Network Interface

1. Bluetooth (Bluetooth Low Energy) Interface: Before the network allocation the device will turn on the Bluetooth function by default, and its main function is used for proximity device search and initial connection. When you are ready to network the device, tablet and PC can quickly discover the device via Bluetooth and establish a preliminary commumication link to prepare for the subsequent Wi.-fi networking process.

2. WiFi interface: Before the network allocation, the Wi-Fi function remains unconnected by default. The device’s Wi-Fi network can be configured or allocated via Bluetooth LE or USB. If the device has already been configured with network information, it will continuously listen for surrounding Wi-Fi signals and automatically reconnect to the preconfigured router to maintain communication.

3. USB interface: Tablet and PC can connect directly to the device using a USB cable to perform processing operations without relying on whether the device has completed network configuration. The USB connection is mapped as a virtual network card for service use, enabling direct data communication. In addition, the USB interface can also be used to configure the device’s network through a WebSocket-TLS channel.

4. Ethernet interface：Some devices provide an RJ45 Ethernet interface. By simply connecting the device to a router using a standard Ethernet cable, the device can establish a stable network connection. With this setup, tablets and PCs within the local area network can directly access and operate the device, ensuring more reliable network communication.

Service

1. Device broadcasting service: The device continuously broadcasts its own information via Bluetooth, including device name, device type, unique identifier, and an encrypted random factor. The broadcast information can be received by nearby tablets and PCs, allowing users to quickly identify the device and perform network configuration conveniently.

2. Discovery service: After the device is successfully connected to a router, it actively listens on 2000/5353 for UDP broadcast discovery messages within the local area network (LAN) and responds with its device name, device type, unique identifier, and IP address. This enables tablets and PCs in the LAN to quickly discover the device and establish a network connection efficiently.

3. Networking service: Whether connected via LAN (Wi-Fi or Ethernet) or directly through USB, the device continuously listens on 28900 a WebSocket-TLS port to enable secure connections from tablets and PCs. It performs identity verification and authentication for each connecting client, ensuring that only authenticated connections can perform service interactions. In addition, the device provides multi-connection maintenance to support simultaneous real-time status monitoring and control by multiple tablets and PCs.