stoveShutdownSetting = stoveShutdownSetting - 1; 
 lcd.setCursor(0, 1); 
 lcd.print(stoveShutdownSetting); 
 lcd.print(" "); 
 myservo.write(stoveShutdownSetting); 
 delay (100); 
 } 
 } 
 if (digitalRead(buttonRoomTempSetPointUp) && digitalRead(buttonRoomTempSetPointDown)) { 
 cfg = 0; 
 } 
 } 
 } 
//Setting the room temperature 
 while (digitalRead(buttonRoomTempSetPointUp)) { 
 roomTempSetPoint = roomTempSetPoint + 1; 
 if (roomTempSetPoint == 81) { 
 roomTempSetPoint = 80; 
 } 
 lcd.setCursor(13, 1); 
 lcd.print(roomTempSetPoint); 
 delay (500); 
 } 
 while (digitalRead(buttonRoomTempSetPointDown)) { 
 roomTempSetPoint = roomTempSetPoint -1; 
 if (roomTempSetPoint == 64) { 
 roomTempSetPoint = 65; 
 } 
 lcd.setCursor(13, 1); 
 lcd.print(roomTempSetPoint); 
 delay (500); 
 } 
// Setting the stove temperature 
 while (digitalRead(buttonStoveTempSetPointUp)) { 
 stoveRunTemp = stoveRunTemp + 25; 
 if (stoveRunTemp == 725) { 
 stoveRunTemp = 700; 
 } 
 overtempSetPoint = 100 + stoveRunTemp; 
 stoveRunTempInt = stoveRunTemp; 
 lcd.setCursor(0, 1); 
 lcd.print(stoveRunTempInt); 
 delay (500); 
 } 
 while (digitalRead(buttonStoveTempSetPointDown)) { 
 stoveRunTemp = stoveRunTemp - 25; 
 if (stoveRunTemp == 175) { 
 stoveRunTemp = 200; 
 } 
 overtempSetPoint = 100 + stoveRunTemp; 
 stoveRunTempInt = stoveRunTemp; 
 lcd.setCursor(0, 1); 
 lcd.print(stoveRunTempInt); 
 delay (500); 
 } 
 delay (100); 
 } 
//**************************************************** 
// DISPLAY SECTION 
// First Line 
// Print stove probe temperature / servo position / stove run temp 
 lcd.setCursor(0, 0); 
 lcd.print(fInt); 
 lcd.print("F "); 
 lcd.setCursor(5, 0); 
 lcd.print(servoPos); 
 lcd.print(" "); 
 lcd.setCursor(10, 0); 
 lcd.print(insideTemp); 
 lcd.print("F"); 
// Second Line 
// print the room temperature set point / over temp setting / room temperature 
 lcd.setCursor(0, 1); 
 lcd.print(stoveRunTempInt); 
 lcd.print("F "); 
 lcd.setCursor(5, 1); 
 lcd.print(fdiff); 
 lcd.print("F "); 
 lcd.setCursor(13, 1); 
 lcd.print(roomTempSetPoint); 
 lcd.print("F"); 
// Serial Output Debugging 
 Serial.print(f); Serial.print(","); Serial.print(stoveRunTemp); Serial.print(","); Serial.print(overtempSetPoint); Serial.print(","); Serial.print(servoPos); Serial.print(","); Serial.print(fdiff); Serial.print(","); Serial.print(roomTempSetPoint); Serial.print(","); Serial.println(insideTemp); 
}