4 ms·

I use a zigbee smart outlet with power monitoring for this. If it's using power for awhile, set to washing. If power has been zero for awhile, and it's washin

• hcaz 4y ago
  This is a clever way to make non smart appliances smart, it works for washers, dryers, dishwashers etc. You could even use this to detect when a dehumidifier fills its tank and stops itself.
• iengae 4y ago
  This! I am doing a similar thing with only Home Assistant, i.e. without Node RED. No need for „smart“ appliances and reverse engineering their protocols if all you want is to be notified when the washing cycle is over.
• idatum 4y ago
  I use CT (current) sensors on the circuits for both washer and dryer and a small XBee ZigBee device using its ADC pins to transmit the current readings. On the server with an XBee coordinator, I use a moving average window to cover points where the washer or dryer use very little current. It's then pretty easy to detect on/off, and even where the current cycle is. The obligatory Home Assistant integration notifies household members. Plotting the dryer data, you can see how it works. The heating element turns on for a period, then turns off and the humidity is most likely read at that point. The gap between periods of the heating element on increases, and the heating length of time decreases, until if stops spinning. Cool DIY project.