Hi jetro57070, Thank you for posting on the forum. The MOP series does not have software controlled contrast. If you go to our website (www.matrixorbital.com). The Parallel (MOP) series is one of the few series that does not have software controlled contrast. The pot in the datasheet is suggested so...

Hi, But let me ask one other question. Is there a version of the GLK and GLC that don't require RS-232 input? I mean is there a parallel version? We only offer the GLK in RS232 / TTL and I2C protocols. If you are interested in parallel displays, please see the following: http://www.matrixorbital.com...

Hi ipscone, Now we know that there are extra characters sent by BASIC. And more so, it is sending ESC characters that are fortunately understood by Hyperterminal and the other LCD modules that you've tried. Unfortunately, as I've mentioned, the only control character we implement is 0x0A. This is th...

Hi ipscone, Yes, I understand where you're coming from. I just have not seen the GLK24064-25 act this way and the only way it would, is if it was told to display such characters. Thank you for trying this out for me, hopefully we can understand more what's happening when we see the result of this te...

Hi, Although the GLK24064-25 is not included in the list of series that uProject can work with, uProject can difinitely be used with the GLK. In the small task that I was talking about though, you will not be connecting the GLK24064-25 at all. It'll only be involving BASIC and uProject running at a ...

Hi, I wonder if you can please try something out for me? Would you happen to have uProject (MO software) or any terminal emulator that is capable of transmitting and receiving non-ASCII characters? What would be nice is to see what ENTER is actually sending down the line. If you can please connect y...

Hi, No, >R<>>R>, does not ring any bells. Besides, one would think that ENTER would probably be sending something like 0x0D 0x0A, which might display characters if these values hold a specific glyph. If not, the only control character that the GLK24064-25 implements is 0x0A which is new line. You me...

Hi,

Can you please query the module for its version number? Use command
254 / 54.

Hi Erv,

I am glad to hear that things are now better. Have a good night, or whatever's left of the night.

Hi Erv, Okay, let's go back a bit. The picture you sent has the 2 solder jumps jumpered, it also has the two traces severed. When a board is such, it is configured in TTL. Unless otherwise requested TTL level settings, the board should be in RS232 level settings when it leaves the factory, which mea...

Hi Erv, I am posting a picture of how to get the LK204-25 PCB 1.23 to TTL levels, and as I see it, yours is at TTL levels. To get the board to RS232 levels, undo the comments, ie. Connect the two traces that you can see obviously severed in your board, and unsolder the solder jumps that are soldered...

Sorry, Erv, but I do not see any picture.

Is it possible for you to post a picture of your module? What is the PCB rev?

Hi erv,

A suggestion, please make sure that your board is set to RS232 when you try and communicate with it via RS232.

Try hyperterminal or our own uProject to communicate with the module.

Hello Mensch, If I understand you right, most of your modules are now working but you have 2 boards that you can connect to but keypad does not work; and another board that you can not even open a connection. First thing to do is please do a visual inspection of the boards. Compare all of the 3 prob...