Industry 4.0 is characterized by a new way of organizing the company to end complex hierarchical structures. It is therefore necessary to merge ICT techniques with industrial technologies. In Industry 4.0, embedded systems, IoT technologies and CPS link the virtual space to the physical world to give rise to a new generation of connected factories called "smart". In this paper, we aim to contribute to the digitalization of an industrial case, namely: level detection. We started to retrieve the data from the PLC via Node-RED, then we set up two supervision systems: local and remote via Ubidots and finally we stored all the actions in the MongoDB database. This contribution facilitates the integration of digitalization in the industry, it also ensures in a simple way the transition from a 3.0 factory to a 4.0 factory.