The paired/unpaired status of any nearby Casambi enabled device can be seen in the app from the 'Nearby devices' screen. This screen shows a list of all Casambi enabled devices that are powered on and are close to the mobile device (i.e. Within Bluetooth signal range).
Paired
A Casambi enabled device is already a part of an existing Casambi wireless network. If a device is in a "paired" state it means that it has been added to a network. If you want to add an already paired device to a different network then it first needs to be unpaired from the network it is currently part of.
Unpaired
A Casambi enabled device in not part of a Casambi network. It must be added to a network in order for it to be controlled/programmed. When a Casambi enabled device shows as unpaired it means that it has not been added to a Casambi network and cannot be controlled with Casambi app. When powering a Casambi enabled device for the first time it will appear as unpaired in the app.
See also:
"How do I pair a Casambi enabled device?": http://support.casambi.com/support/solutions/articles/12000016704-how-do-i-pair-a-casambi-enabled-device-
"How do I unpair a Casambi enabled device?": http://support.casambi.com/support/solutions/articles/12000016709-how-do-i-unpair-a-casambi-enabled-device-
Related articles:
Troubleshooting: PAIRED devices
Unpairing a "Paired" device / Cannot add a device to my network