How to receive and store JSON indications

Configuration
1

Hi,

I have this MEP card (power meter extension) that sends out indications about consumption every 20 seconds. I need to monitor these. I’m totally new to HA but figured that should be possible? The indications are JSON and the schema cannot e changed…so I need “something” in my HA that can be configured to accept this JSON and parse it.

I found some links but the use cases in those links are all about the HA polling some other API. But in this case I need to “create” the API in HA and just accept whatever the MEP card sends…Is that possible?

Thanks.

2

If it’s not polling, what protocol is used by your card to “push” updates?

3

It is just using HTTPS to send JSON formatted POST request.

4

Then, assuming you can configure the target url of those pushes, an automation webhook might fit the bill:

You’d have to use an input_number, and, in the automation, to extract values and use the input_number.set_value to position “variables”.

Might be a tad cumbersome, though…

5

Unfortunately I have zero configuration possibilities on the MEP card communication. It has a fixed IPv6 address and it pushes consumption indications to another fixed (!) IPv6 address. So I need to grab data on the url “https:<IPv6_TargetAddress>/meterdata”. This is crap I know but this is what is possible. So right now I have my Synology (where HA is installed) configured as that target IPv6 address so the indications are flowing - but something on my Synology (preferable HA) has to accept the JSON on the “/meterdata” endpoint.

6

Then, you will have to have a reverse proxy on the Synology. HA won’t accept “/metadata”.

7

Thanks koying, I ended up using a raspberry. Using nodeJs I have full control and can use the webhook features to get the data into HA…