How to use the SieHabenPost extension to see if there is mail in your hardware mailbox

You can use the SieHabenPost fheME plugin to extend the displayed control of a FHEM dummy device in order to see if there is mail in your real-life mailbox.

This is how I did the hardware part (this depends of course on your mailbox):

• Get yourself two things: Saia Miniatur-Microschalter and FS20 Funkfernbedienung S4
• Wire them together so that the micro switch sends a signal via the remote control when released.
• Put it all on your mailbox with double-sided tape, glue or a Tesa power strip.

On my mailbox it looks like this:

And it looks like this in fheME:

The software part:

• Create a device "BK1" in fheME for the S4 button which gets "pressed" when the micro switch is released.
• Create a notification which is triggered by BK1:dimup and then executes the following code: { fhem("set Briefkasten on");; }
• Create a dummy device "Briefkasten" which uses the extension "Briefkasten".