OpenSprinkler › Forums › OpenSprinkler Unified Firmware › V3.0 upgrade to 2.1.9 bricked unit! › Reply To: V3.0 upgrade to 2.1.9 bricked unit! November 11, 2020 at 2:04 am #68641 DaveParticipant Update: Tried to power it using the micro-usb port on the ESP8266 Main Controller board. I see a flash of the blue LED on the wifi sub-board but still no joy. Same result with or without the 8-Zone 24VAC power board plugged in. Thanks. Dave.
