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Thread: Coffee machine and home automation

  1. #21
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    Ok, I've dug out my multimeter, what could possibly go wrong! I'll simply see if I can determine what voltage goes across what point on the switch. On a serious note, can I do damage by putting the multimeter on certain points? For example two positive points or two negative points?
    SDB|F83E

  2. #22
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    Ok, I've put the multimeter on the switch and found that there's permanently 5v across it. So when the button is pressed, the voltage is cut and this turns the machine on or off. Whether the machine is on or off, the voltage remains other than the momentary press of the button. Not sure what this means for the plan but I'm sure I can't break that voltage by other means without interfering with the original button.
    SDB|F83E

  3. #23
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    Right, I took a gamble and shorted the two points were the 5v is... And it turns the machine on and off! So if I wire the relay part of a Wemo Maker to there, surely I'm in business?
    SDB|F83E

  4. #24
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    I've traced the wires which go to the connector on the board and I'm considering using Scotchloks to keep things neat and avoid soldering.

    http://solutions.3m.co.uk/wps/portal...tap-connector/
    SDB|F83E

  5. #25
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    Excellent, keep going as I want to mod my barista express in the same way. Can the wemo have a timer set to it and how would you do the momentary press equivalent using it?

  6. #26
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    The Wemo Maker can be configured to either on/off or momentary connection. You can set timers using the Wemo app and add additional configuration using IFTTT.

    I think I'm going to go ahead and or a Wemo. Just need to work out a means of getting a 5v USB supply inside the machine. I could alternatively power this from outside but would prefer to keep everything as factory looking as possible.
    SDB|F83E

  7. #27
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    Quote Originally Posted by Sean View Post
    I've traced the wires which go to the connector on the board and I'm considering using Scotchloks to keep things neat and avoid soldering.

    http://solutions.3m.co.uk/wps/portal...tap-connector/

    In my experience Scotchlocks aren't very good in damp conditions.
    They corrode very easily. (Have repaired too many wiring looms damaged by people fitting tow bars with scotchlocks!)

    Would advise a soldered joint and heatshrink protection....... Looks better also.

    Would be ok as a temporary solution to confirm your theory.........

    Good luck and I hope you get it sorted.......

  8. #28
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    Why do you need a 5v supply in the machine? Can't you use a normally closed relay, activated by the wemo to break the circuit on the switch as you observed?

  9. #29
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    I traced the wires all the way back to the main board in the back of he machine so the Scotchloks will be as far from damp as possible and I might silicone seal them too.

    The Wemo needs to be powered.
    SDB|F83E

  10. #30
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    Ahh ok - is it a wemo maker that you are going to use? Just had a look at one and it all makes sense now. What a great gadget!!

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