But adding the device to the dashboard displays no graph, also when I open the device and hit set graph I get a 500 error, im not sure what its expecting as a string so tried with nothing in there, and also the graph URL
Glad that you got this working ! I'm a complete Hubitat and hubigraphs newbie and, first I think Hubigraphs is a fanatstic piece of work.
But...i keep using datapoints in my graphs: while the right part of my graph keeps filling slowly, once the data are coiming more to the left (it's a timegraph) they start disappearing.
What am I doing wrong?
Can somebody point me to a topic here that I overlooked and is about this kind of problem ?