I have a fritz!box 7490 (latest OS 06.83) and a tp-link HS100 smart plug (lastest firmware 1.1.3) The installation works fine

 

and via the KASA app I can see and control the plug both locally and remotely.

 

The signal strength is fine - have the plug close to the router.

 

However, within 24 hours the KASA app is unable to 'reach' the smart plug.

 

The plug's status light shows it is connected and the fritz!box still has the connection.

 

The plug is fine - connected it to pbtech network over weekend and never lost access to it.

 

tp-link support having problems resolving the problem.

 

Does anyone have one of these smart plugs working from a fritz!box and is there some

 

special configuration required to getting to to work and not becoming 'unreachable'?