Hi Gormd,
It was a little bit weird, but it works for me now. I have just to disconnect the board and connect it again. If I left it connected through the USB, even if I push the reset button, it doesn't work - no wake up. But if I disconnect the board and I connect it again, it works. Both with sleep() and deepSleep(). It seems I need just a switch off.
I've been measuring with both sleep() and deepSleep(), without SigFox initialization, and I measure 350 uA in sleep() and deepSleep() modes. No differences between them.
I'm using MKRFOX1200 for an agriculture application. I've been testing Pycom SiPy + PySense with quite good results, but I would like also to test this board.
I'm going to test removing the pin initialization from wiring.c.