LCD1602 on pins 4, 6 and 10 to 13, on an Arduino Uno

// A 16x2 LCD on pins 4, 6 and 10 to 13.
//
//   LCD RS -> pin 4    LCD E -> pin 6
//   LCD D4 -> pin 10   D5 -> pin 11   D6 -> pin 12   D7 -> pin 13
//   LCD RW, VSS, K -> GND     VDD, A -> 5V
//   LCD V0 (contrast) -> GND here; on the bench, the middle leg of a pot
//
// LiquidCrystal's constructor takes RS, E, D4, D5, D6 and D7, in that order.
// The top line shows a fixed greeting; the second line scrolls a message
// across one character at a time by printing it from a moving start column.

#include <LiquidCrystal.h>

LiquidCrystal lcd(4, 6, 10, 11, 12, 13);

const char MESSAGE[] = "Hello from the Uno!   ";
int start = 0;

void setup() {
  lcd.begin(16, 2);
  lcd.print("Mokxi LCD1602");
  Serial.begin(9600);
  Serial.println("Mokxi Uno: LCD1602 on pins 4, 6 and 10 to 13");
}

void loop() {
  int length = sizeof(MESSAGE) - 1;
  lcd.setCursor(0, 1);
  for (int i = 0; i < 16; i++) lcd.print(MESSAGE[(start + i) % length]);
  start = (start + 1) % length;
  delay(300);
}