@kabbak, my Zimmerman method is working on 2.1.6. Would you be willing to post your zimmerman option settings and the Weather Underground station’s pws ? Happy to check to see if I get the same results.
A couple of quick questions:
1) Can you tell us the exact version number of the firmware i.e. 2.1.6 (1) or 2.1.6 (2).
2) When you say “the adjustment method options don’t seem to accept my changes” do you mean one of the following: 1) you change the options, press submit and then restart OpenSprinkler but the changes have not been remembered, 2) that changing the settings is remembered but seems to have no impact on the watering % or 3) there are options in the UI that you cant edit e.g. baseline temp/rain/humidity.