OpenSprinkler › Forums › OpenSprinkler Unified Firmware › Trouble with Zimmerman Method › Reply To: Trouble with Zimmerman Method November 1, 2015 at 10:37 pm #40648 RayKeymaster @sean1: sorry if I lost track: which firmware version are you running? If you are not already running the latest firmware 2.1.6 I suggest that you update to the latest firmware.