With the developments of information and communication technologies, it is possible to connect to computing environments irrespective of time and place, which are called the ubiquitous computing environments. The mobile phones are playing an important role in this ubiquitous era, and the spread of mobile phones has increased the interest of in the wireless contents.
In this thesis, we designed and implemented a mobile underwater searching system which can be considered as a wireless contents.
An underwater searching system is a device which uses sonar to detect underwater objects: it radiates sonar wave, receives the echo signal and processes the received signal to display on the user interface.
The mobile underwater searching system, which can be seen as ssimplified, low cost version of common underwater searching system,consists of transducer, RF transmitter module, main controller, RF antenna, RF receiver module and mobile displayer. Among these, the last two components, namely RF receiver module and mobile displayer are mainly software components, and their design and implementation are the topics considered in this thesis. The RF receiver module gather data sent from remote sonar device and transmits them to the mobile phone upon request. Mobile displayer,which resides on the mobile phone, receives data from RF receiver module and displays them on the user interface.
The development environment consists of WIPI platform and Jlet based on Java programming language.