The Arduino system offers an easy and open-source method for programming microcontrollers. Normally this means using a serial cable or USB cable attached directly to the microcontroller project. But what if your project is floating in a weather balloon, glued to the bottom of a swimming pool or baked into a loaf of bread? It would be great to upload code changes wirelessly, and even greater if you could do it from several kilometers away.
The following example demonstrates how to build a complete wireless solution for uploading code to a remote Arduino microcontroller using a couple of XBee radios, and a handy function for accomplishing wireless resets.
Arduino Wirelessly Programming System Based on XBee: [Link]
This simple circuit is designed to report the temperature via any standard FM broadcast band radio at regular intervals. It uses a simple low bit rate tone signalling scheme which can be interpreted easily by both humans and machines. Such a device can be used stand-alone or as part of a PC-based weather station or HVAC system.
There are endless practical applications for such a device, just think about how many time you wanted to measure a temperature and for that you needed to run wires to the sensor. Now with this circuit you can place the device where you need the temperature reading and no more wires need to be connected.
Wireless Digital Thermometer: [Link]
The circuit contains 2x TRW-24G modules, 1x AT90S2313 microcontroller and 1x MAX202 TTL to RS232 voltage level converter. When you power-on this circuit, the AVR it will configure the IC1 as receiver and IC3 as transmitter. I’m not gonna give you any more technical specifications because they are well documented on the authors page. I say you give it a try when you need to setup a wifi connections between AVR’s.
Experimenting Wireless Comunications With AVR ATtiny2313: [Link]
The entire system consists of three main function blocks: The AVR as the central CPU running the high level network routines including the TCP/IP stack. The second main block is the compact flash WLAN card running all the low level network functions including encryption. The third block is a XC9572XL CPLD, a programmable logic device that forms the spi2cf interface between the AVRs SPI and the CF card. It is mainly doing the translation between the SPI interface used to connect to the AVR and the parallel interface used on the compact flash slot.
Wlan for AVR: [Link]
WIMP is a project developed by 5 students as the 4th year project and supervised by Professor Trevor W. Pearce of the Department of Systems and Computer Engineering at Carleton University. But, what the heck is WIMP ? As the title says its a wireless interactive media player, basically a MP3 stereo system with a wireless link to a PC. Currently the students are still working on the project, but I can see some serious applications, for this system in the future, so good luck guys in finishing the project and scoring nice grades.
Wireless Interactive Media Player (WIMP): [Link]
