ESP8266 ESP-01 Serial WiFi Wireless Transceiver Wireless Module

ESP8266 has powerful on-board processing and storage capabilities
Support 3 modes: AP, STA, AP + STA

Add wifi to your Prusa Mini. Latest firmware supports it.

Specifications:
Serial/UART baud rate: 115200 bps
Input power: 3.3V
I/O voltage tolerance: 3.6V Max
Flash Memory Size: 1MB (8Mbit)
WiFi security modes: WPA, WPA2

(Thanks Roger!)