#include <OneWire.h>
#include <DS18B20.h>
#include <EEPROM.h>
#include <Wire.h>
#include <JC_Button.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#define ONE_WIRE_BUS 2
byte sensorAddress[8] = {0x28, 0x9A, 0x47, 0xE1, 0x06, 0x00, 0x00, 0xCF};
OneWire oneWire(ONE_WIRE_BUS);
DS18B20 sensors(&oneWire);
#define OLED_RESET 4
Adafruit_SSD1306 display(OLED_RESET);
#if (SSD1306_LCDHEIGHT != 64)
#error("Height incorrect, please fix Adafruit_SSD1306.h!");
#endif
#define encoder_clk 2 //Arduino UNO (nano) pin 10
#define encoder_dt 3 //Arduino UNO (nano) pin 11
#define Fan_relay1 0 //Arduino UNO (nano) pin A0
#define Fan_relay2 1
#define temperatureSetupMode 12 //Rotary encoder SWITCH (SW) - button (menu entry)
volatile byte A = 0;
volatile byte B = 0;
volatile float encoder = 0;
volatile byte encoder_read = 0;
volatile uint8_t PORTB_default = 0xFF;
#define DEBOUNCE_MS 20 //debounce 20 ms
#define REPEAT_FIRST 1000 //ms required before repeating on long press
#define REPEAT_INCR 200 //repeat interval for long press
#define PULLUP true //To keep things simple, we use the Arduino's internal pullup resistor.
#define INVERT true
#define LONG_PRESS 2000 //long press to menu entry (2 seconds)
Button btn_setup(temperatureSetupMode, PULLUP, INVERT, DEBOUNCE_MS);
float Temp_regulation1;
float Temp_regulation2;
float Temp;
//int relay_state = 0;
enum STATES
{
Init,
Idle,
MEASURE_REGULATION, //measuring and temperature regulation
//MEASURE_REGULATION T2
SETUP, // setup
};
STATES state;
void setup() {
display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
display.clearDisplay();
sensors.begin(12);
sensors.request(sensorAddress);
pinMode(Fan_relay1,OUTPUT);
pinMode(Fan_relay2,OUTPUT);
pinMode(encoder_clk,INPUT_PULLUP);
pinMode(encoder_dt,INPUT_PULLUP);
state = MEASURE_REGULATION ;
read_EEPROM(Temp_regulation1);
read_EEPROM(Temp_regulation2);
encoder = Temp_regulation*10;
//PIN CHANGE INTERRUPT on encoder_clk and encoder_dt pins
PCICR |=(1<<PCIE0);
PCMSK0 |= (1<<PCINT2) | (1<<PCINT3);
sei();
)
void loop()
{
state_change();
input_check();
temp_measuring();
}
//PIN change (encoder pins) interrupt routine
ISR(PCINT0_vect)
{
uint8_t PORTB_change;
PORTB_change = PINB ^ PORTB_default;
PORTB_default = PINB;
if(PORTB_change & (1 << PINB2))//change on PCINT2
{
encoder_read = PINB & 0xC;
if(encoder_read == B00001100 && A) {
encoder--;
B = 0;
A = 0;
}
else if (encoder_read == B00000100) B = 1;
}
if(PORTB_change & (1 << PINB3))//change on PCINT3
{
encoder_read = PINB & 0xC;
if (encoder_read == B00001100 && B) {
encoder++;
B = 0;
A = 0;
}
else if (encoder_read == B00001000) A = 1;
}
}
void state_change()
{
switch (state)
{
case Init:
digitalWrite(Fan_relay1,LOW);
digitalWrite(Fan_relay2,LOW);
state = Idle;
case Idle:
break;
case MEASURE_REGULATION:
display.clearDisplay();
display.setTextSize(3);
display.setTextColor(WHITE);
display.setCursor(30,20);
display.println(sensors.getTempCByIndex(0));
display.display();
delay(2000);
display.clearDisplay();
void input_check()
{
btn_setup.read(); //read rotary encoder switch (SW pin)
switch (state)
{
case MEASURE_REGULATION:
regulation();
if (btn_setup.pressedFor(LONG_PRESS)) //long press encoder switch to enter setup
{
display.clearDisplay(;
state = SETUP;
}
break;
case SETUP:
digitalWrite(Fan_relay1,LOW); //relay1 OFF
digitalWrite(Fan_relay2,LOW);
Temp_regulation = encoder / 10;
if (Temp_regulation > 55.0)
{
Temp_regulation = 5.0;
}
if (Temp_regulation < 5.0)
{
Temp_regulation = 55.0;
}
if (btn_setup.wasPressed())
{
display.clearDisplay();
write_EEPROM(0, Temp_regulation);
state = MEASURE_REGULATION;
}
break;
}
}
void temp_measuring()
{
if (sensors.available())
{
Temp = sensors.readTemperature(sensorAddress);
sensors.request(sensorAddress);
}
}
void write_EEPROM(int address, float Temp_regulation)
{
byte* p = (byte*)(void*)&Temp_regulation;
for (int i = 0; i < sizeof(Temp_regulation); i++)
EEPROM.write(address++, *p++);
display.setCursor(30,20);
display.println("Saved!!!");
delay(1000);
display.clearDisplay();
}
float read_EEPROM(int address)
{
byte* p = (byte*)(void*)& Temp_regulation;
for (int i = 0; i < sizeof(Temp_regulation); i++)
*p++ = EEPROM.read(address++);
return Temp_regulation;
if (isnan(Temp_regulation))
{
Temp_regulation=22.2;
}
}
void regulation()
{
if (Temp <= Temp_regulation)
{
digitalWrite(Fan_relay1,HIGH); //relay1 ON
}
else if (Temp >= Temp_regulation)
{
digitalWrite(Fan_relay1,LOW); //relay1 OFF
}
}
