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serLCD troubles

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using the example code (modified for hardware serial) with a pcDuino, I could not get the LCD to display desired text, instead the display would be half full of lower case "x" and one or two graphics characters.
Tried different commands and text and display content changes, but still mostly just x's.

Tried resetting the serial to 9600 using the r and now the display backlight turns on for about 1 second and off for about 2 seconds.

Have since tried a lot more commands, but nothing gets displayed and it keeps flashing.

Any suggestions?

Also is the source code and circuit for the serial backpack available?

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