The CM4 Sensing series is designed for industrial applications such as data acquisition systems, smart manufacturing, smart agriculture, and the Internet of Things (IoT). In harsh working conditions such as high and low temperatures in industrial applications, the design of CM4 Sensing makes it highly reliable. CM4 Sensing is equipped with many typical industrial application interfaces, such as RS485 interface, RS232 interface, and CAN interface. The RS485 interface is a very common and popular interface on the industrial bus. For example, the connection of the sensor and the communication with the PLC are all realized through the RS485 interface. The RS232 interface is another common industrial communication interface. In the agriculture field, CM4 Sensing uses the RS485 interface to connect with various sensors on-site to monitor temperature, light, and humidity, and to provide temperature log, humidity, and humidity adjustment in time to ensure the rapid growth of crops and increase production capacity. For the IoT application field, CM4 Sensing is equipped with Raspberry Pi OS as the Linux system. Many application codes with the cloud are open source, which makes it easy for users to build a cloud network when CM4 Sensing is used as an edge computing gateway. At the same time, CM4 Sensing can provide 4G function, allowing users to use wireless networks to connect to the cloud instead of a wired network.