A wireless network of EIS devices [sensor networks]

By using a sensor connected to a generic wireless embedded Internet system (EIS) platform, data can be presented on-line over the Internet using a standard WWW-browser. When started, the EIS device automatically searches and connects to other devices providing Internet connectivity. The EIS can also provide Internet access for other devices, for example other EIS platforms, thus creating a local network. In this paper we focus on mobile phones with GPRS as the means for wireless Internet connectivity as it provides enhanced area coverage in today´s networks. To overcome the problem of non-public IP addresses, a basic server based solution is developed. Our experiments confirm that within GPRS coverage, the EIS device successfully provides Internet access and presents data for on-line monitoring over the Internet.