Is it possible to get the alarm to be triggered when the camera detects movement?
Good question, @Unaas! With the Alarm Feature Update: Linked Devices Camera Siren your Camera siren can be linked to sound when the Alarm is triggered. Motion does not set off a Camera siren, but you can answer a motion event and trigger the siren from the Quick Controls Feature. I hope this helps!
But i can by a extra motion detector and mount it under the camera? Feels unnecessary, but I guess it will work?
That sounds like a great idea! Do keep in mind that the Alarm Motion Detector is intended for indoor use only. The Alarm Motion Detector and your Camera will also have differing fields of view, installation requirements, and settings. Considering these factors will help you with mounting each. Feel free to let us know how this goes!
So, you cannot trigger the siren in your Ring base alarm system by motion detected by your e.g. Ring indoor cam?