In order to remain competitive in the long term and push the efficiency of the company to its limits, entrepreneurs are increasingly open to the idea of implementing Industry 4.0 in SMEs to envision a connected SME4.0. As the biggest challenge encountered is to get started, this article aims to make it easier for SME entrepreneurs to decide on the implementation of new technologies, mentioning the latest technological trends, the advantages of being SME4.0 and specifically process 4.0, listing the last major barriers that hinder the implementation of Industry 4.0, and which mainly reside in the lack of skills of employees on new technologies and predictive maintenance, high costs of setting up new technologies and long process of return on investment.