Arduino remote hack using esp8266 (NodeMCU) and some relays

main.cpp

#include <Arduino.h>
#include <ESP8266WiFi.h>

char ssid[] = "An Wi-Fi";
char pass[] = "xxx";

int status = WL_IDLE_STATUS;

#define BUTTON1_ON_PIN  D1
#define BUTTON1_OFF_PIN D2
#define BUTTON2_ON_PIN  D3
#define BUTTON2_OFF_PIN D4
#define BUTTON3_ON_PIN  D7
#define BUTTON3_OFF_PIN D8

#define ASSERT_OFF HIGH
#define ASSERT_ON LOW

#define SLEEP_MS 1000

WiFiServer server(1337);

void setup()
{
  Serial.begin(115200);

  Serial.println();
  Serial.println();

  Serial.print("Starting...") ;

  pinMode(LED_BUILTIN, OUTPUT);

  pinMode(BUTTON1_ON_PIN, OUTPUT);
  pinMode(BUTTON1_OFF_PIN, OUTPUT);
  pinMode(BUTTON2_ON_PIN, OUTPUT);
  pinMode(BUTTON2_OFF_PIN, OUTPUT);
  pinMode(BUTTON3_ON_PIN, OUTPUT);
  pinMode(BUTTON3_OFF_PIN, OUTPUT);
/*
  digitalWrite(BUTTON1_ON_PIN,  ASSERT_ON);
  digitalWrite(BUTTON1_OFF_PIN, ASSERT_ON);
  digitalWrite(BUTTON2_ON_PIN,  ASSERT_ON);
  digitalWrite(BUTTON2_OFF_PIN, ASSERT_ON);
  digitalWrite(BUTTON3_ON_PIN,  ASSERT_ON);
  digitalWrite(BUTTON3_OFF_PIN, ASSERT_ON);

  delay(200);
*/
  digitalWrite(BUTTON1_ON_PIN,  ASSERT_OFF);
  digitalWrite(BUTTON1_OFF_PIN, ASSERT_OFF);
  digitalWrite(BUTTON2_ON_PIN,  ASSERT_OFF);
  digitalWrite(BUTTON2_OFF_PIN, ASSERT_OFF);
  digitalWrite(BUTTON3_ON_PIN,  ASSERT_OFF);
  digitalWrite(BUTTON3_OFF_PIN, ASSERT_OFF);

  WiFi.begin(ssid, pass);

  while ( WiFi.status() != WL_CONNECTED)
  {
    Serial.print("Attempting to connect to WPA SSID: ");
    Serial.println(ssid);

    String szStatus = String(WiFi.status());
    Serial.println("WiFi status: " + szStatus);

    delay(2000);
  }

  server.begin();

  Serial.println("Setup done, ip address: " + WiFi.localIP().toString());

  digitalWrite(LED_BUILTIN, LOW);
  delay(1000);
  digitalWrite(LED_BUILTIN, HIGH);
}

void handleCommand(char cmd)
{
  if (cmd == 'n')
  {
    Serial.println("turning lights off");

    digitalWrite(BUTTON1_OFF_PIN, LOW);
    delay(SLEEP_MS);
    digitalWrite(BUTTON1_OFF_PIN, HIGH);
    delay(SLEEP_MS);
    digitalWrite(BUTTON2_OFF_PIN, LOW);
    delay(SLEEP_MS);
    digitalWrite(BUTTON2_OFF_PIN, HIGH);

  }
  else if (cmd == 'y')
  {
    Serial.println("turning lights on");

    digitalWrite(BUTTON1_ON_PIN, LOW);
    delay(SLEEP_MS);
    digitalWrite(BUTTON1_ON_PIN, HIGH);
    delay(SLEEP_MS);
    digitalWrite(BUTTON2_ON_PIN, LOW);
    delay(SLEEP_MS);
    digitalWrite(BUTTON2_ON_PIN, HIGH);

  }
  else if (cmd == 'a')
  {
    Serial.println("turning tv lights on");

    digitalWrite(BUTTON1_ON_PIN, ASSERT_ON);
    delay(SLEEP_MS);
    digitalWrite(BUTTON1_ON_PIN, ASSERT_OFF);
  }
  else if (cmd == 'b')
  {
    Serial.println("turning tv lights off");

    digitalWrite(BUTTON1_OFF_PIN, LOW);
    delay(SLEEP_MS);
    digitalWrite(BUTTON1_OFF_PIN, HIGH);
  }
  else if (cmd == 'c')
  {
    Serial.println("turning stairs lights on");

    digitalWrite(BUTTON2_ON_PIN, LOW);
    delay(SLEEP_MS);
    digitalWrite(BUTTON2_ON_PIN, HIGH);
  }
  else if (cmd == 'd')
  {
    Serial.println("turning stairs lights off");

    digitalWrite(BUTTON2_OFF_PIN, LOW);
    delay(SLEEP_MS);
    digitalWrite(BUTTON2_OFF_PIN, HIGH);
  }
  else if (cmd == 'e')
  {
    Serial.println("turning upstairs lights on");

    digitalWrite(BUTTON3_ON_PIN, LOW);
    delay(SLEEP_MS);
    digitalWrite(BUTTON3_ON_PIN, HIGH);
  }
  else if (cmd == 'f')
  {
    Serial.println("turning upstairs lights off");

    digitalWrite(BUTTON3_OFF_PIN, LOW);
    delay(SLEEP_MS);
    digitalWrite(BUTTON3_OFF_PIN, HIGH);
  }
  else
  {
    Serial.println("unknown command");
  }
}

void loop()
{
  WiFiClient client = server.available();

  if (!client)
  {
    delay(200);
  }

  if (client)
  {
    while (client.connected())
    {
      Serial.println("got client");

      if (client.available())
      {
        handleCommand(client.read());
      }

      client.stop();

      digitalWrite(LED_BUILTIN, LOW);
      delay(1000);
      digitalWrite(LED_BUILTIN, HIGH);
    }
  }
}