This code is written by Gayathri Gunasekaran from #mydigitalmaker Holiday Programme 2017

HomeSecuritySystem.ino

#include <ESPert.h>
ESPert espert;

const char *host = "www.espert.io";
String smartphone_key = "YourPhoneKey";
const char *ssid = "YourWiFiSSID";
const char *password = "YourWiFiPassword";

const int led1 = 2;
const int ir = 14;
const int switch1 = 12;
int value = 0;
int x = 0;                
int clearLCD = 0;       
int prev_state = 0;           
int calibrationTime = 10;
bool currentSwitch = true;

void setup()
{
  WiFi.begin(ssid,password);
  pinMode(ir, INPUT_PULLUP);
  pinMode(switch1, INPUT_PULLUP);
  pinMode(led1, OUTPUT);
  espert.init();
  espert.oled.init();
  delay(2000);
  espert.oled.clear();
  espert.oled.println(espert.info.getId());
  espert.oled.println();

  int mode = espert.wifi.init();

  if (mode == ESPERT_WIFI_MODE_CONNECT) {
    espert.println(">>> WiFi mode: connected.");
    espert.oled.println("WiFi: connected.");
    espert.oled.print("IP..: ");
    espert.oled.println(espert.wifi.getLocalIP());
  }
  else if (mode == ESPERT_WIFI_MODE_DISCONNECT) {
    espert.println(">>> WiFi mode: disconnected.");
    espert.oled.println("WiFi: not connected.");
  }
  else if (mode == ESPERT_WIFI_MODE_SMARTCONFIG) {
    espert.println(">>> WiFi mode: smart config.");
  }
  else if (mode == ESPERT_WIFI_MODE_SETTINGAP) {
    espert.println(">>> WiFi mode: access point.");
  }
}

void loop()
{
  espert.loop();
  int state = digitalRead(switch1);
  value = analogRead(ir);
  Serial.println(value);
  if (prev_state != state){clearLCD = 0;}
  if (state == HIGH) {
    if (x == 0) {
      x = 1;
      clearLCD = 0;
      espert.oled.clear();
      delay(2000);
      espert.oled.println("calibrating sensor... ");
      delay(10000);
      espert.oled.println(" done");
      espert.oled.println("SENSOR ACTIVE");
      delay(2000);
    }
    if (value < 1023) {
      value = analogRead(ir);
      Serial.println(value);
      clearLCD = 0;
      String message = "INTRUDER!" ;
      message.replace(String(" "), String("%20"));
      String path = "/MySmartphone/send?key=" + smartphone_key + "&message=" + message;
      espert.println(">>" + espert.wifi.getHTTP(host, path.c_str()) + "<<");
      espert.oled.println("INTRUDER!");
      digitalWrite(led1, HIGH);
      delay (2000);
    }

    else {
      if (clearLCD == 0) {
        digitalWrite(led1, LOW);
        espert.oled.clear();
        espert.oled.println("Nobody");
        clearLCD = 1;
      }
    }
  }
  else {
    if (value > 1023) {
      if (clearLCD == 0) {
        digitalWrite(led1, LOW);
        espert.oled.clear();
        espert.oled.println("OFF");
        clearLCD = 1;
      }
    }
    else {
      clearLCD = 0;
    }
  }

  prev_state = state;
  delay(10);
}