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Olimex Support Forum

DUINO => SHIELDS => Topic started by: m_k_johnson on March 19, 2015, 06:01:54 PM

Title: SHIELD-LCD16x2 I2C working, LCD not displaying.
Post by: m_k_johnson on March 19, 2015, 06:01:54 PM
Hello,
I hook up the SHIELD-LCD16x2 to an Arduino. 
Running example Buttons_And_LCD:

- lcd.readButtons() works = so I2C is working. 
- lcd.lcdWrite() does not show anything on LCD.

Note: the LCD display is not lit.  Should it be?  The SHIELD-LCD16x2 is plugged into 3.3V/GND of Arduino.

Any thoughts on debugging is much appreciated.
Thank you.
Title: Re: SHIELD-LCD16x2 I2C working, LCD not displaying.
Post by: Stanimir5F on May 11, 2015, 03:58:02 PM
You said that 3.3V and GND are plugged. How about the 5V line?

Because as you described it it looks like the 5V isn't. I can't guarantee you that exactly this is the problem you have encountered, but if 5V aren't presented the LCD won't work for sure.

Stanimir, Olimex
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