OpenSprinkler › Forums › Hardware Questions › DIY Kit Assembly Questions › SOLVED! Firmware flash OK, but LCD displays rectangle box & stations not working › Reply To: Firmware flash OK, USB OK but LCD displays rectangle box & stations not working!
Just to clarify, the first question was regarding the software not the medium. USB is the only way to update however software wise you may be using our firmware updater GUI or avrdude manually from the command line. If you are using the command line, you have to be sure to download the correct HEX for your hardware version otherwise it will flash and malfunction.