This talk will focus on the embedded development of our 801.11g wireless sensor node called the Fluksometer. Fluksometer development went through several iterations. It evolved from a hacked-up Arduino - WRT54G prototype, via an Arduino Wee - Fonera in alpha to the custom sensor board - Abocom WAP2102 which we are now using in our beta trial.

This hybrid approach, connecting a custom sensor board to an off-the-shelf wifi router via UART, allowed us to develop a generic sensing platform that can be used for monitoring almost any physical unit, provided a suitable sensor can be found. We currently focus on measuring household electricity consumption and, in the near-future, photo-voltaic production. We will present our sensor node's hardware (AVR and Atheros AR1217) and software (based on AVR-libc and OpenWRT 8.09) architecture and discuss its (dis)advantages and a lessons learned.