# Which Shelly Devices report current AC Voltage over MQTT?

**URL:** <https://discourse.nodered.org/t/which-shelly-devices-report-current-ac-voltage-over-mqtt/89405>\
**Category:** Hardware\
**Created:** [10 July 2024 16:13 UTC](https://discourse.nodered.org/t/which-shelly-devices-report-current-ac-voltage-over-mqtt/89405 "2024-07-10T16:13:27Z")\
**Posts on this page:** 10\
**Page:** 1

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**Author:** ![DocPrinter](https://avatars.discourse-cdn.com/v4/letter/d/aca169/32.png) [@DocPrinter](https://discourse.nodered.org/u/DocPrinter)\
**Post date:** [10 July 2024 16:13 UTC](https://discourse.nodered.org/t/which-shelly-devices-report-current-ac-voltage-over-mqtt/89405/1 "2024-07-10T16:13:27Z")

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Afternoon All,

Looking to make a return to my home automation projects, with a soft start looking at monitoring current AC Voltage.

I was looking at either " Shelly 1 Mini Gen3" or " Shelly PM Mini Gen3". Regardless of device choice it will be mounted into an enclosure and connected to the mains on through a standard UK three pin socket. No load will be attached.

Thanks.

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**Author:** ![ghayne](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/ghayne/32/39_2.png) [@ghayne](https://discourse.nodered.org/u/ghayne)\
**Post date:** [10 July 2024 16:16 UTC](https://discourse.nodered.org/t/which-shelly-devices-report-current-ac-voltage-over-mqtt/89405/2 "2024-07-10T16:16:34Z")

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> [@DocPrinter](#):
>
> No load will be attached.

If no load then an Athom plug (pre flashed with Tasmota) or similar would do the job.

> **[Tasmota UK Plug V2 | athom](https://www.athom.tech/blank-1/tasmota-uk-plug-v2)**
>
> Tasmota UK Plug Upgraded new version , HLW8032 consumption monitoring chipset build in, NO calibration needed, The measurement error of active power about 0.2%The measurement error of effective current is 0.5%The measurement error of effective...

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**Author:** ![DocPrinter](https://avatars.discourse-cdn.com/v4/letter/d/aca169/32.png) [@DocPrinter](https://discourse.nodered.org/u/DocPrinter)\
**Post date:** [10 July 2024 17:08 UTC](https://discourse.nodered.org/t/which-shelly-devices-report-current-ac-voltage-over-mqtt/89405/3 "2024-07-10T17:08:30Z")

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@ghayne supply to the UK looks a little dubious. Their shipping info page says something alng the line of; if an international shipped item hets lost you shouldn't seak a refund!

That said, an address isn't forthcoming n the shelly store site either, so that could also be either international shipped or a drop shop.

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**Author:** ![DocPrinter](https://avatars.discourse-cdn.com/v4/letter/d/aca169/32.png) [@DocPrinter](https://discourse.nodered.org/u/DocPrinter)\
**Post date:** [10 July 2024 17:17 UTC](https://discourse.nodered.org/t/which-shelly-devices-report-current-ac-voltage-over-mqtt/89405/4 "2024-07-10T17:17:56Z")

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Beg their pardon. Shelly Store is a trading name for "Advanced IOT Ltd" who have an address at " 158 Cromwell Road, Salford". That's just the accountants though.

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**Author:** ![DocPrinter](https://avatars.discourse-cdn.com/v4/letter/d/aca169/32.png) [@DocPrinter](https://discourse.nodered.org/u/DocPrinter)\
**Post date:** [10 July 2024 18:04 UTC](https://discourse.nodered.org/t/which-shelly-devices-report-current-ac-voltage-over-mqtt/89405/5 "2024-07-10T18:04:05Z")

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I've had a response to my support quiry to Shelly Store. The plain switches do not report voltage, you need a "PM" device for that.

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**Author:** ![ghayne](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/ghayne/32/39_2.png) [@ghayne](https://discourse.nodered.org/u/ghayne)\
**Post date:** [10 July 2024 18:45 UTC](https://discourse.nodered.org/t/which-shelly-devices-report-current-ac-voltage-over-mqtt/89405/6 "2024-07-10T18:45:55Z")

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But why connect a plug to a Shelly in an enclosure when an energy measuring smart plug will do the job? I have bought Athom plugs in the past, they do deliver to the UK.

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**Author:** ![Paul-Reed](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/paul-reed/32/66906_2.png) [@Paul-Reed](https://discourse.nodered.org/u/Paul-Reed)\
**Post date:** [10 July 2024 19:57 UTC](https://discourse.nodered.org/t/which-shelly-devices-report-current-ac-voltage-over-mqtt/89405/7 "2024-07-10T19:57:10Z")

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@DocPrinter Theres always AliExpress...  
£10.57 - free delivery.

[https://www.aliexpress.com/item/1005006974309859.html](https://www.aliexpress.com/item/1005006974309859.html)

@ghayne Garry, is this the same model as your link? Matter??

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**Author:** ![ghayne](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/ghayne/32/39_2.png) [@ghayne](https://discourse.nodered.org/u/ghayne)\
**Post date:** [10 July 2024 21:03 UTC](https://discourse.nodered.org/t/which-shelly-devices-report-current-ac-voltage-over-mqtt/89405/8 "2024-07-10T21:03:47Z")

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Looks like, it says "Matter" in the description too.

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**Author:** ![craigcurtin](https://avatars.discourse-cdn.com/v4/letter/c/94ad74/32.png) [@craigcurtin](https://discourse.nodered.org/u/craigcurtin)\
**Post date:** [10 July 2024 23:56 UTC](https://discourse.nodered.org/t/which-shelly-devices-report-current-ac-voltage-over-mqtt/89405/9 "2024-07-10T23:56:02Z")

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> [@DocPrinter](#):
>
> @ghayne supply to the UK looks a little dubious. Their shipping info page says something alng the line of; if an international shipped item hets lost you shouldn't seak a refund!
> 
> That said, an address isn't forthcoming n the shelly store site either, so that could also be either international shipped or a drop shop.

I use a lot of these prefalshed with Tasmota (i am in Oz) - their storefronts for each country are just a front for their Aliexpress setup and warranty issues are not handled well - having said that - of the 10 odd that i have here that have been purchased over the last two years i have only had one failure.

They are great under light load - the one failure was on a clothes dryer which pulls 8amp for an hour or so at a time each cycle.

They have inbuilt calibration and voltage is calculated very accurately (based on a cross check with my sons very expensive Fluke)

Craig

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [24 July 2024 23:56 UTC](https://discourse.nodered.org/t/which-shelly-devices-report-current-ac-voltage-over-mqtt/89405/10 "2024-07-24T23:56:48Z")

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Closed on 24 July 2024 23:56 UTC

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