Design of a radio communication interface for digital controllable luminaries

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Kovács Zoltán György
Department of Electron Devices

According to the announcement of the thesis the target was design and implementation a system with radio frequency interface, which can be controlled intelligent light sources. The system therefore contains one control unit and more receiver units. The system controller commands may be issued via PC. The effective control is realized with microcontrollers. I have modeled the intelligent light sources of the receiver unit with LEDs.

During the search of the specialist literature I get acquainted with the control options of the LEDs, furthermore I reviewed two popular RF protocolls (Zigbee, IQRF). I made a search about the microcontroller-families, which you can find on the market, analyse the more important communications protecting by them. (UART, SPI, I2C), and also their else abilities.

After I got acquainted the specialist literature of the subject I put paid to the specification, then I created a system plan, I made the choosing of the components and the schematic. I implemented the schematic as a „board-model” and I wrote software to each units. I implemented the interface on the PC side in language C#. I defined the protocols between the several modules (SPI, UART), and implemented softwarely and also designed the program of the IQRF modules, which are able to be programmed and implemented it on language C.

I created on the control side an USB-RF adapter, while on the receiver unit I made a RF-lampcontroller adapter. For the demonstration the receiver unit controls a RGB LED, and make able to query temperature. The demonstrated composition certifies that between each lamp units a two-way contact can be achieved, with this provides the digital control and the querity of the parameters (temperature).

During my work I created a possible composition, which achieves the vision of the intelligent light sources. I certified with measurements that the result suggested by myself is functional, however several parts are waiting for development.


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