Cheap compatible beacon

Hardware Home Automation
1

Hi, i want to make a rule that activate a night mode when I’m in my bed…

So I look at mysensor to make a DIY one but then I realize that I don’t want to nigh mode to activate if my girlfriend is in my bed in me in the office. SO …

…I think about beacon. When me and my girlfriend both of our iPhone are in the room plugged. !

So I’m looking for beacon to put in my room that is compatible with openhanded and who’s gonna send command to openhab only if I’m in my bedroom

2

If it is an Android phone look at FIND.

Beyond that I know of no beacon or other wireless way that will be accurate enough to pinpoint you down to a specific room.