Yes, but even with that example, I can't seem to get it to change the message on the screen!

Any ideas of what might be going on here?


Could it be a hardware fault with the LED display?

 

message = "U";
would not do anything because the LED display would reject it as an invalid command.
I have not yet located the complete command list. This is not the complete user manual.

 

I have not been able to find any further documentation on the Magnetic North QL010 LED display.
If we can assume that the example shown above is a valid command, then we can try sending it.

disp 'Serial Port Test'
s = serialport("COM7", 38400);
data = [0xBB 0x11 0x00 0x1D 0x03 0xDA 0x8B 0xC5 0x6B 0x17 0x53 0x27 0x59 0x57 0x88 ...
    0xD9 0x7A 0x28 0x00 0x4D 0x00 0x29 0x00 0x30 0x52 0x86 0x4E 0xFF 0xD5 0x08 0x55];
write(s, data, "int8");
delete(s);

 

Mmm I had a go with that, but it still seems to not update the code.

I'll try to get some more documentation and information for the display!