Using dual-core XtensaR 32-bit LX6 MCU. Integrate SPI flash 32Mbitl SRAM 520KB, support TCP Server, TCP Client, UDP Server, UDP Client working mode. Supports four data ports of serial port, wifi, Ethernet and Bluetooth to be combined in pairs, and data is transparently transmitted. Support to connect to through wired network or wifi to upgrade the firmware. Support wifi to connect to the Internet or local area network through a router, establish a TCP/UDP connection, and access the user's designated server. Support wired network access, support user secondary development. Industrial grade working temperature range: -40~+85 Serial port baud rate: 80~5000000 Network protocol: IPv4, TCP/UDP Colour: Black Material: PCB Package Contents: 1 * ESP32 Internet Of Things Module Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.