OK, finally its working.
Support answered really quick with standard answer (they described every single step the app force me to follow). Anyway, to describe my problem step by step, i tried it again and it just works. My guess is, they changed something in the backend or whitelisted the device s/n. For example, the site i.ezvizlife.com no longer works as of today without plugin, yesterday it did.
I attach the working (left) / not working (right) power-units:
I already flashed Hikvision FW and now I'm testing with a simple 12V DC Relais (chime-mode: classical). Its working now for 3 hours and I am confident that it will continue to work.
Support answered really quick with standard answer (they described every single step the app force me to follow). Anyway, to describe my problem step by step, i tried it again and it just works. My guess is, they changed something in the backend or whitelisted the device s/n. For example, the site i.ezvizlife.com no longer works as of today without plugin, yesterday it did.
I attach the working (left) / not working (right) power-units:
I already flashed Hikvision FW and now I'm testing with a simple 12V DC Relais (chime-mode: classical). Its working now for 3 hours and I am confident that it will continue to work.