I think it would be a great feature of OS 3.0 if the software of RFToy 3.0 be included into OS. So instead of manual inputting the 16 digit rf code that was decoded using RFToy 3.0 into OS, there would be scan buttons in OS that would decode the signal and would populate the code for you in OS. Therefore, a second device would not be needed and it limits the chance for errors. It appears that RFToy and OS use the same main controller so I would think it would be possible but I don’t know anything about coding.
The current opensprinkler (revision 3.2) no longer has the pin header for RF receiver. It’s because that opening is now used to pass through the wired ethernet module cable. So unfortunately you can no longer insert the RF receiver to it.