ArrBee is an open IoT connectivity platform that helps users easily build and use their own IoT networks. It mainly includes a set of standard or proprietary communication protocol systems and platforms. Its characteristics are short distance, high density, low power consumption, suitable for various complex environmental application scenarios (industrial, agricultural, medical, retail, office), supporting multiple data concurrency, high security, high reliability, and easy access features. In terms of specific services, standard development boards, standard localized deployment SDKs, standard secondary development APIs, and other supporting software and hardware DEMO components can be provided. Users can deploy and manage them for free or at low cost, greatly simplifying the process of connecting and deploying LOT devices.