“…For example, following this line, some research works have investigated the use of low-energy devices in order to display information in different scenarios such as supermarkets, production systems, or hospitals [9,10]. e basic idea is to employ new, open, and more efficient technologies such as the electronic ink in order to improve the current automatic industrial systems based on proprietary technologies [11,12], programmable logic controller (PLC) [13,14], and very lowlevel protocols such as OPC (Object Linking and Embedding for Process Control) [15].…”