The Brain Jr has support to get an update on the actual values for the analog inputs using a SYSEX message:
07.06 (7.6) : Request Control Surface Snapshot
F0 00 01 61 0D 07 06 F7
Request values for all Analog inputs. The Brain will re-scan every analog input and report the value with the usual MIDI Channel Message,
Does anyone know if such a command exists to get the digital inputs?