Five functions:?Socket function (Socket working mode is divided into four types: TCP Client, TCP Server,UDP Client, and UDP Server, which can be set by AT commands)?Serial port function?Bluetooth function?Wifi function?Wired network port access function(Development board is connected to the Internet or local area network through a wired network,Socket function can be configured through AT commands, a TCP/UDP connection can be established, and the user's designated server can be accessed). Supports wifi to connect to the Internet or LAN through a router, establish a TCP/UDP connection, access the user's designated server, support wired network access, and support user secondary development.. Supports serial port, wifi, Ethernet, and Bluetooth data ports in pairs. Transparent data transmission Supports firmware upgrade by connecting to the network over a wired network or wifi. Adopts dual-core Xtensa@ 32-bit LX6 MCU. Integrated SPI Flash 32Mbitl/SRAM 52OKB supports TCP Server, TCP Client, UDP Server, UDP ClientT mode. ESP32 series ICs are SOCs that integrate 2.4GHz Wi-Fi and Bluetooth dual-mode, with ultra-high stability, versatility, reliability, and ultra-low power consumption.