/*
 * Arduino Soldering station By SymbolTech
 * Pins diagram :
 * ARDUINO PIN B4 connected to IR sensor
 * ARDUINO PIN A8 connected to DIODE cathode and anode to the MOSFET gate
 * ARDUINO PIN A15 connected to SET push button
 * ARDUINO PIN A12 connected to UP push button
 * ARDUINO PIN A11 connected to DOWN push button
 * Arduino PIN A0 connected to LM358 PIN 1
 * ARDUINO PIN B7 connected to SDA OLED display
 * ARDUINO PIN B6 connected to SCL or SCK OLED display
 * The oled display is I2C intarface 
 */

#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306_STM32.h>

#define OLED_RESET 4
Adafruit_SSD1306 display(OLED_RESET);

#if (SSD1306_LCDHEIGHT != 64)
#error("Height incorrect, please fix Adafruit_SSD1306.h!");
#endif

int limita = 1500; // Here you can modify the STANDBY period the higher is the number the longer will be the STANDBY period
int schimbstatut = 1;
int statutIron = 1;
int handle_sensor = PB4; // IR Sensor pin
int handleStatus;
int senzor = PA0; // LM358 pin 1
int mosfet = PA8; // The output to the mosfet
int set = PA15; // Set button
int up = PA12; // UP button
int down = PA11; // DOWN button
int setValue = 0;
int setValueStandby = 0;
int mosfetValue = 0;
int mosfetOff = 0;
int valueSenzor;
int valueSenzor1;
int grade;
int setGrade;
int setGradeStandby;
int percent;
String iron_mode;
String statut;

void setup() {

  //Serial.begin(9600);
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.clearDisplay();
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(4,0);
  display.println("SymbolTech");
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(18,19);
  display.println("YouTube Channel");
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(9,30);
  display.println("SOLDERING");
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(22,50);
  display.println("STATION");
  display.display();
  delay(6000);

pinMode(handle_sensor, INPUT);
pinMode(senzor, INPUT);
pinMode(mosfet, OUTPUT);
pinMode(set, INPUT_PULLUP);
pinMode(up, INPUT_PULLUP);
pinMode(down, INPUT_PULLUP);

}

void loop() {

  handleStatus = digitalRead(handle_sensor);
  //Serial.println(handleStatus);
if(statutIron == 1 && handleStatus == 0)
{
 limita = limita - 1;
 delay(1);

  statut = "     ";
  setValueStandby = 120;
  setGradeStandby = setValueStandby;
  valueSenzor = analogRead(senzor);
  valueSenzor1 = map(valueSenzor, 0, 5400, 0, 800);
  grade = map(valueSenzor1, 0, 800, 0, 500);
  percent = map(mosfetValue, 0, 254, 0, 100);
  //Serial.println(grade);
  analogWrite(mosfet, mosfetValue);

if(grade < setGradeStandby)
{
  mosfetValue = mosfetValue + 10;
  //Serial.println(mosfetValue);
  //Serial.println(grade);
  if(mosfetValue > 245)
  {
    mosfetValue = 254;
  }
}

if(grade >= setGradeStandby)
{
  mosfetValue = 0;
  //Serial.println(mosfetValue);
  //Serial.println(grade);
}

  if(grade > 35)
  {
    iron_mode = " Hot";
  }

if(grade < 30)
{
  iron_mode = "Cold";
}

  display.clearDisplay();
  display.setTextSize(3);
  display.setTextColor(WHITE);
  display.setCursor(1,12);
  display.println("STANDBY");
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(10,44);
  display.println(grade);
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(68,44);
  display.println(iron_mode);
  display.display(); 
//Serial.println(limita);
 if(limita <= schimbstatut)
 {
 statutIron = 2;
 limita = 0;

  analogWrite(mosfet, mosfetOff);  
  display.clearDisplay();
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(4,0);
  display.println("SymbolTech");
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(18,19);
  display.println("YouTube Channel");
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(9,30);
  display.println("SOLDERING");
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(22,50);
  display.println("STATION");
  display.display();
  
 }
  
}

if(statutIron == 2 && handleStatus == 1)
{
 limita = 1500;
 statutIron = 1;  
}
  
if(statutIron == 1 && handleStatus == 1)
{
  limita = 1500;
  valueSenzor = analogRead(senzor);
  //Serial.println(valueSenzor);
  //delay(200);
  valueSenzor1 = map(valueSenzor, 0, 5400, 0, 800);
  grade = map(valueSenzor1, 0, 800, 0, 500);
  percent = map(mosfetValue, 0, 254, 0, 100);
  //Serial.println(grade);
  analogWrite(mosfet, mosfetValue);

  display.clearDisplay();
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(17,0);
  display.println("SET");
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(51,0);
  display.println(":");
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(100,0);
  display.println("C");
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(62,0);
  display.println(setValue);
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(5,50);
  display.println(iron_mode);
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(47,50);
  display.println(statut);
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(3,22);
  display.println("IRON");
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(51,22);
  display.println(":");
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(62,22);
  display.println(grade);
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(100,22);
  display.println("C");
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(95,50);
  display.println(percent);
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(115,50);
  display.println("%");
  display.display();

if(digitalRead(up) == LOW)
{
  statut = "     "; 
  setValue = setValue + 10;
  delay(100);

  if(setValue > 390)
  {
    setValue = 400;
  }
}

if(digitalRead(down) == LOW)
{
  statut = "     ";
  setValue = setValue - 10;
  delay(100);
  //Serial.println(setValue);

  if(setValue < 10)
  {
    setValue = 0;
  }
}

if(digitalRead(set) == LOW)
{
  statut = "     ";
  setGrade = setValue;
  //Serial.println(setGrade);
}

if(grade < setGrade)
{
  mosfetValue = mosfetValue + 10;
  //Serial.println(mosfetValue);
  //Serial.println(grade);
  if(mosfetValue > 245)
  {
    mosfetValue = 254;
  }
}

if(grade >= setGrade)
{
  mosfetValue = 0;
  //Serial.println(mosfetValue);
  //Serial.println(grade);
}
 
  if(grade > 55)
  {
    iron_mode = " Hot";
    
  if(grade == setValue)
  {
    statut = "Ready";
  }
  }

if(grade < 50)
{
  iron_mode = "Cold";
}
}

}