Not completely related to this topic, but I wanted more options than the regular z-wave door chime/ siren offers so I build my own device for half the price using a raspberry zero.
It is definetly more work, but IMHO it was worth it (it plays any mp3, prerecorded/generated notification). Here are the instructions in case someone wants a weekend project.
Discussions about RaZberry - Z-Wave board for Raspberry computer
Hi Björn, thanks for this additional information. I had to exclude my siren and went crazy as nothing worked.
Then I realized that last inclusion was unsecure, new inclusion was secure. Change to "SendDataSecure" and Yiepiyaee.