“Oui OUI (Yes OUI) on an ESP8266 with the entire Organizationally Unique Identifier database stored in SPIFFS - spiffy, ugh? If you would like to know more about the OUI, check out Wikipedia. This is a proof-of-concept only and other than demonstrating the ability to “very quickly” look-up the owner of a particular OUI (outlets 1, 2, and 3 of the MAC address) there is little social value in the sketch code. I used a stock NodeMCU with 4MB of flash. I used ArduinoIDE 1.6.8 under Linux Mint 17.3 and the IDE was configured for 1MB code space and 3MB SPIFFS.”