// https://projecthub.arduino.cc/NoraTheDoggo/diy-soldering-iron-control-for-862d-af4052

// miniCore Pinout https://camo.githubusercontent.com/e24a74a43dc7253178498970cc157879f44ceafeddc920667deec9fb0733628a/68747470733a2f2f692e696d6775722e636f6d2f715849456368542e6a7067


#include <Wire.h>

//#define ADAFRUIT_
#ifdef ADAFRUIT_
  #include <Adafruit_SSD1306.h>
  #include <Adafruit_GFX.h>
  #define   OLED_ADDR   0x3C
  Adafruit_SSD1306 display(-1);
#endif

#define U8G2_
#ifdef U8G2_
  #include <U8g2lib.h>
  
  U8G2_SSD1306_128X64_NONAME_F_SW_I2C display(U8G2_R0, A5, A4, U8X8_PIN_NONE);
#endif

#define TM1650_         1
#ifdef TM1650_
  // https://github.com/arkhipenko/TM1650/blob/master/examples/TM1650_example01/TM1650_example01.ino
#include <TM1650.h>
#endif

#include <U8g2lib.h>

#define PIN_OUT     10
#define PIN_IN      A0

//https://alexgyver.ru/tm1637_display/
#define CLK A6
#define DIO A7
#include <GyverTM1637.h>
GyverTM1637 disp(CLK, DIO);

int settemp = 590; //manual   set variables

int output = 0;
int temp = 0;
String inputString = "";
boolean   rap = false;
boolean stringComplete = false;
int t = 0;
int mappedpower   = 0;
byte powermultiply = 0;
long counter = 0;
int temp2 = 0;
byte outputoffset   = 0;
byte scaleread = 0;

void setup() {
  Serial.begin(9600);
  pinMode(PIN_OUT,   OUTPUT);
  digitalWrite(PIN_OUT, LOW);

  #ifdef ADAFRUIT_
    display.begin(SSD1306_SWITCHCAPVCC, OLED_ADDR);
    display.clearDisplay();
    display.display();
  #endif

  #ifdef U8G2_
    Wire.begin();//A4, A5
    //display.setBusClock(800000);
    display.begin();
    display.setBusClock(800000);
    display.enableUTF8Print();

    display.clearDisplay();
    //display.clearBuffer();
    display.setFont(u8g2_font_ncenB08_tr);
    ////display.print("123");
    display.drawStr(0,10,"Hello World!");
    display.sendBuffer();
  #endif

  #ifdef DISP7SEG_
    disp.clear();
    disp.brightness(7);  // яркость, 0 - 7 (минимум - максимум)
    disp.clear();
    disp.displayByte(_H, _E, _L, _L);
  #endif

  rapid();
}

void   loop() {
  pid();

  /*
  #ifdef ADAFRUIT_
    display.clearDisplay();
  #endif
  #ifdef U8G2_
    display.clearDisplay();
  #endif
  updatebar();
  updatetext();
  #ifdef ADAFRUIT_
    display.display();
  #endif
  #ifdef U8G2_
    display.sendBuffer();
  #endif*/
}



void rapid() { //Controls the soldering iron by   rapidly heating it up in the beginning.
  if (rap == false) {
    digitalWrite(PIN_OUT,   HIGH);
    output = 255;
    do {
      temp = analogRead(0);
      Serial.print("rapid ");
      Serial.println(temp);

      /*
      #ifdef ADAFRUIT_
        display.clearDisplay();
      #endif
      updatebar();
      updatetext();
      #ifdef ADAFRUIT_
        display.display();
      #endif
      */
    } while (temp - settemp >   1);
    digitalWrite(PIN_OUT, LOW);
    rap = true;
  }
}

void pid()   { //Controls the soldering with slow active power heating.
  temp = analogRead(PIN_IN);   //Temp averager
  temp2 = temp;
  delay(50);
  temp = analogRead(PIN_IN);
  temp = temp + temp2;
  temp = temp / 2;

  zeroscale(); //activate no   soldering iron checker
  temp = temp + outputoffset;

  output = temp -   settemp;
  output = output + powermultiply;
  output = output * 4;

   if (output < 0) {
    output = 0;
  }
  if (output > 255) {
    output   = 255;
  }
  counter = counter + 1;
  if (counter > 10) {
    counter   = 0;
    if (temp > settemp + 3) {
      powermultiply = powermultiply + 1;
     }
    if (temp < settemp - 3 && powermultiply > 0) {
      powermultiply   = powermultiply - 1;
    }
  }
  Serial.print(" pow:"); 
  Serial.print(powermultiply);
  Serial.print(",   temp:");
  Serial.print(temp);
  Serial.print(", output:");
  Serial.println(output);
   analogWrite(PIN_OUT, output);
}

void updatebar() { //Updates Powerbar on   OLED display
  mappedpower = map(output, 0, 255, 0, 127) - 10;
  //display.fillRect(0,   0, mappedpower, 8, WHITE);
  //display.fillRoundRect(mappedpower - 5, 0, 20, 8,   3, WHITE);
}

void updatetext() {//Update text on Oled display
/*
  #ifdef ADAFRUIT_
    display.setCursor(0,   9);
    display.setTextColor(WHITE);
    display.setTextSize(1);
    display.print("Set   Temp: ");
    display.print(settemp);
    display.setCursor(0, 20);
    display.print("Temp:   ");
    display.print(temp);
  #endif
  #ifdef U8G2_
    display.setCursor(0,   9);
    display.setTextColor(WHITE);
    display.setTextSize(1);
    display.print("Set   Temp: ");
    display.print(settemp);
    display.setCursor(0, 20);
    display.print("Temp:   ");
    display.print(temp);
  #endif
  */
}

void zeroscale() { //If soldering iron   is unplugged, adjust the input pin value to zero it out
  if (temp < 200) {

    /*
    #ifdef ADAFRUIT_
      display.clearDisplay();

      display.setCursor(0, 20);
      display.setTextColor(WHITE);
      display.setTextSize(1);
      display.print("No soldering iron.");
      display.display();
    #endif
    */
    delay(10000);
    
    /*
    #ifdef ADAFRUIT_
      display.setCursor(0, 0);
      display.print("Testing   in 5 seconds.");

      display.display();
    #endif
    */
    delay(5000);

    if   (temp < 200) {
      outputoffset = temp;
    }

/*
    #ifdef ADAFRUIT_
      display.clearDisplay();

      display.setCursor(0, 20);
      display.setTextColor(WHITE);
      display.setTextSize(1);
      display.print("Output offset set.");
      display.setCursor(0, 0);
      display.print("Connect   the iron.");

      display.display();
    #endif
    */
    do {
      scaleread = analogRead(PIN_IN);
     } while (scaleread < 200);

  }
}