So @alexdelprete uses Google and he is in Italy with his DB1
New RCA HSDB2A 3MP Doorbell IP Camera
Im getting a bit afraid now buying the ezviz db1 to upgrade to hikvision if you guys start to get faulty devices with upgrade? Is it any point to upgrade to an onvif firmware if the rtsp stream on ezviz is stable? We've upgraded tens of times with different fw. Never bricked it. You're not...ipcamtalk.com
@pete_c uses a relay, you could search for his ELK writeup.
New RCA HSDB2A 3MP Doorbell IP Camera
Same here. 190716 on my LaView, chime works. So, since LaView no longer sells the Halo ONE, and have not done any firmware updates since last year, hmmm just wondering... that might be the case. its very possible that the companies that have updated to latest firmware, will be offering the...ipcamtalk.com
HTH
I was just about to edit my post as I found some info on relays and wiring higher up in the thread. Don't know why I missed it in my first search. Manyt thanks for your help anyway.