Codebase 20230408

.vscode/arduino.json

+{
+    "sketch": "display_code.ino",
+    "board": "arduino:avr:leonardo",
+    "port": "/dev/tty.usbmodem1101"
+}
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display_code.ino

+#include <SoftwareSerial.h>
+#include <Time.h>
+#include <TimeLib.h>
+#include "Arduino.h"
+#include <Wire.h>
+
+#include "rgb_lcd.h"
+#include "DHT.h"
+
+// Defines
+#if defined(ARDUINO_ARCH_AVR)
+    #define debug  Serial
+#elif defined(ARDUINO_ARCH_SAMD) ||  defined(ARDUINO_ARCH_SAM)
+    #define debug  SerialUSB
+#else
+    #define debug  Serial
+#endif
+
+// Temperature and Humidity Sensor
+#define DHTTYPE DHT20 
+DHT dht(DHTTYPE);
+
+// RGB LCD controller
+rgb_lcd lcd;
+
+// Current temperature
+float temp = 0;
+
+void setup(){
+  // set up the LCD's number of columns and rows:
+  lcd.begin(16, 2);
+  //pinMode(6,OUTPUT); 
+
+  // initialize the serial communications:
+  Serial.begin(9600);
+
+  // For debug purposes -- set the time
+  setTime(17,43,0,8,5,23);
+
+  debug.begin(115200);
+  debug.println("DHTxx test!");
+
+  Wire.begin();
+
+  time_t t = now();
+
+  dht.begin();
+  float initialTemp[2] = {0};
+  dht.readTempAndHumidity(initialTemp);
+  temp = initialTemp[1];
+  
+}
+
+void loop(){
+    int joyStick1  = analogRead(A0); // Reads in the joyStick state
+
+    float newTemp[2] = {0};
+    dht.readTempAndHumidity(newTemp);
+    float currentTemp = newTemp[1]; //Takes in the current room temperature
+      
+    if(currentTemp > (temp + 3)){
+      int joyStick3  = analogRead(A0);
+      if(joyStick3 != 1022){
+        highTemp(); //Alerts the user if the room temperature is too hot. "10*C over the initial room temperature is being considered as too hot"
+        Serial.println(currentTemp);
+      }
+    }
+    
+    if (joyStick1 == 1022){ //Joystick has been pushed down
+
+      for(int count = 0; count < 100; count++){ //Timer to keep the display on
+
+        int joyStick2  = analogRead(A0); //Takes in the joystick reading in again
+        
+        if(joyStick2 == 1022 ) { //If Joystick has been clicked again, the Temperature and Humidity will be displayed
+          lcd.display(); //Turns on the display
+          printDHT(); // Temperature and Humidity is displayed
+          delay(3000);  
+          lcd.clear(); //Clears the screen
+        } else {
+          lcd.display(); 
+          digitalClockDisplay();//Date and time printed
+          delay(1000);  
+          lcd.clear(); //Clears the screen
+        }  
+      }
+    }else{
+      lcd.noDisplay();
+    }  
+  
+}
+void digitalClockDisplay()
+{
+  // Displays the Date and time 
+  lcd.print(hour());
+  printDigits(minute());
+  printDigits(second());
+  lcd.print(" ");
+  lcd.setCursor(0, 1); //Moves the cursor down, so the date is on the second line
+  lcd.print(day());
+  lcd.print(" ");
+  lcd.print(month());
+  lcd.print(" ");
+  lcd.print(year());
+  
+}
+void printDigits(int digits)
+{
+  lcd.print(":");
+  if(digits < 10)
+    lcd.print('0');
+  lcd.print(digits);  
+}
+
+void printDHT(){
+
+    float temp_hum_val[2] = {0};
+    if (!dht.readTempAndHumidity(temp_hum_val)) { //reads in the Temperature and Humidity of the room
+        lcd.print("Humidity: ");
+        lcd.print(temp_hum_val[0]);
+        lcd.print(" %\t");
+        
+        lcd.setCursor(0, 1);
+        lcd.print("Temp: ");
+        lcd.print(temp_hum_val[1]);
+        lcd.print("C");
+    } else {
+        debug.println("Failed to get temprature and humidity value.");
+    }
+
+    delay(1500);
+
+}
+
+
+void highTemp(){
+  lcd.clear();
+  lcd.display();
+  lcd.setRGB(255,0,0); //Sets the colour of the LCD screen to be red
+  lcd.print("ROOM TOO HOT!!!");
+
+  digitalWrite(6,HIGH); // Sets the buzzer off
+  delay(3000);
+  digitalWrite(6,LOW);
+  delay(3000);
+
+  delay(7000);
+  lcd.setRGB(255,255,255); //Sets the colour of the LCD screen to be white
+  lcd.clear();
+  
+}
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