Skip to content

Instantly share code, notes, and snippets.

@hmasum52

hmasum52/smart-home.ino

Last active August 21, 2022 17:13
Show Gist options
  • Save hmasum52/61a1d3d62da90d393d56dc4db3e6b5ff to your computer and use it in GitHub Desktop.
Save hmasum52/61a1d3d62da90d393d56dc4db3e6b5ff to your computer and use it in GitHub Desktop.
Download ZIP
Raw
smart-home.ino
#include <Wire.h> //Library for I2C communication
#include "LiquidCrystal_I2C.h" //I2C LCD library
#include<Servo.h>
#include "DHT.h"
#include <SoftwareSerial.h>
// HC-SR04 : sonar sensor
#define TRIGPIN 5
#define ECHOPIN 6
#define BUZZERPIN 12//pore dibo
#define FLAME_SENSORPIN 2
#define SMOKE_SENSOR_PIN A1
#define LED_PIN 13//pore dibo
#define LDR_PIN A0
// temperature and humidity sensor
#define DHTPIN 4
#define DHTTYPE DHT11
// hc-05 pin
#define HCO5PIN_RX_PIN 3
#define HCO5PIN_TX_PIN 4 //change kore tx rx e disi..
#define DOOR_OPEN_ANGLE 70
#define DOOR_CLOSE_ANGLE 140
#define RXgsm 10
#define TXgsm 11
const uint32_t GSMBaud = 115200;
SoftwareSerial gsmSerial(RXgsm, TXgsm);
long duration;
float distance;
int buzzerOn = 0;
bool autoOpenDoor = true;
bool ledOn = false;
bool ldrOn = true;
int ldrThreshold = 100;
//Bracket er moddhe prothom ta I2C Scanner code diye address ta scan kore niye boshabo,
//ar baki duita LCD er dimension
LiquidCrystal_I2C lcd(0x3F, 16, 2); // file/examples/wire/i2c_scanner
//servo configurations
Servo door_servo;
int pos=0; //Servo ke initially leftmost position e rakhlam
DHT dht(DHTPIN, DHTTYPE);
void sendMessage(String msg)
{
gsmSerial.println("AT+CMGF=1"); //Sets the GSM Module in Text Mode
delay(1000); // Delay of 1000 milli seconds or 1 second
gsmSerial.println("AT+CMGS=\"+8801986283829\"\r"); // Replace x with mobile number
delay(1000);
Serial.print(" Sending SMS!");
gsmSerial.println(msg);// The SMS text you want to send
delay(100);
gsmSerial.println((char)26);// ASCII code of CTRL+Z
delay(1000);
}
void setup() {
// put your setup code here, to run once:
gsmSerial.begin(GSMBaud);
Serial.begin(9600);
pinMode(TRIGPIN,OUTPUT);
pinMode(ECHOPIN,INPUT);
pinMode(FLAME_SENSORPIN,INPUT);
pinMode(LED_PIN, OUTPUT);
pinMode(BUZZERPIN,OUTPUT);
lcd.begin();
lcd.backlight();
lcd.print("Measuring ");
lcd.setCursor(2,3);
lcd.print("temperature");
delay(1000);
lcd.clear();
door_servo.attach(9);
dht.begin();
}
void listenAppInput(){
if (Serial.available()) /* If data is available on serial port */
{
char data = Serial.read();
Serial.print("input: ");
Serial.println(data);
switch (data) {
case '0': {
autoOpenDoor = false;
door_servo.write(DOOR_CLOSE_ANGLE);
break;
}
case '1': {
autoOpenDoor = true;
break;
}
case '2': {
ledOn = true;
ldrOn = false;
Serial.println("LDR Off, LED On");
break;
}
case '3': {
ledOn = false;
ldrOn = false;
Serial.println("LDR Off, LED Off");
break;
}
case '4': {
ledOn = false;
ldrOn = true;
Serial.println("LDR On with threshold " + ldrThreshold);
break;
}
case '5': {
ldrOn = true;
ldrThreshold = (char) Serial.read();
ldrThreshold *= 8;
Serial.println("LDR Threshold Changed to: " + (ldrThreshold));
break;
}
}
}
}
/**
* https://howtomechatronics.com/tutorials/arduino/ultrasonic-sensor-hc-sr04/
*/
void openDoor(){
digitalWrite(TRIGPIN,LOW);
delayMicroseconds(2);
digitalWrite(TRIGPIN,HIGH);
delayMicroseconds(10);
digitalWrite(TRIGPIN,LOW);
duration=pulseIn(ECHOPIN,HIGH);
distance=duration*0.017;
Serial.print("Distance: ");
Serial.print(distance);
Serial.print("\n");
//door open er code
//delay(500);
door_servo.write(distance<10 ? DOOR_OPEN_ANGLE : DOOR_CLOSE_ANGLE);
}
void ldrLightControl(){
//ldr portion
int ldrvalue=analogRead(LDR_PIN);
Serial.print("Ldr: ");
Serial.print(ldrvalue);
Serial.print("\n");
digitalWrite(LED_PIN, ldrvalue<ldrThreshold);
}
void alert(String op) {
buzzerOn = max(buzzerOn, 5);
digitalWrite(BUZZERPIN, buzzerOn);
Serial.print(" Fire Alert!");
door_servo.write(DOOR_OPEN_ANGLE);
sendMessage(op+" detected in your house, emergency door open...");
}
void detectFire(){
//flame sensor_eikhane kono analog output pin nai. tai arduino er digital pin ekta te input nibo
//Flame sensor activate hoile 0 output dey ar naile 1 output dey
int flame=digitalRead(FLAME_SENSORPIN);
Serial.print("flame: ");
Serial.print(flame);
Serial.print("\n");
delay(20);
if (!flame)
alert("Fire");
}
void detectSmoke(){
//Smoke sensor
int smoke=digitalRead(SMOKE_SENSOR_PIN);
Serial.print("Smoke: ");
Serial.print(smoke);
Serial.print("\n");
// Temparature Sensor er measurement er Code
delay(20);
if (!smoke)
alert("Gas/Smoke");
}
void measureTemperatureAndHumidity(){
///////////////////// DHT //////////////////
// Reading temperature or humidity takes about 250 milliseconds!
// Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
float h = dht.readHumidity();
// Read temperature as Celsius (the default)
float t = dht.readTemperature();
// Read temperature as Fahrenheit (isFahrenheit = true)
float f = dht.readTemperature(true);
// Check if any reads failed and exit early (to try again).
if (isnan(h) || isnan(t) || isnan(f)) {
Serial.println(F("Failed to read from DHT sensor!"));
return;
}
// Compute heat index in Fahrenheit (the default)
float hif = dht.computeHeatIndex(f, h);
// Compute heat index in Celsius (isFahreheit = false)
float hic = dht.computeHeatIndex(t, h, false);
String btLog = String(" Humidity: ");
btLog.concat(h);
btLog.concat(" Temperature: ");
btLog.concat(t);
Serial.println(btLog);
lcd.clear();
lcd.print("Humidity:");
lcd.print(h);
lcd.setCursor(0, 1);
lcd.print("Temp:");
lcd.print(t);
delay(1000);
}
void loop() {
buzzerOn = buzzerOn ? buzzerOn-1 : 0;
if (autoOpenDoor && !buzzerOn) openDoor();
measureTemperatureAndHumidity();
if (ldrOn) ldrLightControl();
else digitalWrite(LED_PIN, ledOn);
detectFire();
detectSmoke();
listenAppInput();
digitalWrite(BUZZERPIN, buzzerOn);
Serial.print("\n\n");
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment