hi thx will have a look
Hi, do you have complete the configuration in your Eastron via modbus RS485?
I have bought same Eastron, should be share with me your configuration?
Thank you,
Hi and welcome to OpenHAB
You are not asking novice questions at all,these are great, practical questions and you have already thinking in the right direction. I will try to break it down step by step based on your use case.
OpenHAB Server
You can definitely run OpenHAB on your Synology NAS though some models may need a bit of extra setup. Alternatively, a raspberry pi or an old windows pc also works well.
Check if your NAS supports docker or java as that will be key for running OpenHAB.
Connecting Smart Meter
Yes, using a P1 to USB cable is a common way. Most USB P1 readers use a serial-to-USB chip like FTDI or CH340. On Linux-based systems drivers are usually included. For Windows, you might need to install the driver manually.
OpenHAB has P1 binding support so once connected, it can read consumption and delivery from your grid meter.
Connecting Modbus KWh Meters
You have right again,you will need:
- RS485 Modbus KWh meters
- A USB to RS485 adapter
On Linux, again, drivers are often already present. For Windows, the USB adapter may need a driver install.
Then you can use the Modbus Binding in OpenHAB to communicate with your meters.
Visualization and Data Analysis
Yes, OpenHAB can:
Persist data using InfluxDB, SQLite, or other backends
- Create charts and graphs with **Grafana
- Perform calculations and aggregations using rules or transformations
- Compare solar production, grid consumption, EV charging, etc.
You can do a lot of this without needing to code, especially using the UI. Some custom logic (e.g., calculating efficiency) may need a simple script or rule, but the community has lots of examples.
Final Thoughts
You’re on the right track. Here’s what I’d recommend:
- Start with the P1 meter using USB → confirm it reads in OpenHAB
- Then add a Modbus USB adapter + KWh meter and get that working
- Add persistence and graphs (InfluxDB + Grafana is popular)
- Expand from there
Let me know your NAS model or what you choose to run OpenHAB on, and I’ll gladly help you through setup steps!
Good luck,you have got this
Let me know if you dolike to tailor this response with your own hardware or preferences.
or Wifi/Ethernet to modbus converters like Elfin Ew11 or similar
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