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A new concept evolved in Industry 4.0: machine-to-machine (M2M) communication, which is becoming an increasingly important technology in the entire domain. M2M refers to the concept where two devices exchange information with each other, such as sending and receiving data. The communication that occurs between devices is autonomous; no human intervention is required for the overall process of exchanging information. The wireless connectivity [13] between interrelated devices automatically exchanges and analyzes data in the cloud. The Internet of Things (IoT) enabled integrating several M2M systems and cloud computing that process all data by using the cloud web platform.

This chapter highlights the distinct types of connectivity used between machines for communication. The most used connectivity [16] is: (i) Radiofrequency identification (RFID), which has a maximum range up to 10 meters that indicate the limitation of this type of connectivity; (ii) Bluetooth and Wireless-Fidelity (Wi-Fi), the most useable and reliable wireless connectivity for communication, with the range limitation from 10-20 meters in the case of Bluetooth and approximately 50 meters in the case of Wi-Fi; and (iii) low-frequency connectivity [15], which has a range of up to 1000 kilometers, such as GSM network and satellite.

In general, the applications and the area of M2M connectivity that can be applied and used widely most probably apply to all domains. Likewise, it is successfully utilized in the artificial intelligence industry [14], allowing devices to communicate with each other and make autonomous decisions. Some established and used crucial industrial M2M applications that enhance the productions in the manufacturing industry are: (i) intelligent stock control, (ii) data collection for processing, (iii) just-in-time implementation, (iv) automated maintenance, and many more.