[iotawatt] Initial contribution

[PRosenb]

This PR adds a new binding for IoTaWatt, an open source power measuring device.

Limitations of this version:

• No authentication support

Short discussion about the topic: Forum thread IoTaWatt

Any kinds of feedback is welcome, thank you.

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[openhab-bot]

This pull request has been mentioned on openHAB Community. There might be relevant details there:

https://community.openhab.org/t/iotawatt/153849/3

[lsiepel]

Thansk for this contribution. In general it seems already solid. Besides the minor comments, i guess there are two areas that i have questions about:

1. exception handling / thing status details, see comments.
2. thing-types. I see several power/energy rel;ated channels that have diffent quantitytypes declared compare to others bindings that have the same channels. Please double check.

[PRosenb]

Many thanks @lsiepel for reviewing my PR by the way.

2. thing-types. I see several power/energy rel;ated channels that have diffent quantitytypes declared compare to others bindings that have the same channels. Please double check.

When I implemented the types, I was also not sure which ones to use. I had a look at the Shelly binding because I use it and it has quite a lot of types. Which one did you compare it to? What do you feel should it be changed to?
I hope we can get them right.

[lsiepel]

Final comments added. According to the docs, the power related channels types are good. Only the units should be replace by a placeholder.

[PRosenb]

@lsiepel I have issues with %unit% and mentioned it on your comment, but unfortunately is it hidden now.
Do you have a clue why it's not working, at least on my set up?

[lsiepel]

@lsiepel I have issues with %unit% and mentioned it on your comment, but unfortunately is it hidden now. Do you have a clue why it's not working, at least on my set up?

Hmm maybe try %% as unit. i have to search, but percentages have a different handling since a while. You can also check some otherbinding setting a percentage value.

[PRosenb]

Thanks for your hints @lsiepel and @jlaur. It was not an issue of the channel-type definition but only of the item definition in the readme where the dimension was missing. Now it works like a charm.

[lsiepel]

Thanks for your contribution. LGTM.
Let me know once you think this binding is tested enough to merge.

[PRosenb]

Thanks for your contribution. LGTM. Let me know once you think this binding is tested enough to merge.

Many thanks for your review and good inputs @lsiepel. I tested it on a test setup but haven't yet installed an IoTaWatt on my switchboard because I need an electrician for that. I will have it installed in the coming weeks, set it up to monitor the whole house and integrate it into my rules. Should I find bugs at that stage I'll submit bug fixes.

[lsiepel]

Now, you could add your binding's logo to the openHAB website. `
See https://www.openhab.org/docs/developer/addons/#add-your-add-on-s-logo-to-the-openhab-website

Please also see the updated documentation here - SVG is now preferred:
https://next.openhab.org/docs/developer/addons/#add-your-add-on-s-logo-to-the-openhab-website-and-the-ui