Note: Modbus is not supported. Key features - Working modes: TCP Server, TCP Client, UDP Server, UDP Client, HTTPD Client (GET and POST). Fully configurable via webpage, AT commands, serial protocol, and network protocol. Includes a configuration protocol that can be integrated into your own software. - Reliability and maintenance: KeepAlive mechanism detects broken connections and auto-reconnects. Firmware can be upgraded over the network. Factory reset available via software and/or hardware. - Customization and device identity: Supports customized heartbeat packets to verify the link and actively retrieve sensor data. Supports customized registration packets; after connection is established, the registered packet is sent as the identifier to distinguish different devices. - Web and protocol compatibility: Supports a customized webpage for configuring the module. Includes RFC2217-like protocol to communicate with devices whose serial settings (baud rate, data bits, etc.) may change. Use scenarios - Industrial sensor networks: deploy as TCP/UDP endpoints to send telemetry to a central server with reliable KeepAlive and easy remote configuration. - IoT gateways with multiple devices: use customized heartbeat and registration packets to identify and manage diverse devices from a single gateway. - Remote device management: perform over-the-network firmware upgrades and remote factory resets, with web-based configuration and versatile connection modes.