OpenSprinkler › Forums › OpenSprinkler Unified Firmware › Which hex file for a blank atmega644 ? › Reply To: Which hex file for a blank atmega644 ? May 21, 2015 at 8:53 pm #37871 RayKeymaster @Randy: I don’t understand why your OS2.2 has 12MHz. Did you buy it from us? All OS2.2 units come with 16MHz crystals.
