Arduino 温度警報装置 - kuroの覚え書き

大学の研究室の植物栽培室の室温監視用の警報付き温度計を作った。



#include <LiquidCrystal.h>

int ledPin0 = 12;      //LED signal

int alertPin = 13;      //alert signal

int analogPin0 = 0;   //LM35DZ input

int analogPin1 = 1;  //Low limit input

int analogPin2 = 2;  //High limit input
int val = 0;        //input data from LM35DZ

int val1 = 0;      //input data from Low limit dial

int val2 = 0;    //input data from High limit dial

int summary; // summary of input data

int i;

double t_value; //temperature value

int t_1;

int t_2;

// LiquidCrystal display with:

// rs on pin 2

// rw on pin 3

// enable on pin 4

// d4, d5, d6, d7 on pins 5, 6, 7, 8

LiquidCrystal lcd(2, 3, 4, 5, 6, 7, 8);
void setup()

{

  pinMode(ledPin0, OUTPUT); 

  pinMode(alertPin, OUTPUT);

  Serial.begin(9600);

  lcd.clear();

}
void loop()

{

  

  val1 = analogRead(analogPin1); // Low limit ??????????????

  val2 = analogRead(analogPin2); // High limit ??????????????

  summary = 0;

  for(i=0;i<50;i++)

  {

  val = analogRead(analogPin0);  //read data from analog0 pin

  summary = summary + val;

  delay(40);

  }
  t_value = (double)(summary)/50.0*4.9/1024.0*100.0-4;

  t_1 = (int)(t_value);

  t_2 = (int)((t_value - (double)t_1) * 100.0);
  if (val1/20 > t_value)

  {

    digitalWrite(alertPin, HIGH);   // sets the alert on

    digitalWrite(ledPin0, LOW);   // sets the LED on

  }

  else 

  {

    if (t_value > val2/20)

    {

    digitalWrite(alertPin, HIGH);   // sets the alert on

    digitalWrite(ledPin0, LOW);   // sets the LED on

    }

  else 

    {

    digitalWrite(alertPin, LOW);   // sets the alert off

    digitalWrite(ledPin0, HIGH);   // sets the LED on

    }

  }

  DispLCD();

  WriteSerial();
}
void DispLCD()

{

  lcd.clear();

  lcd.setCursor(0,0);

  lcd.print("Now Temp = ");

  lcd.print(t_1);

  lcd.print(".");

  lcd.print(t_2);

  

  lcd.setCursor(0,1);

  lcd.print("Lo:");

  lcd.print(val1/20);

  

  lcd.setCursor(9,1);

  lcd.print("Hi:");

  lcd.print(val2/20);

}


void WriteSerial()

{

  Serial.print(t_1);

  Serial.print(".");

  Serial.println(t_2);

}