Product Description: T-Internet-POE ESP32 LAN8720A Chip Ethernet Adapter Expansion Board Comprehensive Certification and High-Speed Protocols: This Ethernet adapter expansion board is equipped with the ESP32 chip, meeting a wide range of international standards including FCC, CE-RED, IC, TELEC, KCC, SRRC, and NCC. It supports 802.11 b/g/n protocols, with 802.11n offering speeds up to 150Mbps. The board also features A-MPDU and A-MSDU polymerization, with a 0.4μS protection interval for enhanced performance. Robust Frequency and Communication Range: Operating within a frequency range of 2.4GHz to 2.5GHz (2400M-2483.5M), this adapter provides a powerful transmit power of 22dBm. It ensures a reliable communication distance of approximately 300 meters (384.3 feet), making it ideal for extensive networking applications. Advanced Bluetooth Capabilities: The board supports Bluetooth V4.2 BR/EDR and BLE standards, featuring a radio frequency with -97dBm sensitivity NZIF receiver. It includes Class-1, Class-2, and Class-3 emitters with AFH, and supports audio frequencies such as CVSD and SBC, ensuring versatile connectivity options. Versatile Wi-Fi Modes and Security: This adapter supports multiple Wi-Fi modes including Station, SoftAP, SoftAP+Station, and P2P. It incorporates robust security mechanisms like WPA, WPA2, WPA2-Enterprise, and WPS, with encryption types including AES, RSA, ECC, and SHA. Firmware upgrades are facilitated through UART download or OTA, allowing updates via network or host. Extensive Software Development Support: The board is designed to support cloud server development and offers an SDK for user firmware development. It is compatible with a wide range of networking protocols such as IPv4, IPv6, SSL, TCP/UDP, HTTP, FTP, and MQTT. User configuration is streamlined with the AT+ instruction set, cloud server access, and compatibility with Android/iOS apps, OS X, and FreeRTOS. This Ethernet adapter expansion board is a versatile and powerful tool for developers and tech enthusiasts, offering extensive connectivity, robust security, and comprehensive development support. Whether you're building a complex network or developing innovative applications, this board provides the flexibility and performance you need.