Resol VBUS success
at last, the kind folks in Resol sent me the protocol specification for vbus with openwrt and rrdcollect and rrdcgi, I can now graph the pumps and temperature information of my solar water system. There is a bash script that collects from the serial port, decodes it , and then outputs the values to a file that rrdcollect parses. All good, some holes in the graphs, probably a bad awk in my script, to be investigated. Once it's working reliably with no holes, I will try to post graphs here, somehow EDIT: Now there is a google group http://groups.google.com/group/resol-vbus EDIT: I wrote a utility to parse the data, seems to have gotten lost in the group, it's here https://code.google.com/p/vbusdecode/
Comments
Looks like you have a gap with the pump controller running at full speed also? Can you plot pump speed on the same graph? It looks very similar to my issues.
if you look at current graphs, you can see that the graph of the second pump has reached 100% for a period of time (it isn't connected to anything, and is part of the thermostat function).
I have the english version of the vbus doc now, here it is