Heiman zwave plus smoke detector (solved)

I installed the Heiman App and tried to add the device.
Pushed the microswitch 3x with a paperclip and added the device.
But I cannot find the device in the list of all the devices that are connected :fearful:

In doubt if I did anything wrong I tried it again, but receive the message “Status already added”.

Removed all Zwave devices via developer and connected it again.
Still no visible Smoke detector in de devicelist.
Tried adding again, this time with the detector close to homey. But still the same message “Status already added”

What am I missing? Since I cannot find the device…

Never mind.
After 6 attempts it suddenly showed up in de devicelist!