RESOL Vbus (RS485) and Arduino.

[solarbot]

Hi,

Wondering if we have any handy Arduino coders here who might be able to help with this one 

I help run our local community/volunteer run outdoor swimming pool and we have recently installed a 21 panel solar heating system which is controlled by RESOL kit. We have a datalogger and SD3 public display but as this is powered off the Vbus no one can read it unless they are having an unoffical night swim. The project is 100% grant funded and one requirement is that we display our data publically - I have been hunting for a working solution and keep coming back to the possibility of using an Arduino to read the Vbus data and display it via an LCD. I can handle some of the coding but not the Vbus (RS485) data intercept - is there anyone out there who might be able to help with this aspect? I have the Vbus protocol and an RS485 arduino shield.

Appreciate any thoughts :-)

[FlibblE]

I messed about with various 485 converters and scopes and couldn't get any sense out of the vbus - it seemed to me that although it's differential it's not really at strict RS-485 levels; although other folks do seem to be able to get on fine with it.
I have the DL2 datalogger and have been able to connect to the ethernet of that and get all the information that way (TCP, I think it's port 7053!). I keep meaning to finish off the software on my Netgear NSLU2 or Nas box, but never seem to get around to it