Help: 635 v1.6 doesn't work but v1.4 does.


New member
I need some help here. I've got a pair of 635 units. One that dates back about a year and a half and one that I just got. Code that works fine on the older unit doesn't work properly on the newer one. For example: I write four full lines with four subsequent command 31's. The first line appears but the others don't. The unit works as per the 635-Wintel tool. So the real question is can you give me (us) a much more detailed explanation of the changes in the firmware?
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USB LCD Displays - Graphic and Character LCDs with a Keypad

CF Tech

The commands take longer to execute in the 1.6 than in the 1.4.

If you wait for acknowledge packets, it should not be an issue. If you are using delays, you will need to make them longer.