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1. Make sure that you pin 3 is either connected to GND or to the center of a potentiometer (its better using a potetiometer).
2. If you use the potetiometer, you can swing the contrast from full dark to blank screen, this is good sign.
3. After you send the init code, your display contrast will...
Re: LCD 24F hd44780 lcd
If you are trying to place a character at a specific location, you will need the DDRAM mapping for the display. These vary a little by the resolution of the display.
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