This repository contains notes, documentation, and code snippets for the MCT Intro to Arduino Class.
- Arduino in a Nutshell - Jan Borchers' 20-page crash course in Arduino. Great, simple explanations of Arduino features.
- Smraza S32 Starter Kit - Parts kit used in class (does not include Arduino Uno board or USB cable).
- Smraza S32 Tutorial Download - Link to download the source tutorials for the kit used in class.
These are some of the code snippets used in class.
// Pin 13 has an LED connected on most Arduino boards.
int led = 13;
// the setup routine runs once when you press reset:
void setup() {
// initialize the digital pin as an output.
pinMode(led, OUTPUT);
}
// the loop routine repeats forever:
void loop() {
digitalWrite(led, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for a second
digitalWrite(led, LOW); // turn the LED off by making the voltage LOW
delay(1000); // wait for a second
}
int sensorPin = A0; // select the input pin for the potentiometer
int ledPin = 13; // select the pin for the LED
int sensorValue = 0; // variable to store the value coming from the sensor
void setup() {
// declare the ledPin as an OUTPUT:
pinMode(ledPin, OUTPUT);
Serial.begin(9600);
}
void loop() {
// read the value from the sensor:
sensorValue = analogRead(sensorPin);
Serial.println(sensorValue);
// turn the ledPin on
digitalWrite(ledPin, HIGH);
// stop the program for <sensorValue> milliseconds:
delay(sensorValue);
// turn the ledPin off:
digitalWrite(ledPin, LOW);
// stop the program for for <sensorValue> milliseconds:
delay(sensorValue);
}
#include <Stepper.h>
const int stepsPerRevolution = 200; // change this to fit the number of steps per revolution
// for your motor
// initialize the stepper library on pins 2 through 5:
Stepper myStepper(stepsPerRevolution, 2, 3, 4, 5);
int stepCount = 0; // number of steps the motor has taken
void setup() {
// initialize the serial port:
Serial.begin(9600);
}
void loop() {
// step one step:
myStepper.step(1);
Serial.print("steps:");
Serial.println(stepCount);
stepCount++;
delay(500);
}
// --------------------------------------
// i2c_scanner
//
// Version 1
// This program (or code that looks like it)
// can be found in many places.
// For example on the Arduino.cc forum.
// The original author is not know.
// Version 2, Juni 2012, Using Arduino 1.0.1
// Adapted to be as simple as possible by Arduino.cc user Krodal
// Version 3, Feb 26 2013
// V3 by louarnold
// Version 4, March 3, 2013, Using Arduino 1.0.3
// by Arduino.cc user Krodal.
// Changes by louarnold removed.
// Scanning addresses changed from 0...127 to 1...119,
// according to the i2c scanner by Nick Gammon
// http://www.gammon.com.au/forum/?id=10896
// Version 5, March 28, 2013
// As version 4, but address scans now to 127.
// A sensor seems to use address 120.
// Version 6, November 27, 2015.
// Added waiting for the Leonardo serial communication.
//
//
// This sketch tests the standard 7-bit addresses
// Devices with higher bit address might not be seen properly.
//
#include <Wire.h>
void setup()
{
Wire.begin();
Serial.begin(9600);
while (!Serial); // Leonardo: wait for serial monitor
Serial.println("\nI2C Scanner");
}
void loop()
{
byte error, address;
int nDevices;
Serial.println("Scanning...");
nDevices = 0;
for(address = 1; address < 127; address++ )
{
// The i2c_scanner uses the return value of
// the Write.endTransmisstion to see if
// a device did acknowledge to the address.
Wire.beginTransmission(address);
error = Wire.endTransmission();
if (error == 0)
{
Serial.print("I2C device found at address 0x");
if (address<16)
Serial.print("0");
Serial.print(address,HEX);
Serial.println(" !");
nDevices++;
}
else if (error==4)
{
Serial.print("Unknown error at address 0x");
if (address<16)
Serial.print("0");
Serial.println(address,HEX);
}
}
if (nDevices == 0)
Serial.println("No I2C devices found\n");
else
Serial.println("done\n");
delay(5000); // wait 5 seconds for next scan
}
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x3F,16,2);
void setup()
{
lcd.init();
lcd.backlight();
lcd.print("Welcome to");
lcd.setCursor(0,1); //Display position
lcd.print("MakerspaceCT");
}
void loop()
{
// Turn off the display:
lcd.noDisplay();
delay(500);
// Turn on the display:
lcd.display();
delay(500);
}
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);
void setup()
{
lcd.init();
lcd.backlight();
lcd.print("Welcome to");
lcd.setCursor(0,1); //Display position
lcd.print("MakerspaceCT");
delay(1000);
}
void loop()
{
int sensorValue = analogRead(A0);
// Move the cursor back to the beginning to replace existing text
lcd.setCursor(0,0);
lcd.print("Sensor Value:");
// Move the cursor to the second line
lcd.setCursor(0,1);
lcd.print(String(sensorValue) + " ");
delay(500);
}
#include <LiquidCrystal_I2C.h>
#include <dht11.h>
LiquidCrystal_I2C lcd(0x3F,16,2); // set the LCD address to 0x3F for a 16 chars and 2 line display
dht11 DHT; //Note:DHT on behalf of the temperature and humidity sensor
const int dht11_data = 6;
int temp=0;
int hum=0;
void setup()
{
lcd.init(); // initialize the lcd
lcd.backlight();
lcd.print("Welcome to");
lcd.setCursor(0,1);
lcd.print("MakerspaceCT");
delay(2000);
lcd.clear();
}
void loop()
{
DHT.read(dht11_data);
temp=DHT.temperature;
hum=DHT.humidity;
lcd.clear(); //clear display
lcd.print("Hum=%"); //display "Hum=%"
lcd.print(hum);
lcd.setCursor(10,0) ;
lcd.print("MCT"); //display "MCT"
lcd.setCursor(0,1) ; //Display position
lcd.print("Tem="); //display"Temp="
lcd.print(temp);
lcd.write(0xDF); //Display custom characters '°'
lcd.print("C");
delay(500); //After 500ms ,the screen will be refreshed
}