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SUBJECT [July 31, 2014] WIZnet Newsletter
[WIZnet e-Newsletter]  JULY 31, 2014
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Garage Door Opener

Getting stuck out in the rain without keys was the motivation for this project. It lets you trigger a garage door opener through a website hosted by an Arduino. With the Arduino connected to a wireless network, you can use your smart phone to connect to the webserver, enter a password, activate the garage door and get inside before getting drenched in the downpour.A MegunoLink Pro interface panel is used to configure the program: setting up to 10 passwords, which are stored in the device’s EEPROM.

The hardware is pretty simple:
- An Arduino Etherten : Fully compatible with the the Arduino Uno, the Etherten includes an ethernet module based on the Wiznet chip used in the official Arduino shield. You could also use an Arduino Uno + Ethernet shield or the Arduino Ethernet board for this project.
- A relay to activate the garage door opener. Most garage door motors have a low-voltage switch near the internal door to the garage. The relay works in parallel with this switch so the Arduino can activate the door without disrupting normal operation. Make sure the switch is low-voltage and safe before wiring anything up.
- A transistor turns the relay on and off. Any small signal transistor should do the job, such as the 2N2222 or 2N3904.

Source Code :

All the source code is available on BOX. Copies of required libraries are in the “Libraries” folder. The project is setup to build using our Visual Studio Arduino build tool, and it will work in the Arduino IDE as well.
-   Program.cpp is the heart of the program. This is where you’ll find the setup and loop functions which initialize serial command processing and the webserver.
-   Webserver.h/Webserver.cpp handles the web server, returning the page requested by the user. It supplies a form requesting the password and checks the submitted password against stored passwords. We use the reliable Webduino library to create the web server itself.
- CommandProcessing.h/CommandProcessing.cpp looks after processing of serial commands. The commands supported are:
-  init-pwdr: initializes the eeprom ready to store passwords. Any saved passwords are cleared.
-   list-pwdr: lists the passwords stored in the eeprom.
-  set-pwd [Password Slot] [Password]r: saves a new password in the eeprom. Here [Password Slot], a number from 1 to 10, sets the slot where the password is stored and [Password] is the password to be stored.

For more information

Led control and checking temperature of your room over internet via C# and Arduino

In this project he would like to demonstrate, how you can control a LED or anything else, and get temperature of your room over internet via C# with Arduino UNO and Arduino Ethernet Shiled.

To do this or some like this, you need the following stuffs.
1.  Arduino UNO board
2. Arduino Ethernet Shield
3. 1 x LM 335 temperature sensor
4. 1 x 2Kohm resistor
5. some cables
6. 1 x LED
7. RJ45 cable
8. USD cable
9. Internet
10. Router
LM 335 temperature sensor

As a temperature sensor, the circuit will read the temperature of the surrounding environment and relay this temperature to us back in degrees Kelvin.

The LM335 sensor outputs 10mV/°K. So if the LM335 is giving an output reading of 2.943 (which is 2943mV), then this is equivalent to a temperature of 294.3° Kelvin. All you have to do is take the output reading and divide it by 10 in order to get the temperature output reading. This output reading of 294.3° kelvin is equivalent to 70°F and 21.11°C.

The IC we will use to measure the temperature in this circuit is the LM335 IC. We will integrate this with the arduino to measure the temperature. The arduino will then read this measured value from the LM335 and translate into degrees kelvin, fahrenheit and celsius, which we will be able to read from the computer from the arduino serial monitor.

Components Needed to Build the LM335 Temperature Sensor Circuit
- Arduino Board
- LM335 Temperature Sensor IC
- Computer
- USB with type A and B connectors

 C# user interface

For more information

[YouTube] Arduino Data Logging to Google Docs (Spreadsheet)

Using Arduino and Ethernet Shield to send temperature data (LM35) to Google Spreadsheet.
Download project files here: http://jarkomdityaz.appspot.com/

go to YouTube

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