I don't know of a schematic for the device or a code repository for it (most likely it uses an MCU you'd have to program correctly even if you built the device).
FWIW, according to another post about that device, even if you had the device, you have to contact Luna to find out what the codes mean (another poster said they don't give out the codes...though if anyone here that has ever gotten an answer from them about a specific code would post that code and the answer here, we could compile a list anyone could access.
)
https://endless-sphere.com/forums/viewtopic.php?f=10&t=89902&start=5750#p1734135
FWIW, according to another post about that device, even if you had the device, you have to contact Luna to find out what the codes mean (another poster said they don't give out the codes...though if anyone here that has ever gotten an answer from them about a specific code would post that code and the answer here, we could compile a list anyone could access.
https://endless-sphere.com/forums/viewtopic.php?f=10&t=89902&start=5750#p1734135