"Low-power wireless communications" refers to a class of wireless communication technologies and protocols designed to consume as little power as possible while transmitting data. These communication technologies focus on providing low power consumption, long life and An energy-efficient solution suitable for many application scenarios, especially those devices and systems that have strict requirements on battery life and energy efficiency.

The Internet of Things refers to the connection of various devices and objects through the Internet so that they can communicate with each other and exchange data. With the continuous advancement of atechnology and the continuous expansion of applications, the Internet of Things has played an important role in realizing device interconnection, data sharing and intelligent applications.

​The wireless module transmits data wirelessly, which is easier to maintain than wired communication. The module will go through multiple processes during the production process.

SAE J1939 (hereinafter referred to as J1939) is the recommended standard of the American Society of Automotive Engineers (SAE). digital communication between electronic components.

A radio frequency connector is a radio frequency coaxial connector, which is usually regarded as a component attached to a cable or installed on an instrument as a component for electrical connection or separation of transmission lines.

Auto-ACK and ReSend are long-talked-about issues in our wireless communication. After the data is radiated into the air through the modulation circuit, how to judge whether the other party has received the data? If not received, what mechanism will be used to handle this exception?

At present, most researches focus on how to integrate the information obtained by multiple LoRaWAN gateways to improve network scalability and decoding rate, and less research on the gateway itself. How to optimize the layout of one or more gateways so that each gateway can play the most role in a specific application is also an issue that needs to be discussed.

The inductive sensor is a device that uses the law of electromagnetic induction to realize non-electrical measurement through the change of the self-inductance and mutual inductance of the coil. It is characterized by the use of the physical characteristics of the inductance, which can measure displacement, vibration, pressure, flow and other signals without direct contact with the measured object.

​ Entering 2022, IoT technology is becoming more and more popular in all walks of life. LPWAN technology (low-power wide area network, long-distance IoT wireless communication technology) relies on wide signal coverage, small occupied bandwidth, large number of terminal connections, and low power consumption. , low cost and other advantages, to win a high penetration rate in the global market.