The development of CoAP began with the recognition of the unsuitability of the HTTP protocol on resource-constrained devices. The HTTP protocol is the most commonly used application layer protocol on the Internet, but there are challenges in its use on IoT devices

CAN bus was developed by BOSCH, a German company famous for R&D and production of automotive electronic products, and eventually became an international standard (ISO11519). It is one of the most widely used field buses in the world. The CAN bus is a multi-master bus system.

Crystal oscillator is an important electronic component, which is widely used in various electronic devices.

Over the years, ZigBee has been continuously updated and iterated. After ZigBee re-approved its ZigBee (07) specification, it defined two function sets of ZigBee and ZigBee Pro on the basis of its ZigBee (06), and the functions of ZigBee (07) in terms of network environment compatibility are based on this function set got strengthened.

The Serial Port, Parallel Port, and Universal Serial Bus (USB) represent distinct generations of computer interfaces, each with unique characteristics.

Common Mode Interference is a common type of interference in electronic circuits and communication systems. It corresponds to another type of interference called Differential Mode Interference.

In recent days, the physics community has witnessed the emergence of a study on room-temperature superconductivity. This research comes from a team in South Korea, who uploaded two papers on arXiv, claiming that they have synthesized a room-temperature superconducting material at atmospheric pressure, with its superconducting critical temperature exceeding the boiling point of water, reaching a maximum of 127 degrees Celsius.

​Artificial intelligence and machine learning can usually be used for use, but artificial intelligence is more broad. Artificial intelligence consists of more technologies. Machine learning is a branch of artificial intelligence.

Wireless mesh network (WMN) appeared in the mid -1990s, and began to attract people's attention after 2000.Bluetooth technology is a wireless communication technology that supports device in short -range communication