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In this article, we consider a system for wireless data transmission via visible light. An experimental stand for temperature control is presented. Transmitting and receiving devices have been developed to organize traffic. A digital temperature sensor is connected to the transmitter. The transmitting device has a white light-emitting diode (LED) with a power of 3W, which performs the function of lighting and additionally transmits temperature data. A silicon photodetector is used to receive the signal. Data is controlled and processed by Atmega 328 microcontrollers, which are located in both devices. The signal is encoded using the Universal Asynchronous Receiver-Transmitter (UART) protocol. Experimental results of the system operation are presented, which show stable data transmission over a long period of time.

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