Introduction: Arduino Web Server With Sensors

By plus.google.com/1102876021710341
About: kecsot

I made it for learn how to use the sensors.
And i want to turns on/off my ventillator if im not at home.
So if im not at home than i can watch my room status.

Later i want to make E-mail notification.
If you access your Arduino's ip in router forwarding (port:80) then you can connect to your Website everywhere are u.

If you want to made it you need:

  • Arduino Microcontroller
  • Ethernet Shield
  • DHT11 sensor
  • 4x4 matrix keypad
  • Raindrop sensor
  • Relay
  • Gas sensor
  • IR Flame sensor

The web server example: http://startingelectronics.com/tutorials/arduino/e...

Step 1: Relay. How to Work?

How to connect my lamp to Relay?
You can see the picture, its easy.

Relay connect to Arduino?
Relay -> Arduino
VCC -> 5V
GND -> GND
IN1 -> Choose a Digital Input

Arduino Program code:

#define RELAY1  6                       // Relay in Digital input 6
void setup() 
{       
pinMode(RELAY1, OUTPUT);        
}
 void loop()
{    
digitalWrite(RELAY1,LOW);          // Relay turns on
delay(2000);                                   // Wait 2 seconds
digitalWrite(RELAY1,HIGH);          // Relay turns off
delay(2000);                                   // Wait 2 seconds
}

Step 2: 4x4 Matrix Keypad. How to Work?

How to connect 4x4 Matrix KeyPad to Arduino?
First 4 pin: ( Connect to Digital inputs )
Its return back with the column number when you press a button.
The last 4 pin: ( Connect to Digital inputs )

Returns back with the row number.

byte colPin[4]={22,24,26,28};   // Column Pins
byte rowPin[4]={23,25,27,29};  // Rows Pins

Example:
You have a 4x4 matrix keypad. 

char keys[4][4]=
{'1','2','3','A'},  
{'4','5','6','B'},
{'7','8','9','C'},
{'*','0','#','D'}};

If you press the 2nd column and 2nd row button.
The program is write out the '5' in the serial port.


For Example:

#include 
 char keys[4][4]={
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}};
byte colPin[4]={22,24,26,28};
byte rowPin[4]={23,25,27,29};

Keypad keypad=Keypad(makeKeymap(keys),rowPin,colPin,4,4);

void setup()
{
     Serial.begin(9600);
     pinMode(8, OUTPUT);
}

void loop()
{
     char pressed=keypad.getKey();
     if(pressed) {
          Serial.println(pressed);
     }
}

Step 3: DHT11 Sensor. How to Use?



How to read templature and humidity?

For Example:

#include 

dht11 DHT11; 
#define DHT11PIN 3

void setup()
{    
    Serial.begin(9600);   
}

void loop()
{
      DHT11.read(DHT11PIN);  // This method is reading new humidity and temperature.
      Serial.print(DHT11.humidity, 1);
      Serial.println(DHT11.temperature, 1);
      delay(1000);
}

Step 4: Raindrop Sensor. How to Work?

How to connect the sensor with your Arduino?

OV -> Analog input
GND -> GND
VCC -> 5V

The Sensor Value:
The sensor is returns back with a value.
More than 1000: Its Dry
If less than 1000: its Wet

For Example:

void setup()
{
Serial.begin(9600);   
}
void loop() {
int sensorValue = analogRead(A0); // Its read a value. 
Serial.println(sensorValue);
delay(100);
}

Step 5: IR Flame Sensor. How to Work?

How to connect the sensor with your Arduino?
OV -> Analog input
GND -> GND
VCC -> 5V

The Sensor Value:
The sensor is returns back with a value.
About 900: Normal
If less: Detected Fire

For Example:

void setup()
{
Serial.begin(9600);   
}
void loop() {
int sensorValue = analogRead(A0); // Its read a value. 
Serial.println(sensorValue);
delay(100);
}

Step 6: MQ-2 Gas Sensor. How to Work?

How to connect the sensor with your Arduino?
OV -> Analog input
GND -> GND
VCC -> 5V

The Sensor Value:
The sensor is returns back with a value.
About 100: Normal
If more: Detected Gas

For Example: 

void setup()
{
Serial.begin(9600);   
}
void loop() {
int sensorValue = analogRead(A0); // Its read a value. 
Serial.println(sensorValue);
delay(100);
}

Thanks for Watching!