<![CDATA[Mains voltage current sensor?]]>Any advice on sensing current in mains voltage (240V) circuits?

What I'm trying to do is to monitor the dishwasher and washing machines, so I can sense when they're done and alert someone to go empty them.

]]>https://forum.mysensors.org/topic/6757/mains-voltage-current-sensorRSS for NodeMon, 10 Aug 2026 08:37:59 GMTTue, 02 May 2017 13:18:47 GMT60<![CDATA[Reply to Mains voltage current sensor? on Wed, 03 May 2017 08:58:16 GMT]]>you can make a dash button that when pressed sets a timer on the controller. With sonoff pow you get energy metering and also a relay tu turn on and off your appliance

]]>https://forum.mysensors.org/post/65789https://forum.mysensors.org/post/65789Wed, 03 May 2017 08:58:16 GMT<![CDATA[Reply to Mains voltage current sensor? on Wed, 03 May 2017 08:41:38 GMT]]>The sonoff pow looks interesting actually. 10 USD is a really good price.

]]>https://forum.mysensors.org/post/65788https://forum.mysensors.org/post/65788Wed, 03 May 2017 08:41:38 GMT<![CDATA[Reply to Mains voltage current sensor? on Wed, 03 May 2017 08:39:31 GMT]]>Exactly, I don't want to modify the appliances in any way :)

If I monitor the current drawn by the appliance I can detect both when it starts and when it finishes. With a countdown timer I need to start it myself and if I forget to start it I will not get a reminder when it's done.

]]>https://forum.mysensors.org/post/65787https://forum.mysensors.org/post/65787Wed, 03 May 2017 08:39:31 GMT<![CDATA[Reply to Mains voltage current sensor? on Wed, 03 May 2017 05:52:14 GMT]]>@zboblamont because it's easier to attach a sensor to the power plug instead of hacking the machine's controller 😀. For what is worth, I think that a normal countdown timer will be enough since washing cycles have always the same length.

]]>https://forum.mysensors.org/post/65784https://forum.mysensors.org/post/65784Wed, 03 May 2017 05:52:14 GMT<![CDATA[Reply to Mains voltage current sensor? on Wed, 03 May 2017 04:51:11 GMT]]>@maghac Why measure current? It will vary with the program in use, and so will water consumption. Both devices have controllers, both will signal the end of a cycle and go standby, usually triggering a bleeper, these are usually low volt DC. Tap into that?
You must have a distant machine not to hear it, I can hear the washing machine bleep through a wall, the dishwasher is usually quiet until she finishes, then gets noisy again :stuck_out_tongue_winking_eye:

]]>https://forum.mysensors.org/post/65779https://forum.mysensors.org/post/65779Wed, 03 May 2017 04:51:11 GMT<![CDATA[Reply to Mains voltage current sensor? on Tue, 02 May 2017 18:58:16 GMT]]>Sonoff pow?

]]>https://forum.mysensors.org/post/65769https://forum.mysensors.org/post/65769Tue, 02 May 2017 18:58:16 GMT<![CDATA[Reply to Mains voltage current sensor? on Tue, 02 May 2017 16:38:19 GMT]]>Www.openenergymonitor.org has a lot of info on current, voltage, and power monitoring. It isnt mysensors specific, but it is detailed and can likely be made to work.

]]>https://forum.mysensors.org/post/65763https://forum.mysensors.org/post/65763Tue, 02 May 2017 16:38:19 GMT<![CDATA[Reply to Mains voltage current sensor? on Tue, 02 May 2017 16:14:30 GMT]]>@HenryWhite That would work for the washing machine, but not for the dishwasher I guess as it doesn't move a lot :)

]]>https://forum.mysensors.org/post/65762https://forum.mysensors.org/post/65762Tue, 02 May 2017 16:14:30 GMT<![CDATA[Reply to Mains voltage current sensor? on Tue, 02 May 2017 15:56:31 GMT]]>@maghac said in Mains voltage current sensor?:

so I can sense when they're done and alert someone to go empty them.

If you just want to do that, you could also use a vibration sensor to determine whether the dryer/ washing machine has finished or not.

]]>https://forum.mysensors.org/post/65760https://forum.mysensors.org/post/65760Tue, 02 May 2017 15:56:31 GMT<![CDATA[Reply to Mains voltage current sensor? on Tue, 02 May 2017 14:05:34 GMT]]>@maghac - I have just ordered som parts im going to play around with.
I bought the 30A current sensor but there are also som clamps so you dont have to make any cuts into wires:
https://www.mysensors.org/store/power

I think im going to build a portable Swedish plug standard machine, something looking like a relay but measures current.
https://ae01.alicdn.com/kf/HTB1WHv.MpXXXXcwXFXXq6xXFXXXA/AC-230V-Digital-16A-LCD-Electric-1W-3680W-Power-Energy-Meter-Voltage-Wattage-font-b-Current.jpg

]]>https://forum.mysensors.org/post/65750https://forum.mysensors.org/post/65750Tue, 02 May 2017 14:05:34 GMT