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	- Project: Smart Climate
	- Source Code NOT compiled for: ESP32 DevKit V1
	- Source Code created on: 2024-09-28 18:53:06

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
	/* Connect to wifi, print ip address on first line of */
	/* display, monitor temperatures and humidity for all */
	/* 3 zones and print each sensor on a new line,  when */
	/* temperature lower than 21C, activate corresponding */
	/* relay, when temp over 23 C, turn off the relay */
/****** SYSTEM REQUIREMENT 2 *****/
	/* emulate a webserver that will print values for */
	/* each zone and include a toggle switch and for each */
	/* relay, in the webpage add the ability to turn on */
	/* relays based on temperature or a timer */
/****** END SYSTEM REQUIREMENTS *****/

/****** DEFINITION OF LIBRARIES *****/
#include <Wire.h>
#include <Relay.h>	//https://github.com/rafaelnsantos/Relay
#include <U8g2_for_Adafruit_GFX.h>	//https://github.com/olikraus/U8g2_for_Adafruit_GFX
#include <Adafruit_SSD1306.h> // Include the Adafruit SSD1306 library
#include <WiFi.h> // Include WiFi library
#include <WebServer.h> // Include WebServer library
#include <DHT.h> // Include DHT sensor library

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);
void updateOutputs();
void handleRoot(); // Function to handle root URL
void readSensors(); // Function to read temperature and humidity

/***** DEFINITION OF DIGITAL INPUT PINS *****/
const uint8_t Sensor1_DHT11_DOUT_PIN_D4		= 4;
const uint8_t Sensor2_DHT11_DOUT_PIN_D13		= 13;

/***** DEFINITION OF DIGITAL OUTPUT PINS *****/
const uint8_t Relay1_RelayModule_Signal_PIN_D16		= 16;
const uint8_t Relay2_RelayModule_Signal_PIN_D17		= 17;

/***** DEFINITION OF I2C PINS *****/
const uint8_t Display1_SSD1306OledDisplay_I2C_PIN_SDA_D21		= 21;
const uint8_t Display1_SSD1306OledDisplay_I2C_PIN_SCL_D22		= 22;
const uint8_t Display1_SSD1306OledDisplay_I2C_SLAVE_ADDRESS		= 60;

/***** DEFINITION OF OUTPUT RAW VARIABLES *****/
bool Relay1_RelayModule_Signal_PIN_D16_rawData		= 0;
bool Relay2_RelayModule_Signal_PIN_D17_rawData		= 0;

/***** DEFINITION OF OUTPUT PHYSICAL VARIABLES *****/
float Relay1_RelayModule_Signal_PIN_D16_phyData		= 0.0;
float Relay2_RelayModule_Signal_PIN_D17_phyData		= 0.0;

// DHT sensor instances
DHT dht1(Sensor1_DHT11_DOUT_PIN_D4, DHT11);
DHT dht2(Sensor2_DHT11_DOUT_PIN_D13, DHT11);

// Create relay instances for Relay1 and Relay2
Relay relay1(Relay1_RelayModule_Signal_PIN_D16, 1); // Relay on pin 16
Relay relay2(Relay2_RelayModule_Signal_PIN_D17, 1); // Relay on pin 17

// Create an instance of the Adafruit SSD1306 display
Adafruit_SSD1306 display(Display1_SSD1306OledDisplay_I2C_SLAVE_ADDRESS, Display1_SSD1306OledDisplay_I2C_PIN_SDA_D21, Display1_SSD1306OledDisplay_I2C_PIN_SCL_D22);

// Create an instance of the U8G2_FOR_ADAFRUIT_GFX class
U8G2_FOR_ADAFRUIT_GFX u8g2_for_adafruit_gfx;

// WiFi credentials
const char* ssid = "your_SSID"; // Replace with your WiFi SSID
const char* password = "your_PASSWORD"; // Replace with your WiFi Password

// Web server instance
WebServer server(80);

// Variables to store sensor readings
float temperature1, humidity1;
float temperature2, humidity2;

void setup(void)
{
	// Initialize serial communication
	Serial.begin(115200);

	// Connect to WiFi
	WiFi.begin(ssid, password);
	while (WiFi.status() != WL_CONNECTED) {
		delay(1000);
		Serial.println("Connecting to WiFi...");
	}
	Serial.println("Connected to WiFi");
	Serial.print("IP Address: ");
	Serial.println(WiFi.localIP());

	// Initialize the display
	display.begin(SSD1306_SWITCHCAPVCC); // Initialize the SSD1306 display
	u8g2_for_adafruit_gfx.begin(display); // Connect u8g2 procedures to Adafruit GFX

	// Initialize relays
	relay1.setRelayMode(relayModeAutomatic); // Set relay1 to automatic mode
	relay2.setRelayMode(relayModeAutomatic); // Set relay2 to automatic mode

	// Initialize DHT sensors
	dht1.begin();
	dht2.begin();

	// Set up web server routes
	server.on("/", handleRoot);
	server.begin();
}

void loop(void)
{
	// Refresh output data
	updateOutputs(); 
	relay1.loop(); // Call loop function for relay1
	relay2.loop(); // Call loop function for relay2

	// Read sensors
	readSensors();

	// Example of using the display
	display.clearDisplay(); // Clear the display
	u8g2_for_adafruit_gfx.setFont(u8g2_font_helvR14_tf); // Set font
	u8g2_for_adafruit_gfx.setCursor(0, 20); // Set cursor position
	u8g2_for_adafruit_gfx.print("IP: ");
	u8g2_for_adafruit_gfx.print(WiFi.localIP()); // Print IP address
	u8g2_for_adafruit_gfx.setCursor(0, 40); // Set cursor position
	u8g2_for_adafruit_gfx.print("T1: "); u8g2_for_adafruit_gfx.print(temperature1); u8g2_for_adafruit_gfx.print("C");
	u8g2_for_adafruit_gfx.setCursor(0, 60); // Set cursor position
	u8g2_for_adafruit_gfx.print("T2: "); u8g2_for_adafruit_gfx.print(temperature2); u8g2_for_adafruit_gfx.print("C");
	display.display(); // Display the content
	delay(2000); // Wait for 2 seconds

	// Handle client requests
	server.handleClient();
}

void updateOutputs()
{
	// Control relays based on temperature thresholds
	if (temperature1 < 21) {
		Relay1_RelayModule_Signal_PIN_D16_rawData = 1; // Turn on relay 1
	} else if (temperature1 > 23) {
		Relay1_RelayModule_Signal_PIN_D16_rawData = 0; // Turn off relay 1
	}

	if (temperature2 < 21) {
		Relay2_RelayModule_Signal_PIN_D17_rawData = 1; // Turn on relay 2
	} else if (temperature2 > 23) {
		Relay2_RelayModule_Signal_PIN_D17_rawData = 0; // Turn off relay 2
	}

	digitalWrite(Relay1_RelayModule_Signal_PIN_D16, Relay1_RelayModule_Signal_PIN_D16_rawData);
	digitalWrite(Relay2_RelayModule_Signal_PIN_D17, Relay2_RelayModule_Signal_PIN_D17_rawData);
}

void readSensors() {
	// Read temperature and humidity from DHT sensors
	humidity1 = dht1.readHumidity();
	temperature1 = dht1.readTemperature();
	humidity2 = dht2.readHumidity();
	temperature2 = dht2.readTemperature();
}

void handleRoot() {
	// Handle root URL and send HTML response
	server.send(200, "text/html", "<h1>Temperature and Humidity</h1><p>Zone 1: T: " + String(temperature1) + "C, H: " + String(humidity1) + "%</p><p>Zone 2: T: " + String(temperature2) + "C, H: " + String(humidity2) + "%</p>");
}

/* END CODE */