main-esp8266-relay.cpp

/**
 * @file main.cpp
 * @brief ESP8266 Relay Controller
 *
 * This file contains the implementation of an ESP8266-based relay controller
 *
 * @details
 * - To install the ESP8266 board, (using Arduino 1.6.4+):
 *   - Add the following 3rd party board manager under "File -> Preferences -> Additional Boards Manager URLs":
 *     http://arduino.esp8266.com/stable/package_esp8266com_index.json
 *   - Open the "Tools -> Board -> Board Manager" and click install for the ESP8266
 *   - Select your ESP8266 in "Tools -> Board"
 *
 * @author Ives
 *
 * @section Dependencies
 * - ESP8266WiFi.h
 *
 * @section Configuration
 * - WiFi SSID and password
 * - MQTT server IP address
 *
 * @section Pins
 * - RELAY1: D7
 * - RELAY2: D6
 * - RELAY3: D5
 * - RELAY4: D0
 *
 * @section Functions
 * - setup_wifi(): Connects to the WiFi network.
 * - setup(): Initializes the hardware and connects to WiFi.
 * - loop(): Main loop that controls the relay.

 */

// Include the ESP8266 WiFi library
#include <ESP8266WiFi.h>

// Define the WiFi network
const char *ssid = "MyNetworkName";
const char *password = "PasswordForMyNetwork";

// Define the relay pins
const int RELAY1 = D7;
const int RELAY2 = D6;
const int RELAY3 = D5;
const int RELAY4 = D0;

// Create a WiFi client
WiFiClient espClient;

/**
 * @brief Connect to the WiFi network
 */
void setup_wifi()
{

  delay(10);
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  // Connect to the WiFi network
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);

  // Wait for the connection
  while (WiFi.status() != WL_CONNECTED)
  {
    delay(500);
    Serial.print(".");
  }

  // Print the IP address
  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}

void setup()
{
  // Initialize the relay pins
  pinMode(RELAY1, OUTPUT);
  pinMode(RELAY2, OUTPUT);
  pinMode(RELAY3, OUTPUT);
  pinMode(RELAY4, OUTPUT);

  // Initialize the serial port
  Serial.begin(115200);

  // Connect to the WiFi network
  setup_wifi();
}

void loop()
{

  digitalWrite(RELAY4, HIGH); // Turn the relay on
  delay(1000);                // Wait for 1 second
  digitalWrite(RELAY4, LOW);  // Turn the relay off
  delay(1000);                // Wait for 1 second
}