The Internet of Things (IoT) vision is becoming a reality and we are already its application in the most various fields, such as smart cities, smart homes, and several others. IoT technologies are a key enabler for the next industrial revolution, which is referred to as Industry 4.0. The aim is to interconnect and computerize traditional industries, such as manufacturing, leading to several benefits such as improved efficiency, cost reduction, and novel business models. Despite the good potential, several issues are holding back the progress of the Industrial IoT. The ever-increasing number of devices has led to a huge fragmentation, with a plethora of vendors and protocols and companies often developing their own proprietary solutions for their business needs.