The paper is devoted to the application of neural network based SANARX method, implemented on embedded device, for the real-time control of liquid level inside a single water tank. The system is implemented as laboratory prototype with two bottles. The embedded neurocontroller is implemented in Arduino Mega 2560 Developing Board, which has been chosen due to sufficient computational power. Presented microcontroller program is an adaptation of mathematical model designed and verified in MATLAB/Simulink environment.