Seeing as how development of this plugin has unfortunately stalled or has been abandoned.
Here is another way to get the variable speed pump data into Indigo:
1 - Install Dave's wonderful GhostXML Plugin https://www.indigodomo.com/pluginstore/38/
2 - Create a GhostXML device for your pump. (do not use digest authentication, use the following format in the URL/Path Field) : http://user:pass@yourautelis-IP/pumps.xml
3 - That's it.. Enjoy your new pump data!