@Wayne-TP Nop, it does not pair with HUB. Thats becasue its not in pairing mode. LED should be blinking and not just stay on. Never mind, I already sent it back on guarantee. But thanks for reply.

I just bought T310 sensor. And from the start it doesn't go into pairing mode. It doesnt matter if I remove battery or try to reset it, the effect is the same, LED is permanently on for 5 sec then...