Problem connecting LCD to Arduino Ethernet

Projects Programming
1

Hi,

I'm trying to connect LCD (LCM1602c that comes with starter kit) to Arduino Ethernet with serial2USB modul but no luck for 2 straight days.

Could anyone suggest what could be wrong because I'm running out of ideas.

Here is the code:

#include <LiquidCrystal.h>
LiquidCrystal lcd(3, 2, 7, 6, 5, 4);

void setup(){  
  lcd.begin(16,2);
  lcd.print("Hello world");
}

void loop(){}

and picture of wiring can be found in attach.

photo1.jpg
photo1.jpg834×741 108 KB

2

You have the Contrast pin (#3) connected to VCC (+5V). That will drive the contrast to one of the extremes.

To adjust contrast, put a 10K pot across +5 and Gnd and use the wiper of that to drive pin 3 (Contrast).

3

So you mean that text might be printed out but I'm not able to see it due to extreme contrast?

4

justRadojko:
So you mean that text might be printed out but I'm not able to see it due to extreme contrast?

Yes.