Within the framework of the project launched together with Kaposvár Sport Fishing Association, 2 S2N Smart Buoys have been placed on Lake Deseda. One of them continuously monitors the water in front of the fish keeper’s house, providing data on the lake’s pH, temperature, dissolved oxygen, conductivity and redox potential parameters throughout the summer. The other buoy has a temporary place on the lake’s sport fishing area, and transmits measurement data for the VI. Feeder Club Team National Championship, held between 08-10 July, 2021. This buoy’s measurement data is available for the competitors via a public QR code.