PowerOcean Public API

[niltrip]

PowerOcean with datapoints from public API

[niltrip]

First try to integrate PowerOcean via public API

[tolwi]

@niltrip the main reason I didn't include your PR in the 1.1.0 release is that I didn't want to postpone the release and together with that I believe, that PowerOcean should become the first device with not plain data json support. jsonpath is already integrated, so you can define your entity mqtt key like 'ems.mpptHeartBeat[0].mpptPv[0].pwr'. Without having the device it is hard for me to provide the initial device support, so I was hoping you could try to implement it this way (I intended to support this approach, but I didn't even try it in real conditions).
PS. Make sure you overrides def flat_json(self) -> bool:

[niltrip]

@tolwi no problem. For me this is the initial decive support ;-). I'm not a programmer but I'll try. So far I've tried to understand your source code. That's why I started a discussion #301 about whether I'm on the right track.