Sense for an active DEP Target is not supported. The device only
        supports passive activation via sense_tta/sense_ttf.

def sense_dep(self, target):
        """Sense for an active DEP Target is not supported. The device only
        supports passive activation via sense_tta/sense_ttf.

        """
        message = "{device} does not support sense for active DEP Target"
        raise nfc.clf.UnsupportedTargetError(message.format(device=self))