@Kolban there's some code in network.c that will properly format the Mac address into a string. Check out how WIZnet does it
networkPutAddressAsString(data, "mac", &gWIZNETINFO.mac[0], 6, 16, ':');
@Gordon started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Kolban there's some code in network.c that will properly format the Mac address into a string. Check out how WIZnet does it