I'm on a quest for wireless coffee.

I've succesfully hacked my Nespresso with a NodeMCU that will now let me wirelessly make a coffee. That is, when the machine is already on. I need to figure out a way to turn it on programatically also, but the button for turning on is different.

After opening up my Nespresso Lattisima+ (model EN520) I found this push button - a kind of button that I don't know.

enter image description here

How do I find out how it works (i.e. which pins to solder my relay onto in order to switch it on programmatically) without killing myself?

I see a F5 and SW1 next to some pins, but on the back of the printboard I can see that there are pins "hidden", meaning big white block as well.

Thx for helping me stay alive and curious :)


1 Answer 1


Bär (Baer without the umlaut) is now a brand of Johnson Electric. Check their website:


Seems these "Tippmatic" switches have some timer built-in.

  • 1
    \$\begingroup\$ Searching for [Tippmatic 3620] turns up more information. See page 77-78 of contact-evolution.ch/files/burgess-switch-catalogs.pdf for pinout. \$\endgroup\$ Dec 28, 2016 at 3:30
  • \$\begingroup\$ thanks guys - I tried searching for stuff on the pushbutton, but nothing came up - did you guys just know this or is there a logic to finding out? \$\endgroup\$
    – Jakob
    Dec 28, 2016 at 10:45
  • \$\begingroup\$ You proably searched for BAR instead of BÄR. The umlaut is significant. I then googled "bär switch" ("baer switch" is the same) and got a catalogue of Johnson Electric. \$\endgroup\$
    – Janka
    Dec 28, 2016 at 20:59

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