This dissertation is about the development of a demonstrator for wireless data transmission of analog sensor data by applying two different possible ways of transmitting data. In the first case, the measuring data is sent directly to the PC for analysis. In the second case, a second recipient allows the direct output of the data in analog form.

By using a transmitter and a receiver, we can achieve that five sensor signals are transmitted at the same time. In the course of the project, we decided to construct two different receivers. In case of the first receiver, the Bluetooth module was directly connected to the PC and as a result, the sent data was displayed on the PC monitor as analog signals by means of the LabView graphic programming language by National Instruments. By request of Kistler Instrumente AG, we constructed a second receiver which outputs one of the five signals directly in an analog form next to a BNC power outlet.

The Bluetooth specification 1.1 allows a data rate of max. 723,2 kBit/s. Based on the bandwidth of the measuring data that is to be transferred, and the possibilities that Bluetooth offers, we set a maximum data rate of 562 kBit/s for this project. It was not until the exact measuring and analyzing data was available that the actual possibilities of the Bluetooth technology were apparent. In order to be able to reach the set data rates in the specifications, we had to develop a separate host controller interface (HCI), including arising license expenses. The serial port profile (SPP) used by us allows a maximum synchronous data rate of 128 kBit/s.

Despite the restriction of the data rate, we continued working on the development of the demonstrator. We developed a product which shows the actual possibilities of Bluetooth and in addition, helps deciding on the future development of demonstrators. In the forecast section of this dissertation, we have shown various possible ways to accelerate the data rates.