1.9 KiB
| title | author | tags | categories | date |
|---|---|---|---|---|
| Sofar-HYD6000-ES-ModbusRead | Andy Whittaker | Modbus, Node-RED, Emon, RS422, Sofar Inverter, Hybrid, HYD6000-ES | Solar PV | 2020-05-28 |
Sofar-HYD6000-ES-ModbusRead
This is a very badly written Python Script to Request and Read Data from the HYD6000 Inverter RS485 Port and Write To EmonCMS (or EmonPi).
Since we require the script to be called at regular intervals, I have also included a very simple Node-RED script to call the Python code (currently) at 30 second intervals.
Interfacing with the HYD6000
We require to interface between the Raspberry Pi and the Sofar HYD6000 inverter via RS485. On the bottom of the HYD6000 you can find the interface connections.
The CAN/485m connection goes off to the batteries. However, the next interface available is the RS485s connection, Sofar even gives you the correct connector to plug-in (it looks to me like a Phoenix/ Weidmüller Type).
We now need a cheap USB to RS485 (which is a two wire interface) to allow us to connect to our Raspberry Pi. Note RS485 is completely different from RS232, do not attempt to use the wrong interface. log-on to eBay and search for RS422 interfaces and you will have one in your possession within a few days. If you would like to read up about the differences between RS232, RS422 and RS485, please have a short Google search for them. RS422 and RS485 are similar, just full-duplex verses half-duplex.
Link the interface up with the inverter with a length of CAT5 pair of wire. Be sure to match-up the + and - connections on either end. In my case, TX- connects to D- and TX+ connects to D+.