OpenSprinkler › Forums › Hardware Questions › OpenSprinkler Pi (OSPi) › OSPi with one Exp board (and set to Exp=0) › Reply To: OSPi with one Exp board (and set to Exp=0)
November 20, 2014 at 11:57 pm #34765
This may have to do with the way the OSPi source code sends data to the shift register. In the microcontroller-based OpenSprinkler, the firmware always sends padding of 0’s so stations on the expansion boards will not be accidentally activated.
When you say ‘with expansion baord running on your breadboard’, what do you mean? Do you have a fully assembled expansion board bought from us or did you build one on the breadboard yourself?