If you’ve got an Arduino, a few passive components, and a SSD1306 OLED, then [mircemk ... for stereo as long as the two displays don’t have conflicting I2C addresses, he decided to simply ...

A lot of people have used ESP8266 to add inexpensive WiFi connectivity to their projects, but [Oscar] decided to take it one step further and program an Arduino over WiFi with the ESP8266.