I own a LPW pool and with it comes a PoolControl 2 ECO control unit. Now I have seen that there is a ModBus connector on the motherboard, labelled JP4. I would like to read out the PT1000 temperature sensors for water and air temperature. Has anyone managed to achieve this?
BTW - this is JP4 - looks exactly like a ModBus connector:
I’ll write to the pool manufacturer and ask how to do this…
I received the following answer:
We do not work with the Modbus protocol.
There are only commands between the modules and the display.
It is possible to read the date coming from the display.
There is a payload of data every 10 seconds
Parameters: 57600bd, 1 stop bit, no parity
The first 4 values after the serial number are measured water temp, air temp, water level, and solar temp.
Do not, under any circumstance send data to the bus.
Does anyone know how to read out the data with the description above? Is it possible to do this with a serial/TCP-converter like HF5111S?
I have a similar controller and was trying to do the same thing. Ideally I’d also like to send commands for the cover, lights, etc but I haven’t gotten that far yet (just had it installed).
For reading out the temp sensors the easiest way I found was to use Node-Red.
Basically you set the remote server address on your controller to your Node-Red.
There you accept and parse the data, publish it to MQTT. In HA you then create the corresponding MQTT sensors.
You can set Node-Red to forward on the data so you don’t lose the PoolControl app functionality.
I just set mine up and so far it seems to be working but I’m sure it’ll need some more work.