@Alexander_Wardeh
I followed his instructions here:
From the app start "Add a thing"
Press and hold the button on the temp sensor until you get 3 flashes
When complete make sure that when you press the button the device give you two flashes on the LED, if not repeat step 2 until that happens.
Using the IDE look at the logs, not the live logging but the hub log (select hub, then select events)
Look for a catchall event at the same time as you pressed and held the button. You will see something like this:
catchall: 0104 0000 01 01 0100 00 B46D 00 04 115F 0A 01 01FF4231641000032814983900000000953900000000
Make a note of the device ID, in the case above it’s B46D (7th set of chars from the left)
Return to the IDE and manually add a device.
Enter the details and when asked select "Temperature Sensor and make sure you set the Zigbee and network id to the same value you found in step 6.