16x2 Serial LCD v2.5

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16x2 Serial LCD v2.5

Post by Inviman » Mon Apr 23, 2018 12:19 am

Hi, I don't really know what happened but when I first connected this LCD screen it showed 16 blank squares in the 1st row, and nothing on the 2nd. I am kind of new to these things, but a little bit of reading suggested its random serial inputs, even if I only wired 5V and GND. Also, the (red) backlight is turned off, but sometimes it does turn on when I power up the screen (like 4 or 5 times out of 100s).
No serial communication works whatsoever, at any baud rate specified by the datasheet (https://www.sparkfun.com/datasheets/LCD/SerLCD_V2_5.PDF)
Did I do something wrong? what can I do to fix it, if possible?
PS. Sorry, the image posted is flipped upside down, my bad.

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