D25 is a pointer type meter head, which can measure pressure with an accuracy of 1%. It also has a serial transmission function. After adding the core of the Internet of Things developed by the company internally, the original functions can be extended to connect to the cloud or local network. Support Websocket and MQTTS communication protocol. The operation commands are collected in JSON format, with multiple built-in functions and options such as attribute access, permission management, event generation, and behavior scripts. System integration developers can directly obtain measurement data from many Internet of Things devices through the network platform, and set the header behavior script according to the system function requirements to easily complete the project. In addition to WiFi, other wireless network options such as NBIoT can be provided in the short term.