COFFEE　自家焙煎　タイマー付き温度計 「ROAST　TIMER」 の製作

#include <stdio.h>
#include <string.h>
#include <Wire.h>

#include <SPI.h>
#include "Adafruit_MAX31855.h"

#include "BluetoothSerial.h"

#include "SSD1306Wire.h"

const int startpin = 2, stoppin = 4;
unsigned long delay_cntr = 0;
unsigned int  sw_id = 0;

unsigned int sec_cntr = 0;
unsigned int min_cntr = 0;
unsigned int t_sec = 0;
unsigned int t_min = 0;

char MM_SS[] = "00:00";
char MM_work[] = "00";
char SS_work[] = "00";

double nt = 0;
double bnt = 0;
double ro = 0;
double ror = 0;


// MAX31855;
#define MAXDO   19
#define MAXCS   5
#define MAXCLK  18
Adafruit_MAX31855 thermocouple(MAXCLK, MAXCS, MAXDO);

//Bluetooth;
BluetoothSerial SerialBT;

// SSD1306;
SSD1306Wire display1(0x3c, SDA, SCL);
SSD1306Wire display2(0x3c, SDA, SCL);

void setup() {
  pinMode(startpin, INPUT);
  pinMode(stoppin, INPUT);

// SSD1306 Initial process;
  //  初期化
  display1.init();
  display2.init();
  //  反転
  display1.flipScreenVertically();
  display2.flipScreenVertically();
  //  フォント
  display1.setFont(ArialMT_Plain_16);
  display2.setFont(ArialMT_Plain_24);
  //  エリア＋初期文字
  display1.drawString(10,2,"ROAST TIMER");
  display2.drawString(35,32,"00:00");
  //　初期表示
  display1.display();
  display1.setFont(ArialMT_Plain_24);
  display2.display();
  //  バッファクリア
  display1.clear();
  display2.clear();

// Serial Initial process;

  Serial.begin(9600);
  while (!Serial) delay(1); // wait for Serial on Leonardo/Zero, etc

  Serial.println("ROAST TIMER");

  delay(500); // wait for MAX chip to stabilize
  Serial.print("Initializing sensor...");
  if (!thermocouple.begin()) {
    Serial.println("ERROR.");
    while (1) delay(10);
  }
  Serial.println("DONE.");

  SerialBT.begin("ROAST TIMER");

}


void loop()
{

  if(delay_cntr == 1000) {

//== about 1 second(1000ms) interval

// TEMP Process
  // basic readout test, just print the current temp
  //   Serial.print("Internal Temp = ");
  //   Serial.println(thermocouple.readInternal());

   double c = thermocouple.readCelsius();
   double nt = thermocouple.readCelsius();

//   bnt = nt;

   if (isnan(c)) {
     int ktmf = 1;
     Serial.println("Thermocouple fault(s) detected!");
     uint8_t e = thermocouple.readError();
     if (e & MAX31855_FAULT_OPEN) Serial.println("FAULT: Thermocouple is open - no connections.");
     if (e & MAX31855_FAULT_SHORT_GND) Serial.println("FAULT: Thermocouple is short-circuited to GND.");
     if (e & MAX31855_FAULT_SHORT_VCC) Serial.println("FAULT: Thermocouple is short-circuited to VCC.");
   } else {

//  Routine Step.
  //  LCD "TEMP"
      display1.clear();
      display2.clear();
      display1.drawString(5,2,String(c,1)); 
      display1.display();

      ro = nt - bnt;
      ror = ro * 60;

      if (ror >= 0) {               //　RoR値：正
        display1.drawString(80,2,"+");
        display1.drawString(92,2,String(ror,0)); 
        display1.display();
        }
     else {                         //　RoR値：負
//      display1.drawString(80,2,"-");
      display1.drawString(80,2,String(ror,0)); 
      display1.display();
     }
      bnt = nt;

  // SERIAL "TEMP"
      Serial.println(c);

  // B/T "TIME+TEMP"
     SerialBT.print(MM_SS);
     SerialBT.print(" ");     
     SerialBT.print("Temp = ");
     SerialBT.print(c);
     SerialBT.println(" °C");

   }

// STOPWATCH Process

    delay_cntr = 0;

//  Starting Process.

    if (sw_id == 1) { 
      t_sec = t_sec + 1;
      sec_cntr = sec_cntr + 1;
   
//  MIN Info.
      if (min_cntr == 60) {
        min_cntr = 0;
        t_min = 0;
      }
//      
          
//  SEC Info.
      if (sec_cntr == 60) {
        sec_cntr = 0;
        t_sec = 0;
        min_cntr = min_cntr + 1;
        t_min = t_min + 1;

        snprintf(MM_work,4,"%02d",t_min);
        MM_SS[0] = MM_work[0];
        MM_SS[1] = MM_work[1];
      }
//
      snprintf(SS_work,4,"%02d",t_sec);
      MM_SS[3] = SS_work[0];
      MM_SS[4] = SS_work[1];
      display2.clear();
      display2.drawString(35,32,String(MM_SS)); 
      display2.display();    
      }
  }

//  SWITCH JUDGMENT
  if (digitalRead(stoppin) == HIGH) {
    //Stop
    sw_id = 0;
    min_cntr = 0;
    sec_cntr = 0;
    ESP.restart();
  }
  if (digitalRead(startpin) == HIGH && sw_id == 0) {  
    // Start
    sw_id = 1;

  }
//  TIME (time/conter setting) 
  delay(10);
  delay_cntr = delay_cntr + 10;
}