hi Rob,
SNTP is not supported, however, I just added it to the wish list. I think it's a good idea.
Currently I am working on a new function in the Cuety tool that will calibrate the Real-time clock in your CueCore. After this calibration there should be hardly any more drift in the RTC.
I have already finished the calibration algorithm and I am currently testing it on a couple of CueCore. I expect to release this new Cuety version in the next couple of days.
cheers,
Maarten