M2M

Or Machine to Machine, refers to direct communication between devices using any communications channel, including wired and wireless. In modern times the communication is often via the Internet of Things (IoT).Widespread adoption of Internet Protocol Version 6 (IPv6), with its extremely large address space, is necessary to accommodate all of the sensors and machine-readable identifiers that Internet of Things will require. M2M communication can include industrial instrumentation, enabling a sensor or meter to communicate the data it records (such as temperature, inventory level, etc.) to application software that can use it (for example, adjusting an industrial process based on temperature or placing orders to replenish inventory).