Arduino Set Up and Arduino Inputs & Outputs Part I

In class this week, we learned how to code the basic “Blink” in Arduino and connect it to the breadboard. I used to do this, but it was a long time ago, so it’s good to try the “Hello World!” of Arduino once again.

(I didn’t get a chance to take pictures and document the process in class, so I redo it at home.)

Code:

int ledPin  = 12;

void setup() {
  pinMode(ledPin, OUTPUT);
}

void loop() {
  digitalWrite(ledPin, HIGH);
  delay(1000);
  digitalWrite(ledPin, LOW);
  delay(1000);
}

C++

For the Inputs and Outputs assignment, I created a distance reader from a distance sensor (input) and an LCD display (output).

Code:

#include <LiquidCrystal_I2C.h>
#include <Wire.h>
#include <NewPing.h>

#define ECHO_PIN 12
#define TRIG_PIN 13
#define MAX_DIST 3000

int contrast = 100;

NewPing sonar(TRIG_PIN, ECHO_PIN, MAX_DIST);
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  lcd.begin();
  lcd.backlight();
	lcd.clear();
	lcd.setCursor(4,0);
  pinMode(2, OUTPUT);
  analogWrite(2, contrast);
}

void loop() {
  unsigned int uS1 = sonar.ping_in();
  unsigned int uS2 = sonar.ping_cm();
  lcd.clear();
  lcd.setCursor(2,0);
  lcd.print("Ping: ");
  lcd.print(uS2);
  lcd.print(" cm");
  lcd.setCursor(2,1);
  lcd.print("Ping: ");
  lcd.print(uS1);
  lcd.print(" in");
  lcd.setCursor(1,0);
  delay(1000);
}

C++