nanoDLP

This is what I see once the print is initiated:

Notice    1    2016-11-26 00:42:13.967548    Projector    Projector on
Debug    1    2016-11-26 00:42:13.967409    Shutter    Shutter Close
Debug    1    2016-11-26 00:42:13.96729    Image    Clear screen
Notice    0    2016-11-26 00:42:13.94763    Projector    Projector on

And after a while, there is a fault (there is lot more in the output, this is just the tail end of it):

goroutine 69621 [runnable]:
syscall.Syscall(0x6, 0x11, 0x0, 0x0, 0x0, 0x0, 0x0)
    /usr/local/go/src/syscall/asm_linux_arm.s:17 +0x8
syscall.Close(0x11, 0x0, 0x0)
    /usr/local/go/src/syscall/zsyscall_linux_arm.go:296 +0x44
os.(*file).close(0x10c498b0, 0x0, 0x0)
    /usr/local/go/src/os/file_unix.go:140 +0x54
os.(*File).Close(0x10b6e3f8, 0x0, 0x0)
    /usr/local/go/src/os/file_unix.go:132 +0x54
io/ioutil.WriteFile(0x4d8d60, 0x12, 0x10c8d7a0, 0xd1, 0x103, 0x1b6, 0x0, 0x0)
    /usr/local/go/src/io/ioutil/ioutil.go:85 +0xdc
main.jsonSave(0x4d8d60, 0x12, 0x4bed70, 0x6929b0)
    /home/pi/printer/app/db.go:543 +0x20c
main.(*StatusStruct).Save(0x6929b0)
    /home/pi/printer/app/db.go:471 +0x64
created by main.setLayer
    /home/pi/printer/app/printing.go:243 +0x9c

trap    0x6
error   0x0
oldmask 0x0
r0      0x0
r1      0x58e
r2      0x6
r3      0x0
r4      0x76d54094
r5      0x76a49460
r6      0x0
r7      0x10c
r8      0x1
r9      0x76baa6d0
r10     0x109005a0
fp      0x674948
ip      0x76a49920
sp      0x76a48a88
lr      0x76c43f44
pc      0x76c43f70
cpsr    0x20000010
fault   0x0

I changed the printer profile to one of predefined and also removed Waitfordonemessage from gcode. That has done the trick. I had noticed that the ramps sync module was not able to recognize the ok messages from grbl. I am now able to simulate the entire print job.