I also want to thank you for providing these instructions and also the startup script. We actually have merged your script into our repository for all users here: https://github.com/OpenSprinkler/OpenSprinklerGen2/blob/master/OpenSprinkler.launch. The script is installed if OpenSprinkler is not detected in the init.d folder when running the build.sh command. This means steps 6 through 9 of your steps will no longer be needed moving forward.
I also changed the build_ospi.sh into just one build script (to reduce the amount of build scripts in the long run). So now, for step 5, it is best to run: ./build.sh ospi. The available options are: ospi, osbo, and demo with ospi being the default option.
Thank you!