Send strings to LCD from web page

Send strings to LCD from web page:

Arduino board and Ethernet shield can serve as basic web server. With limited Arduino resources you can run simple web pages where you can send variable data and also read them back to Arduino. This is convenient when you want to have convenient control panel and remote access.

So following project actually is a simple demonstration how to enter couple text strings via web page and display them on LCD attached to Arduino. Code can serve as a good starting point for more complex projects.

Arduino captures network IP and publishes to DynDNS

Arduino captures network IP and publishes to DynDNS:

Boris have sent us his new project. It is so called Arduino DDNS. This device captures the IP address of your network and it publish on site DynDNS.com. All without PC.

It allow a remote access to your LAN even if the IP address of the connections changes. If you don’t want to use the software provided by DynDNS, and then leave the PC switched on continuously, the solution is this project.

Device queries the site http://checkip.dyndns.com/ to know the IP currently used for the connection, and then publish your free account to www.dyndns.com instead of the computer acquired the new IP.

Such a device therefore allows to locate a LAN connected to the Internet via a router or modem network.

Arduino talking to PHP on Ubuntu

Arduino talking to PHP on Ubuntu:

The whole trick of this is to make PHP send and receive data via serial interface. By using php_serial.class.php it is possible and pretty easy to do.

By following this simple guide you’ll be able to control Arduino via web interface by using simple serial connection. Also PHP is able to collect data from Arduino and then display it, graph it or even store in MySQL database. Think of projects that you can make with this ability…

Making Arduino wireless

Making Arduino wireless:

Probably you already have few cheap RF transmitter and receiver modules around. If not you can grab them at Sparkfun for really cheap. So one thing is great they are cheap, but these are only one way 315MHz modules, so signal can be transmitted one way – ideal solution for some kind monitoring like weather stations and so on. These modules are capable to transmit data at up to 2400bps rate to a max of 500 feet distance.

So here it is a simple set up of two Arduino boards – one with receiver and another with transmitter module. As these modules don’t include any transmitting protocol, it has to be programmed within microcontroller. Transmitting protocol basically consists of two byte starter packet with helps to prevent random noise, then follows address byte that allows addressing multiple transmitters, 2 bytes of data, and last portion is a check sum – to make sure packet isn’t broken. So this is a quick example for your next project if you decide to use these modules.

Fully featured Arduino Web Server

Fully featured Arduino Web Server:

Probably you have tried to do simple HTTP routines with Arduino and Ethernet Shield. But problem is that all has to done manually in Arduino language. It is better to upload html pages in the way as they used to be. So here is a nice tutorial and software where you will be able to run TinyWebServer on Arduino Duemilanove. Along Arduino and Ethernet shield you will also need Adafruit Data Logging shield for storage support. This way all pages and images can be conveniently stored or uploaded via HTTP server to SC card.

You will need to do small modifications to hardware in order to run things smoothly. With such server you will be able to lift Arduino projects to next level.

Send Arduino data to Matlab

Send Arduino data to Matlab:

Probably you know that Matlab is a great tool for data processing, simulation and other engineering programming. So why not use it in embedded application like Arduino.

Here you can find simple and fast asynchronous Arduino to Matlab communication sources. It can be handy for fast sensor data displaying in convenient graph and even do some analysis.

Pierre Claude Boiste

Pierre Claude Boiste: "Το να κουβεντιάζεις με ανόητους, είναι σαν ν’ ανάβεις δάδα για τους τυφλούς.

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