UPDATE: PC World swapped the kit out for another one and it now works perfectly.
Had a pretty bad experience with ST today. Excitedly went to PC World (UK) and picked up the kit.
Took it home and connected the hub to my phone - no issues. Presence sensor & outlet connected very easily too.
Then neither the Multi-Sensor or the Motion Sensor would connect. I opened both up and tried to hit the small button whilst re-inserting the batteries, but the LED wouldn’t light up. I managed to get the LED on the Multi-Sensor to come on by putting the battery at a diagonal angle. I got it to pair, it worked for about 30 seconds then I never managed to get the LED to come back on. I tried pulling the plastic clips in tighter and pushing down on the battery to try and make the contact touch the battery, but no luck (with either sensors). I then attempted to (very lightly) pry the battery contact up 1-2mm on the Multi-Sensor so it would touch the battery and it snapped right off! I didn’t really understand what this advice on the ST website meant:
“Try removing the batteries and then firmly pinching together the ends of the clamps until they snap back into place”
At this point I decided to give up. It definitely comes down to the sensors not being able to take power from the batteries on both sensors. Strange that it happened on 2 sensors in 1 set, and I can’t find anyone else having this issue online. When the Multi-Sensor paired for about 30 secs it showed the battery having full power.
Will be taking the kit back to PC World in the morning and will hopefully get a full refund. Unsure if I should just swap this for another kit from and hope it works? I still really want to try SmartThings!