The Pico-ESP8266 is a WiFi expansion module designed for Pico, which can be controlled via UART AT , and supports TCP/UDP communication protocol. It is an easy solution to enable WiFi feature for Pico, suitable for sorts of IoT communication projects. Standard Pico header, supports Pico series. UART communication, controlled via AT , helps you get started quickly Supports STA, AP, and STA+AP three WiFi operating modes, embedded LWIP protocol stack, supports TCP/UDP communication Based on ESP8266 module, four-layers process, enhanced impedance matching, stronger signal, more stable connection 2x functional buttons, convenient for user to update AT firmware through Pico color: blue Material: PCB Package Contents: 1 x Expansion board 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.