Community
OpenEnergyMonitor

Community

Zigbee inputs

Hi all,

I just installed solar panels hooked up to APSystems micro inverters. Those micro-inverters communicate with APSystems ÉCU unit which can be used to monitor production and other parameters.

I am looking for a solution to grab the zigbee signal emitted by the micro-inverters and to feed it into my émondage… any suggestion on how to get started?

A search didn’t yield much, aside from the zigbee2mqtt plugin which seems to work the other way around to control zigbee devices from Matt.

Thanks!
Franck

I thought it was bi directional. Fairly sure it picks up status from paired devices (if they send it).

[edit]
I see there is a discourse and forum so I’d ask there http://www.zigbee2mqtt.io. Once published as an mqtt topic, importing the data should be simple.

you need to add the new device to zigbee2mqtt configuration file -
http://www.zigbee2mqtt.io/how_tos/how_to_support_new_devices.html

zigbee2mqtt works in bidirectionally you can control a device as well as get info from a device… to get the most from it flash the usb zigbee sniffer with the newest z-stack firmware…

I found this to be the easiest step by step method

but just using the the newest z-stack firmware listed above.

once you get working you could then submit it to zigbee2mqtt forum to get it add to the list of supported devices

1 Like

Thanks for the answers, the “sniffers” was the piece I had missed.
Between hacking my emonbase without breaking updates, getting the zigbee hardware/software stack working, and working out the proprietary APSystems zigbee format this looks like a pretty involved endeavor, so I’ll probably take some time to research alternatives.

For example using node-red to scrape the APSystems ECU web application :slight_smile:

Franck

I’m not a fan of loading everything on one RPi - too much to break. I have a PiZeroW setup just for my zigbee gateway. It has just sat there and done it’s job no bother.

1 Like

actually to get itt (the zigbee bridge) to work is not that difficult - while never did on RPi which is well supported I did mine on openwrt router platform so I had to jump an extra mile to get it to work… but setting up new devices are actually not that difficult - generally just a little trial and error- copy and paste for the most part

1 Like

It will likely depend exactly which model of ECU you have. It sounds new so could be the ECU-R. If you ever find a web interface on the model to post how you get to it! As far as I can see that web interface trick was only available on the ECU-3.

I have an ECU-C; spying on the web UI I found the request that gets graph data - it is a bit crude but it does what I need:

Request URL:  http://192.168.1.xxx/index.php/realtimedata/old_power_graph
Content-Type:  application/x-www-form-urlencoded; charset=UTF-8
Body: date: 2019-06-26

Response body: {"power":[{"time":1561520645000,"each_system_power":0}, ...

The times are Unix epoch timestamps, I call the URL every 5mn (that’s the rate at which the ECU-C updates) and I grab the last entry in the power array. That in a node-red process, so I just post to MQTT and emoncms takes over from there :slight_smile:

Franck