Search for: Log In Register OpenSprinkler › Forums › Hardware Questions › OpenSprinkler Pi (OSPi) › RF wireless – Old Version OSPi This topic has 2 replies, 2 voices, and was last updated 6 years, 6 months ago by Anonymous. Viewing 3 posts - 1 through 3 (of 3 total) Author Posts March 14, 2018 at 1:21 am #49339 AnonymousInactive Hey is there any way to hook on an wireless transmitter to the old OSPi which has the extra relay on it? March 14, 2018 at 3:29 am #49342 AnonymousInactive Hi, I am not sure about an extra relay, but I managed to hook up a 433mhz transmitter and hc-sr04 to the unused GPIO pins on the Pi, without affecting the OSPi. You can see the pins used and available in the end of the OSPi docs. March 18, 2018 at 11:45 am #49374 AnonymousInactive Cool that’s an option that I should try out. Thanks. Author Posts Viewing 3 posts - 1 through 3 (of 3 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In OpenSprinkler › Forums › Hardware Questions › OpenSprinkler Pi (OSPi) › RF wireless – Old Version OSPi