I have the idea, to use a window sensor on my letter/parcel box to indicate an incoming letter/parcel with a notification. Do you have experience with this kind of automation?
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Hi @SuperUke ! That automation can work - depends on the kind of letter box of course! But check out the new P100 multi state sensor! This new sensor is definitely the better choice- it will be released soon
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I’ve been using the Aqara Door and Window Sensor T1 on my letterbox for quite a while, works well. One tip, put a delay as the end action to prevent multiple triggers if the postman fumbles whilst squeezing large or multiple items through the slot.
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Do you have a metal letterbox? Because I think the metal with affect how the magnetic part of the door sensor works. When I put one on my door, I put it above the metal core and it didn’t detect closing properly 
Or maybe I got a faulty one or did something wrong
It’s stainless steel which isn’t magnetic.
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Right, I forgot that mailboxes are stainless steel
I have been using this as well. It works perfectly fine until some postman tries to push in a package that barely fits. That always dislocates the sensor. Since our postmen do this regularly I gave up on replacing it. Maybe I’ll switch to another device.
Yes, I have a friend who does this and wrote a routine in HA so that when the letterbox opened, Alexa announced “You’ve got mail.” lol Drove his wife nuts!
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Mine uses an MP3 of the original AOL “You’ve got mail” announcement! I was thinking of changing it to the Joanna Lumley British version “You’ve got post”.
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