I was experimenting with TimeCheckReq on TTN but some first trials seem to indicate that TTN does not answer (at all) when this MAC command is sent. Does TTN support this? I have read earlier forum posts that it was supposed to be part of V3(?)
May well do, but at present we are on V2.
And it won’t get added, all new features are going in to V3.
Aha, my bad, I thought (there you go: assumptions 
) that V3 was already rolled out. Thanks!