Stap 3: De Code
De code maakt gebruik van de volgende bibliotheken (en alles dankzij de auteurs van deze bibliotheken):
- OneButton: http://www.mathertel.de/Arduino/OneButtonLibrary.a...
- DHT11: http://playground.arduino.cc/main/DHT11Lib
- Timer: https://github.com/JChristensen/Timer
- EEPROM & LiquidCrystal: beide deel uitmaken van de Arduino IDE
#include "OneButton.h" #include "EEPROM.h" #include "Timer.h" #define RELAY1 A1 // Connect humidifier to Relay1 #define RELAY2 A2 // Connect heater to Relay2 #define TEMP_SET 25 // Starting Temperature #define MAX_TEMP 30 // Max Temperature #define HUM_SET 40 // Threshold humidity #define HUM_SET2 60 #define SWITCH_PIN A5 // Connect the switch between pin A5 and ground #define CYCLE 10 //Time in minutes for each cycle #include "LiquidCrystal.h" #define LCD_RS 11 // * LCD RS pin to digital pin 12 - Green #define LCD_EN 12 // * LCD Enable pin to digital pin 11 - Yellow #define LCD_D4 5 // * LCD D4 pin to digital pin 5 - Blue #define LCD_D5 6 // * LCD D5 pin to digital pin 6 - Blue #define LCD_D6 7 // * LCD D6 pin to digital pin 7 - Blue #define LCD_D7 8 // * LCD D7 pin to digital pin 8 - Blue #include "dht11.h" #define DHT11PIN 13 dht11 DHT11; LiquidCrystal lcd(LCD_RS, LCD_EN, LCD_D4, LCD_D5, LCD_D6, LCD_D7); int temp_set; Timer t; OneButton button1(SWITCH_PIN, true); void setup() { pinMode(DHT11PIN, INPUT); pinMode(LCD_RS, OUTPUT); pinMode(LCD_EN, OUTPUT); pinMode(LCD_D4, OUTPUT); pinMode(LCD_D5, OUTPUT); pinMode(LCD_D6, OUTPUT); pinMode(LCD_D7, OUTPUT); pinMode(RELAY1, OUTPUT); pinMode(RELAY2, OUTPUT); lcd.begin(16, 2); Serial.begin(9600); if(EEPROM.read(0) >= MAX_TEMP+1){ EEPROM.write(0,TEMP_SET); temp_set=TEMP_SET; } else {temp_set=EEPROM.read(0);} lcd.print("Setpoint: "); lcd.print(temp_set); // Display the setpoint temperature for 2 sec delay(2000); checkTemp(0); t.every(60000*CYCLE,checkTemp,(void*)0); button1.attachClick(tempPlus); button1.attachPress(tempMinus); } void loop() { // put your main code here, to run repeatedly: button1.tick(); t.update(); } void tempPlus(){ Serial.println("Plus"); temp_set++; if (temp_set > MAX_TEMP) temp_set = TEMP_SET; // Cycle between TEMP_SET and MAX_TEMP lcd.clear(); lcd.print("Setpoint: "); lcd.print(temp_set); EEPROM.write(0,temp_set); delay(1000); checkTemp(0); } void tempMinus(){ Serial.println("Minus"); temp_set--; if (temp_set < TEMP_SET) temp_set = MAX_TEMP; // Cycle between TEMP_SET and MAX_TEMP lcd.clear(); lcd.print("Setpoint: "); lcd.print(temp_set); EEPROM.write(0,temp_set); delay(2000); checkTemp(0); } void checkTemp(void* context) { int chk = DHT11.read(DHT11PIN); // Serial.print("Read sensor: "); /* switch (chk) { case DHTLIB_OK: // Serial.println("OK"); break; case DHTLIB_ERROR_CHECKSUM: // Serial.println("Checksum error"); break; case DHTLIB_ERROR_TIMEOUT: // Serial.println("Time out error"); break; default: lcd.println("Unknown error"); break; }*/ lcd.setCursor(0, 0); Serial.println(DHT11.humidity); lcd.print("Humidity: "); lcd.print((float)DHT11.humidity, 2); lcd.setCursor(0, 1); lcd.print("Temp: "); lcd.print((float)DHT11.temperature, 2); Serial.println(DHT11.temperature); if(DHT11.humidity < HUM_SET2){ digitalWrite(RELAY1, HIGH); Serial.println("H1"); } if (DHT11.humidity > HUM_SET) { digitalWrite(RELAY1,LOW); Serial.println("H0"); } if(DHT11.temperature < temp_set){ digitalWrite(RELAY2, HIGH); Serial.println("T1"); } if (DHT11.temperature > temp_set){ digitalWrite(RELAY2,LOW); Serial.println("T0"); } }
