OpenSprinkler › Forums › Hardware Questions › OpenSprinkler Pi (OSPi) › Hardware Revision V.1.42+ GPIO assignment › Reply To: Hardware Revision V.1.42+ GPIO assignment May 18, 2015 at 3:41 pm #37770 RayKeymaster The latest version is 1.42, which is pretty much the same with 1.4, except the relay has been replaced by a pin header to plug in an RF transmitter (to support RF stations). The used/unused GPIO pins are exactly the same as 1.4.
