As usual I’ll be using a NodeMCU board (I really did order a lot of them) which uses an ESP8266, but there’s no reason this would be difficult to achieve on an Arduino-based device.

If you can send an ESP8266 ... into the Arduino-for-ESP, where it’s just been worked into the latest release a few hours ago. Time for an update. But those crusty old NodeMCU builds that we ...