Smart Environmental Monitoring and Control System

				#include <Wire.h>
#include <Adafruit_SSD1306.h>
#include <Adafruit_GFX.h>
#include <Adafruit_BME680.h>

// Define the relay pins
#define RELAY1_PIN 25
#define RELAY2_PIN 26

// OLED display configuration
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET -1
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

// BME680 sensor configuration
Adafruit_BME680 bme;

// WiFi credentials
const char* ssid = "your_SSID";
const char* password = "your_PASSWORD";

// Thresholds for relay control
const float TEMP_THRESHOLD = 30.0; // Temperature threshold for relay 1 (in degrees Celsius)
const float HUMIDITY_THRESHOLD = 40.0; // Humidity threshold for relay 2 (in %)

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

// Initialize the OLED display
if (!display.begin(SSD1306_I2C_ADDRESS, OLED_RESET)) {
Serial.println(F("SSD1306 allocation failed"));
for (;;);
}
display.display();
delay(2000);
display.clearDisplay();

// Initialize the BME680 sensor
if (!bme.begin()) {
Serial.println("Could not find a valid BME680 sensor, check wiring!");
while (1);
}

// Set up the BME680 sensor
bme.setTemperatureOversampling(BME680_OS_8X);
bme.setHumidityOversampling(BME680_OS_2X);
bme.setPressureOversampling(BME680_OS_4X);
bme.setIIRFilterSize(BME680_FILTER_SIZE_3);
bme.setGasHeater(320, 150); // 320*C for 150 ms

// Initialize the relay pins
pinMode(RELAY1_PIN, OUTPUT);
pinMode(RELAY2_PIN, OUTPUT);

// Connect to Wi-Fi
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.println("Connecting to WiFi...");
}
Serial.println("Connected to WiFi");
}

void loop() {
// Perform a BME680 measurement
unsigned long endTime = bme.beginReading();
if (bme.endReading() != BME680_OK) {
Serial.println("Failed to perform reading");
return;
}

// Read data from the BME680 sensor
float temperature = bme.temperature;
float humidity = bme.humidity;
float pressure = bme.pressure / 100.0;
float gas = bme.gas_resistance / 1000.0;

// Display data on the OLED screen
display.clearDisplay();
display.setTextSize(1);
display.setTextColor(SSD1306_WHITE);
display.setCursor(0, 0);
display.print("Temp: ");
display.print(temperature);
display.println(" *C");

display.print("Humidity: ");
display.print(humidity);
display.println(" %");

display.print("Pressure: ");
display.print(pressure);
display.println(" hPa");

display.print("Gas: ");
display.print(gas);
display.println(" KOhms");

display.display();

// Control the relays based on sensor data
if (temperature > TEMP_THRESHOLD) {
digitalWrite(RELAY1_PIN, HIGH); // Turn on relay 1
} else {
digitalWrite(RELAY1_PIN, LOW); // Turn off relay 1
}

if (humidity < HUMIDITY_THRESHOLD) {
digitalWrite(RELAY2_PIN, HIGH); // Turn on relay 2
} else {
digitalWrite(RELAY2_PIN, LOW); // Turn off relay 2
}

// Wait for a second before the next loop
delay(1000);
}