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Topic: [solved] problem lcd 20x4 arduino nano (Read 756 times) previous topic - next topic


Sep 18, 2017, 11:56 am Last Edit: Sep 20, 2017, 09:08 am by ziab
hello; excuse my English
am with this problem since few days ;

the configuration is; 4bit ; arduino nano atmel328p , lcd 20x4 2004A ; the ship is SPLC780D1

2004A datasheet

splc780d1 datasheet

am trying the LiquidCrystal "hello world" example and the result is;
- weird characters
- some times it shows one line on two
- characters are randomly positioned on the screen
-i tried with an other lcd and i had the same problem
- i tried with two different arduinos uno and same problem
- i tried an other code library found on the net with eclipse and same problem
- i tried with 8bit configuration and the same

my questions concern the pins numbering? are all the devices have the same pin numbers? is d12 pin number 12 for example? 

is it possible that the baud rate transfer cause problem? 

well nearly a week trying to make it work; it seems similar to hd44780!!

I attached a picture of the installation

if somebody have an idea of what could be the problem i'll be grateful


with attachment (i hope)


one day break and it worked

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