Updates: 2018-03-02: Making link to separate article on installing firmware easier to notice. 2018-07-28: Travis Poppe has a 3-D printed case for this you can download and print: https://www.thingiverse.com/thing:2923619 2020-05-01: Reformatting for current WordPress. Renaming some images. This is a fairly detailed guide to configuring a cheap ESP8266 WiFI module to act as a WiFi … Continue reading Wire up your own RS-232 WiFi modem for under $10 using ESP8266 and Zimodem firmware.