Ok…we have control of on/off from HA. I added a Shelly 1 Plus (important since you need dry contacts). I replaced the black microswitch with the Shelly. The Shelly itself is powered by tapping into the power block on the back of the machine where the main power line comes in. Some additional findings:
- The main power relay for the machine will stay energized unless you:
A. Unplug the machine.
B. Hold down the power button (really from holding down the white switch).
- The white microswitch is for signaling power down/power up when the circuit state changes. This is the 5V circuit mentioned in the first post.
- When turned off, after some period of time, the main relay will power down.
With the Shelly in place of the black switch:
- You can turn on the machine when fully powered down. You cannot turn off the machine (we’ll just rely on the auto-off feature here).
For disassembly:
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Remove the front tray and remove the four screws. These are all T-15 torx.
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Remove the cover for where the service port is.
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Remove the back most screw. This is also a T-15.
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Remove the back cover with the emblem. This will take some light prying. Just start at a top corner and work your way inward.
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Remove the two “Jura” screws behind the cover you just removed. You can use the actual tool or a pair of small needle nose pliers.
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Remove the side panels by pulling them back. If you’re facing the back of the machine, remove the left panel first and then the right.
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Underneath the button is a cover with a single screw. This one is a T-10 torx. The cover has two tabs holding it on. Pry the backside tabs first and then the front side tab. The cover can be removed with the top in place, but will require a little shimmying.
I forgot to grab a picture but will grab one later
- The two switches can be removed by pulling them away from the mounting bracket.
Remove both wires from the black switch and connect them to the input/output of a dry contact switch. I wanted to easily undo anything I’ve done so I opted to use a short jumper wire with female spade connectors plugged into the existing male connectors on the PCB. This way, I could tuck the microswitch along with the factory wiring away to be able to easily undo the mod. If using the Shelly, just connect the line and neutral to the existing wiring block in the back of the machine to power the shelly. It’s tight but I was able to get the wires in even using 14 ga solid core wire.
I’d highly suggest triple checking your connections and then testing everything at this point. Plug the machine back up (did I mention to triple check your connections). Toggle the relay from the Shelly web interface, HA, etc. and the machine should power on.
Store the black switch away somewhere and put the white switch back in place. Reassemble.
There is no indication I opened the machine, aside from some minor scratch marks on the “Jura” screws (which can be touched up with some nail polish if needed) and everything can be quickly reverse with no evidence that the machine had been touched.
Housekeeping:
- Set the Shelly to default to “on” when powered up.
- Set your automation to toggle the Shelly off and back on to turn on the machine
…I just managed to decrypt the “app to dongle” IP connectivity (which includes some traffic to the Jura cloud service), but there’s still the higher level obfuscation/encryption being used. I haven’t done much past that.
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