OpenSprinkler › Forums › Hardware Questions › OpenSprinkler › cant upgrade firmware from 2.0.9 › Reply To: cant upgrade firmware from 2.0.9 July 17, 2018 at 2:33 pm #51173 RayKeymaster I am not quite sure how the updater was trying to upload firmware 2.1.7 to the controller — since you have OS 2.1, the firmware updater disables firmware 2.1.6 and 2.1.7 for OS 2.1 because they cannot be uploaded through USB.
