Hi Marco,
The latest one I have tried for external doors is this:
Z-Wave Plus Aeotec Door/Window SensorIt is Gen 5 but is backward compatible AFAIK. I am using it in a Gen5 network.
The plus points for me are:
- It runs on two standard AAA batteries
- It is easily detached from its base to replace the batteries and also to access the Include/Exclude/Keep awake button
- Wake up time is up to 10 minutes - which makes syncing with Indigo easy.
I have previously tried Fibaro and Popp door sensors - I like this one the best. It is the best user experience for including/excluding and syning of the ones I have tried.
For internal wooden doors, I use this:
Z-Wave Plus Aeotec Recessed Door SensorThese have been trouble free.