nanoDLP

I have always wondered about a 'Notice' I get when printing....is seems to happen about twice each layer.

EXAMPLE:
Notice    4    2019-05-26 00:40:05.443133    Terminal    Received Data From Controller: echo:Unknown command: ' '

I have tried cleaning up G-code and being sure there are no extra line feeds but I am just guessing at what might generate this....

Seems like a null or blank is being sent to the RAMPS controller in the motion or LED control sequence but I can't seem to track it down....

This doesn't seem to affect my prints and I 'think' it has always been present but maybe I introduced it somewhere along the line when I was first getting started.  Not a big deal but wondering if anyone could tell me what to look at to get rid of the extraneous lines in the log...seems like it should be simple but has me stumped.

I have included a small log sample at the end of this post, in case that helps point at where the 'issue' might be.

Thanks

Debug    4    2019-05-26 00:40:06.572244    Printing    Curing for 60.000002048 seconds
Debug    4    2019-05-26 00:40:06.426914    Shutter    Shutter Open
Warning    4    2019-05-26 00:40:06.426883    Image    Display layer public/plates/155/4.png
Notice    4    2019-05-26 00:40:05.443243    Terminal    Received Data From Controller: ok
Notice    4    2019-05-26 00:40:05.443133    Terminal    Received Data From Controller: echo:Unknown command: ' '
Notice    4    2019-05-26 00:40:05.442816    Terminal    Received Data From Controller: ok
Notice    4    2019-05-26 00:40:05.442684    Terminal    Received Data From Controller: echo:Unknown command: ' '
Debug    4    2019-05-26 00:40:05.426528    Gcode    Delay Printing For 1 Seconds
Debug    4    2019-05-26 00:40:05.426465    Gcode    Transferring Data
Notice    4    2019-05-26 00:40:05.42643    Gcode    Position set to 0.2
Notice    4    2019-05-26 00:40:05.426327    Terminal    Received Data From Controller: Z_move_comp
Debug    4    2019-05-26 00:40:05.426311    Gcode    Transferring Data
Info    4    2019-05-26 00:40:05.426271    Controller Sync    Ready for the next Controller movement
Info    4    2019-05-26 00:40:05.42612    Controller Sync    Done message from Controller has been received
Notice    4    2019-05-26 00:40:02.965632    Terminal    Received Data From Controller: ok
Info    4    2019-05-26 00:40:02.960195    Controller Sync    Waiting for Z_move_comp response from Controller
Debug    4    2019-05-26 00:40:02.960047    Gcode    Transferring Data G1 Z0.2 F200.0000
Notice    3    2019-05-26 00:40:01.974884    Terminal    Received Data From Controller: ok
Notice    3    2019-05-26 00:40:01.974764    Terminal    Received Data From Controller: echo:Unknown command: ' '
Notice    3    2019-05-26 00:40:01.974443    Terminal    Received Data From Controller: ok
Notice    3    2019-05-26 00:40:01.974314    Terminal    Received Data From Controller: echo:Unknown command: ' '
Debug    3    2019-05-26 00:40:01.959404    Gcode    Transferring Data
Notice    3    2019-05-26 00:40:01.959369    Gcode    Position change 6 to 6.15
Notice    3    2019-05-26 00:40:01.959315    Terminal    Received Data From Controller: Z_move_comp
Debug    3    2019-05-26 00:40:01.959231    Gcode    Transferring Data
Info    3    2019-05-26 00:40:01.959187    Controller Sync    Ready for the next Controller movement
Info    3    2019-05-26 00:40:01.959017    Controller Sync    Done message from Controller has been received
Notice    3    2019-05-26 00:39:58.30001    Terminal    Received Data From Controller: ok
Notice    3    2019-05-26 00:39:58.2999    Terminal    Received Data From Controller: ok
Notice    3    2019-05-26 00:39:58.299789    Terminal    Received Data From Controller: echo:Unknown command: ' '
Notice    3    2019-05-26 00:39:58.299479    Terminal    Received Data From Controller: ok
Notice    3    2019-05-26 00:39:58.299356    Terminal    Received Data From Controller: echo:Unknown command: ' '
Info    3    2019-05-26 00:39:58.284485    Controller Sync    Waiting for Z_move_comp response from Controller
Debug    3    2019-05-26 00:39:58.284439    Gcode    Transferring Data

G1 Z6.1500 F50.0000
Debug    3    2019-05-26 00:39:58.284366    Gcode    Transferring Data
Info    3    2019-05-26 00:39:58.28432    Controller Sync    Ready for the next Controller movement
Notice    3    2019-05-26 00:39:58.284228    Terminal    Received Data From Controller: Z_move_comp
Info    3    2019-05-26 00:39:58.283963    Controller Sync    Done message from Controller has been received
Notice    3    2019-05-26 00:39:49.319317    Terminal    Received Data From Controller: ok
Notice    3    2019-05-26 00:39:49.319182    Terminal    Received Data From Controller: ok
Info    3    2019-05-26 00:39:49.307567    Controller Sync    Waiting for Z_move_comp response from Controller
Debug    3    2019-05-26 00:39:49.307463    Gcode    Transferring Data M107
G1 Z3.1500 F20.0000
Debug    3    2019-05-26 00:39:48.796388    Shutter    Shutter Close
Debug    3    2019-05-26 00:39:48.79626    Image    Clear screen