Can I ask what is wrong with your Netatmo doorbell? I also have one? Ours thankfully still working okay. But worried might die suddenly like indoor camera (below).Just ordered one to replace my existing Netatmo Smart Video Doorbell (which has been a disaster).
We also have indoor Netatmo camera, and it work perfectly for few years then last year September first one suddenly died stopped working, paid small amount get repaired and still not working and they eventually agreed send replacement. Then few weeks ago our 2nd one died exact same way and now Netatmo ignore our emails about it. So very annoying. Need replacement for 2nd camera but hard to find no subscription camera that allow SD card and backup to cloud I want like Dropbox or NAS.