You’re right, it’s better to use the Synology for that. Offcourse we just all want to know how to access the sensor on the HikVision doorbell. No luck there.
I tried ‘curl -i --digest -u [USER]:[PASSWRD] http://[IP-ADDRESS]/ISAPI/Event/triggers/vmd-1/notifications/preset/VMD’ But did not work. Then I started to modify the URL to test. But still no success.
For the Synology, I still have to start on the sensor in HASS. I hope to get to that part this week. If you manage to get it to work, please post it here. When I get it to work, I’ll post it here.