# \[APP\]\[Pro\] Piggy Bank

**URL:** <https://community.homey.app/t/app-pro-piggy-bank/66677>\
**Category:** Apps\
**Tags:** app, tools, homey-pro\
**Created:** [July 29, 2022, 10:07pm UTC](https://community.homey.app/t/app-pro-piggy-bank/66677 "2022-07-29T22:07:19Z")\
**Posts on this page:** 1\
**Showing post:** 167

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**Author:** ![frodeheg](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/frodeheg/32/49010_2.png) [@frodeheg](https://community.homey.app/u/frodeheg)\
**Post date:** [October 14, 2022, 7:39pm UTC](https://community.homey.app/t/app-pro-piggy-bank/66677/167 "2022-10-14T19:39:58Z")

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> [@Robert\_Schmidt](#):
>
> This is a readout value, you can’t set it.

Right, it was read-only, I didn’t notice.  
But I see there is one writeable capability named “charging”, So I can use this.

However I cannot see any power-meter readings or controller, so it’s only on/off and it uses what it uses, right?

> [@foni](#):
>
> So. Turn on/off shold be used for swtching heating, varm water etc. on/off depending on price?

If it has a thermostat capability I would recommend you to turn on temperature control, this will be much more convenient for price control.

> [@foni](#):
>
> If on and max power limit is reached will it then be turned off and on again when there are available power?

Yes

> [@foni](#):
>
> And where does the insight get the current price from?

The prices are fetched from [Entsoe](https://transparency.entsoe.eu/transmission-domain/r2/dayAheadPrices/show?name=&defaultValue=true&viewType=GRAPH&areaType=BZN&atch=false&dateTime.dateTime=14.10.2022+00:00%7CCET%7CDAY&biddingZone.values=CTY%7C10YNO-0--------C!BZN%7C10YNO-1--------2&resolution.values=PT15M&resolution.values=PT30M&resolution.values=PT60M&dateTime.timezone=CET_CEST&dateTime.timezone_input=CET+(UTC+1)+/+CEST+(UTC+2)), it should be the same prices as Noordpool except in euros. I use the day to day conversion rates from Norges bank to convert to NOK. Then on top of that, VAT and grid cost is added.

However… as you speak about it… I’m not sure if I did reset the prices when you change price zone. So maybe you have discovered a bug. Let me know if the prices are still off in 24 hours.

EDIT: I checked the code and it is indeed a bug. I will fix it in the next version. You can track it [here](https://github.com/frodeheg/no.sparegris/issues/11)

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