I triple checked how I wired lcd to arduino. Also, I used the code from examples:
#include <LiquidCrystal.h>
const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
void setup() {
lcd.begin(16, 2);
lcd.print("hello, world!");
}
void loop() {
lcd.setCursor(0, 1);
lcd.print(millis() / 1000);
}
You may have a bread board with a break in the power rails. You need to jump across the break as shown in this image.
groundFungus:
You may have a bread board with a break in the power rails. You need to jump across the break as shown in this image.
Not "may" but absolutely does. That is exactly what the image shows when viewed at full size.
Thank you 
