OpenSprinkler › Forums › OpenSprinkler Unified Firmware › Trouble with Zimmerman Method › Reply To: Trouble with Zimmerman Method March 23, 2015 at 2:42 pm #36207 TomParticipant Screen shot from the OpenSprinkler manual. Tom Attachments:Screen-Shot-2015-03-22-at-6.27.38-PM.png