Published February 4, 2017 © GPL3+

(Updated More Advanced) Simple Arduino Home Security

This project uses Arduino, Raspberry Pi, and Telegram app, to create a home security system.

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(Updated More Advanced) Simple Arduino Home Security

Things used in this project

Hardware components

Arduino Nano R3

PIR Motion Sensor (generic)

5 mm LED: Red

5 mm LED: Yellow

5 mm LED: Green

Resistor 1k ohm

Reed Switch

Raspberry Pi 3 Model B

Hand tools and fabrication machines

Soldering iron (generic)

project enclosure

Story

Home Security

The Project

I've been interested in building a complete home security system for some time, this being only part of the system. Using a cheap door alarm from the Dollar Tree, I found out that it uses a reed switch. Thus, I scraped off the connections to the rest of the circuit. You will need to cut two wires the length you need depending on your setup. Measure out the length of wire you will need. Solder your wires to each side as the circuit diagram shows. You could use the annoying alarm if you wanted, just make the connections and be sure to use a resistor when connecting to Arduino. All connections are shown in the circuit diagram.

(updated)

This update uses the same Arduino code and functionality of it. But instead of connecting to the Windows computer I decided to connect it to my recently purchased Raspberry Pi 3. I searched the web for a good startup for the Arduino IDE and serial access. There are several write ups on how to get started, too many to list.

Next download the telegram app and set up your bot. Get your token and enter it in the python code where it states. I chose to use the Python Requests module, you can use other modules or libraries, this one has worked best for me. I've only had a few errors thrown from not talking to my bot or internet drop outs. Now you should be good to go. Bots are very functional and easy to program. Thanks for reading and enjoy your newly setup bot and security set up!!

Code

#define redled 6
#define greled 7
#define yelled 8

#define PIR 5
#define reed 4


// timer for alerts to print every minute(60s)
long minSecsBetweenAlerts = 600000L; //1 min = 60s so 1 sec equals 1000millis
long intervalN = 60000L;
long start = 0;

void setup() {
  pinMode(redled, OUTPUT);
  pinMode(greled, OUTPUT);
  pinMode(yelled, OUTPUT);
  pinMode(reed, INPUT_PULLUP);
  pinMode(PIR, INPUT_PULLUP);
  Serial.begin(9600);
}

void loop() {
  //sensor readings could be high or low depending on the sensors used
  unsigned long now = millis();
  int trig = digitalRead(reed);
  if(trig == LOW){
    Serial.print("closed");
    digitalWrite(greled, HIGH);
  }
  if(trig == HIGH){
    if(now - start >= minSecsBetweenAlerts) {
    start = now;
    Serial.print("open");
    digitalWrite(redled, HIGH);
    delay(50);
    digitalWrite(redled, LOW);
    delay(100);
    digitalWrite(yelled, HIGH);
    delay(50);
    digitalWrite(yelled, LOW);
    delay(100);
    digitalWrite(greled, LOW);
    delay(50);
    digitalWrite(greled, HIGH);
  } else {
    Serial.println("still open");
  }
  
  long now = millis();
  int motion = (digitalRead(PIR));
  if(motion == HIGH) {
    if(now - start >= intervalN){
      Serial.println("Motion Detected");
      digitalWrite(redled, HIGH);
      start = now;
    }
    else{
      Serial.print("nothing yet");
      digitalWrite(redled, LOW);
    }
    delay(250);
  }
  }  
}

import requests
import serial
import subprocess
import time
import smtplib
import os
from datetime import datetime

now = datetime.now()
url = "https://api.telegram.org/bot{yourBOTIDhere}/"
#regardless of the code if you have internet dropouts errors will throw
#this has worked well for me

def get_url(url):
    response = resquests.get(url)
    content = response.content.decode("utf8")
    return content
def get_json_from_url(url):
    content = get_url(url)
    js = json.loads(content)
    return js
def get_updates_json(request):
    params = {'timeout': 100, 'offset':None}
    response = requests.get(request + 'getUpdates', data = params)
    return response.json()
def last_update(data):  
    results = data['result']
    total_updates = len(results) - 1
    return results[total_updates]
def get_chat_id(update):  
    chat_id = update['message']['chat']['id']
    return chat_id
def send_mess(chat, text):  
    params = {'chat_id': chat, 'text': text}
    response = requests.post(url + 'sendMessage', data=params)
    return response

def send_pic(chat, files):
    files = {'photo': open('/home/pi/webcam/t.jpg', 'rb')}
    data =  {'chat_id': chat}
    response = requests.post(url + 'sendPhoto' , files = files, data=data)
    #print(response.url)
    print(response.status_code)
    print(response.text)
    return response

def take_pic():
    #i will link code for webcam.sh small code for saving files
    subprocess.call("./webcam.sh", shell=True)
    f = open('/home/pi/webcam/t.jpg', 'rb')
    
   
    


chat_id = get_chat_id(last_update(get_updates_json(url)))
send_mess(chat_id, 'hello master')
take_pic()
files = open('/home/pi/webcam/t.jpg', 'rb')
chat_id = get_chat_id(last_update(get_updates_json(url)))


send_pic(chat_id, files)

while True:
                
                ser=serial.Serial('/dev/ttyUSB0',9600)
                message = ser.readline()
                print(message)
                if message[0:1] == 'M':
                        ser.close()
                        take_pic()
                        send_mess(chat_id, 'master someone is in your house')
                        send_pic(chat_id, files)
                        time.sleep(600)#use 600 
                        ser.open()
                        
        
                elif message[0:1] == 'o':
                        ser.close()
                        send_mess(chat_id, "Master someone opened your door")
                        time.sleep(600)
                        ser.open()
                        #exit()

Credits

TJ Blevins

3 projects • 5 followers

(Updated More Advanced) Simple Arduino Home Security

Things used in this project

Hardware components

Hand tools and fabrication machines

Story

Home Security

The Project

Schematics

ArduinoSecurity

Alarm Circuit

Code

ArduinoSecurity

workinBot

webcam

Credits

TJ Blevins

Comments

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(Updated More Advanced) Simple Arduino Home Security

(Updated More Advanced) Simple Arduino Home Security

Things used in this project

Hardware components

Hand tools and fabrication machines

Story

Home Security

The Project

Schematics

ArduinoSecurity

Alarm Circuit

Code

ArduinoSecurity

workinBot

webcam

Credits

TJ Blevins

Comments

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