I updated the roolloff.ino.standard example with the same structure as the .ar1450 and the how-to description. Its setup is now for the Uno model using pullup resistors. Did a basic test of it using a Uno relay shield. There was an issue after uploading the sketch to the Uno the first use of the connection after that took several seconds to respond. The driver was modified to log a warning before continuing instead of an error. Consider running the build again to pick up these modified files.