I am a complete beginner, I am taking a micro controllers class as part of my electrical engineering coarse work. I am working on my project for this class but I have run into problems. My project will include a 4 - 7 segment display, a keypad, and a lcd screen. Since I am using the UNO board I will not have enough pins for all of my items. Therefor I purchased the EZ-Expander.
The issue: I can get my LCD screen to work fine if I use non EZ-Expander pins such as A0 - A5 but if I plug my lcd screen into the EZ-Expander I can not get anything to display. All I can get is the back light.
I pulled up the EZ-Expander example and ran that with a led and it worked on every pin (20-35) .
My code is very simple right now as I am just trying to get the lcd display to work on the expander. The code is a build off of the lcd "hello World" example. I am not the greatest coder, so try to use non technical terms.
My Code:
#include <EZExpander.h>
#include <LiquidCrystal.h>
EZExpander expander = EZExpander();
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(28, 29, 30, 31, 32, 33);
void setup() {
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
// Print a message to the LCD.
lcd.print("hello, world!");
}
void loop() {
// set the cursor to column 0, line 1
// (note: line 1 is the second row, since counting begins with 0):
lcd.setCursor(0, 1);
// print the number of seconds since reset:
lcd.print(millis()/1000);
}
pin 28 = rs
pin 29 = enable
pin 30 = d4
pin 31 = d5
pin 32 = d6
pin 33 = d7
Thank you for your time and help.
