It is the goal to develop a versatile, low-cost sensor node platform for experimenting with the Contiki operating system and 6LoWPAN networks similar to the following modules: http://en.wikipedia.org/wiki/Comparison_of_802.15.4_radio_modules

http://freaklabs.org/index.php/Blog/Zigbee/atmel-at86rf230_231-review.html
http://forum.sparkfun.com/viewtopic.php?f=13&t=27907

868 MHz or 2.4 GHz/Chip or PCB antenna:
http://www.mikrocontroller.net/topic/229166

http://katalog.we-online.de/kataloge/eisos/index.php?language=xx&pf=WE-MCA
http://katalog.we-online.de/kataloge/eisos/media/pdf/7488940245.pdf

http://www.atmel.com/Images/doc8095.pdf

Design choices:

• Use a ATMEL MCU with at least 16kbyte RAM
• Use a DIL package for the MCU, so that it can be replaced in case of failure (ATMEGA1284P-PU)

http://www.atmel.com/Images/8059S.pdf

The following list of components could be useful for the operation of the sensor node.

Provides power and lets us debug the output from the operating system and application program. (MAX232 or equivalent).

Use a single AA battery to power the board.

• Temperature sensor: OID zur Temperaturmessung mit einem NTC Widerstand
• Humidity sensor
• Battery Voltage Sensor
• Coulomb-Counting (measuring energy consumption)
• …

• 1 or 2 AA batteries
• Prototyping area

http://mikrocontroller-praxis.de/de/Mikrocontroller/AVR-ATmega.html
http://www.csd-electronics.de/
http://www.air-electronics.de/catalog/product_info.php?products_id=884

Possible new radio-module:
http://www.dresden-elektronik.de/shop/prod132.html

Contiki on this radio-module:
http://people.inf.ethz.ch/mkovatsc/wiki/general:contiki:atmega128rfa1

http://www.nongnu.org/uracoli/hwlist.html
http://www.sax.de/~joerg/