I must be doing something very wrong, because nothing seems to be working. Firmware version is 0114-beta (debug). I've tried 8 different cards (hotel rooms, ski resorts, oyster card, contactless bank cards). I've tried autotag, but none of them says anything. I've also iterated manually setting the tag type and selecting: no luck. I've tried plotting with different types as well but all I see the graph below, same for all cards and all tag types.
I can only think that I'm connecting the coil wrong, but can't see any mystery to it.
Is this familiar to anyone? Any hints would be appreciated, not sure what else I can try at this point.