A Field Wireless Network for Control and Data Collection
Georgi Georgiev, Doyno Petkov, Hristo Nikolov · 2006
The WLAN is a set of hardware, firmware and software tools that allow to measure and collect certain parameters over relatively large area. By parameters we mean any physical value convertible into electrical counterpart. For instance: air temperature, relative humidity, soil moisture, leaf wetness, wind speed and direction, the water level in a river or a tank, etc. All these values can be converted into an electrical form by means of sensors. If a sensor exists for a certain physical parameter, then it is very likely that it can be adapted to WLAN system. There are certain limitations, though the power consumption of the sensor must be low enough to allow its use with the stations, which are supplied by battery