Abstract

This is a report from a project carried out at the Lund Institute of Technology in Sweden during the spring of 2005. The objective of the project is to design a standard (named WIFS) for measuring, transmitting and displaying a variety of weather-parameters such as temperatures, air pressure and wind strength and to illustrate it by designing a couple of units using it.

The standard’s basic thought is to locate all of the expensive intelligence inside a main central unit into wich up to eight sensors may be plugged in. The central unit do all of the AD-conversion, signal processing and data packaging needed to wirelessly broadcast the information to any number of more or less advanced recievers. Each reciever may display (or log) one or more of the parameters (chosen by the reciever designer).

To illustrate the standard two sensors, one central unit and one display unit is constructed. The central, and display units are based on the Atmel AVRMega16 microprocessor (programmed with the AVR-gcc C-compiler). The different parts of the project are described and explained in general and all source code, functions etc. can be found as appendix.

The report is entirely in Swedish.