Anyone know how to use a smart plug?

Anyone know how to use a smart plug?

Author
Discussion

Leicesterdave

Original Poster:

2,282 posts

186 months

Sunday 4th September 2022
quotequote all
I don’t know if I’m getting this right. I bought two smart plugs, one for my dishwasher and one for my washing machine. I’ve got one of these energy tariffs which has very low electricity cost during the middle of the night. I’d obviously like to set up my dishwasher to run at the times when electricity price is obviously extremely low.

I’ve set this up on the app, but somehow nothing happens. And here I am thinking how can it? The dishwasher is off and I haven’t preset a program so how can I switch on my dishwasher?

Is anyone here remotely Techy and could explain if this works or not. Thank you!

bitchstewie

54,524 posts

216 months

Sunday 4th September 2022
quotequote all
Presume it depends on the device doesn't it?

I thought a smart plug just turns on the mains but then you're into what the devices that are plugged in do.

I wouldn't expect a dishwasher to automatically start the programme the moment you turn on power at the wall.

egomeister

6,842 posts

269 months

Sunday 4th September 2022
quotequote all
The smart plug can only switch power on or off to the device, not do anything beyond that.

Doesn't the washing machine or dishwasher have a delayed start programme as standard?

Bill

53,943 posts

261 months

Sunday 4th September 2022
quotequote all
egomeister said:
The smart plug can only switch power on or off to the device, not do anything beyond that.

Doesn't the washing machine or dishwasher have a delayed start programme as standard?
This. The machine probably defaults to off if there's a break in the power supply.

Scrump

22,791 posts

164 months

Sunday 4th September 2022
quotequote all
Smart plug won’t do what you want it to with those appliances. You need to use the timers built into the machines (if they have them).

mikey_b

2,066 posts

51 months

Sunday 4th September 2022
quotequote all
Dishwashers and washing machines almost always have delay-start timers built into them for exactly this sort of thing. I guess it's conceivable yours don't, but 'cheap power at night' has been a thing for a long time - as has the desire to have the washing machine finish shortly before you are able to empty it, so clothes don't sit damp and creased for ages.

You can use the smart plug for other things - shutting the TV/sky box/DVD player/soundbar (etc) off overnight, for example..

Ham_and_Jam

2,505 posts

103 months

Sunday 4th September 2022
quotequote all
If you’re dishwasher or other appliances don’t have delayed starts then these may work-

https://amzn.eu/d/jm0UORK

Switchbot physical smart button. Will press a button or rocker switch on a timer

essayer

9,486 posts

200 months

Sunday 4th September 2022
quotequote all
Try starting it, then cutting the power, then restoring it and see if the program continues?
Our dishwasher uses 0.9kWh on a cycle fwiw

paulrockliffe

15,959 posts

233 months

Monday 5th September 2022
quotequote all
This worked 20 years ago when you turned the machine on by turning a dial that was a physical switch , but not now.

Those physical button pressers might work, but you might also find that the buttons are too stiff, you can't mount the buttons rigidly enough and the buttons are on the door edge, hidden an inaccessible. You'll also have to contend with the fact that most dishwashers will default to their eco setting on power-on, which doesn't clean anything properly, so likely you need a 2 or 3 button press combination to get the right programme.

I'd think the most robust approach is going to be to open the switches up and solder some extra wires on and back to a smart relay, then put something like Home Assistant on a Raspberry Pi to run a timed sequence of button presses. But this is a lot of faffy messing around!

deckster

9,631 posts

261 months

Monday 5th September 2022
quotequote all
paulrockliffe said:
This worked 20 years ago when you turned the machine on by turning a dial that was a physical switch , but not now.

Those physical button pressers might work, but you might also find that the buttons are too stiff, you can't mount the buttons rigidly enough and the buttons are on the door edge, hidden an inaccessible. You'll also have to contend with the fact that most dishwashers will default to their eco setting on power-on, which doesn't clean anything properly, so likely you need a 2 or 3 button press combination to get the right programme.

I'd think the most robust approach is going to be to open the switches up and solder some extra wires on and back to a smart relay, then put something like Home Assistant on a Raspberry Pi to run a timed sequence of button presses. But this is a lot of faffy messing around!
Sorry, but rofl

The chap can't figure out a smart plug, so the answer is to take his dishwasher apart, solder stuff into the switches, then set up a RPi to schedule his dishwashing?

paulrockliffe

15,959 posts

233 months

Monday 5th September 2022
quotequote all
deckster said:
paulrockliffe said:
This worked 20 years ago when you turned the machine on by turning a dial that was a physical switch , but not now.

Those physical button pressers might work, but you might also find that the buttons are too stiff, you can't mount the buttons rigidly enough and the buttons are on the door edge, hidden an inaccessible. You'll also have to contend with the fact that most dishwashers will default to their eco setting on power-on, which doesn't clean anything properly, so likely you need a 2 or 3 button press combination to get the right programme.

I'd think the most robust approach is going to be to open the switches up and solder some extra wires on and back to a smart relay, then put something like Home Assistant on a Raspberry Pi to run a timed sequence of button presses. But this is a lot of faffy messing around!
Sorry, but rofl

The chap can't figure out a smart plug, so the answer is to take his dishwasher apart, solder stuff into the switches, then set up a RPi to schedule his dishwashing?
Yes I know that, but that's the easiest option he has other than buying a new appliance. I didn't say he could or should do it, but there's no better option if there's no in-built timer now everything is digital.

It's not as hard as it sounds, I reckon 90% of the people that have enough between the ears to think about how to do it could put vaguely the right stuff into Google to work it out if they really wanted to do it. I've no idea if it's worth the time and hassle to the OP or not.

CorradoTDI

1,563 posts

177 months

Monday 5th September 2022
quotequote all
Not sure I'd want a 10+ Amp appliance running through a smart plug!

mikey_b

2,066 posts

51 months

Tuesday 6th September 2022
quotequote all
CorradoTDI said:
Not sure I'd want a 10+ Amp appliance running through a smart plug!
My smart plugs are rated to 16A - says so on the front. I have one on my tumble dryer just to monitor the power consumption over time.

It’s only controlling a relay after all.