Arduino first steps

Revision as of 15:12, 24 November 2014 by Alexanderg (Talk | contribs)

Jump to: navigation, search

If you have never worked with Arduino before, this page describes how to start with your Arduino that you can purchase via the shop Shopping.png.

All you need to 'upload' the example code to your Arduino is:

  • One Arduino Nano (or Arduino Mega2560)
  • One USB cable
Arduino nano usb cable.jpg

1. Attach the Arduino to your computer

Using an USB cable, attach the Arduino (Arduino Nano or Arduino Mega) to your computer as shown below.

2. Download

Click here to download the Arduino development software (v1.5.8) to your computer 
(Windows users should download the 'Installer' version on that page):
Arduino symbol small.jpg  

3. Install

After the download completed, install the Arduino development software on your computer:
For Windows users, double click the downloaded file ('arduino-1.5.8-windows.exe') in your
Windows file explorer to run the installation.

4. Run

After the installation completed, run the Arduino development software on your computer 
by double clicking the 'Arduino' symbol on your Windows desktop.
Arduino start symbol small.jpg

5. Choose blink example

After the Arduino development software has started, choose the menu, 
and click on 'File->Examples->Basics->Blink'. This will load the Arduino blink example.
Arduino ide blink example.jpg

6. Choose correct board type

Via the menu, click on 'Tools->Board->Arduino Nano' to choose your Nano board 
(or Arduino Mega 2560 if you want to use a Mega board). 
Arduino ide choose board.jpg

7. Choose correct USB serial port

Via the menu, click on 'Tools->Port', and choose the detected USB serial port.
Arduino ide choose port.jpg

8. Upload the blink example

Click on the 'Upload' symbol to upload the blink example to your Arduino. 
After the upload completed, your Arduino will start to blink!
Arduino ide upload.jpg

After the code is uploaded, your Arduino will start to blink:
Arduino nano blink example.gif


You have just programmed your first Arduino!

Now let's look a little bit closer at the above blink code to understand it:

The Arduino has several pins, each of them has a number.  As you can see, Pin 13 is already connected to the on-board LED:
Arduino nano pinout.jpg
Each pin can be configured as either INPUT or OUTPUT depending on wheter you want 
to measure or control that pin : 
 INPUT   means that you can read (or measure) that pin. The measurement can be either ON 
 (there is voltage on that pin)  or OFF (there is no voltage on that pin).
 OUTPUT   means that you can write (or control) the voltage of that pin.
In the blink example above, we are using the LED pin (pin 13) that is already connected to an LED. 
Because we want to control that pin, we are configuring it as OUTPUT: 
 pinMode(13, OUTPUT);

Now let's see how we can turn ON or OFF the LED using an Arduino command. This command will turn ON the voltage for pin 13:
 digitalWrite(13, HIGH);
And consequently this command will turn OFF the voltage for pin 13:
 digitalWrite(13, LOW);
Let's see how we can wait one second between the ON and OFF toggling. This command will wait (halt) 
the program for one second (=1000 milliseconds):

So let's look at the complete blink program again:
 void setup(){
   pinMode(13, OUTPUT);      // we want to control pin 13 

 void loop(){
   digitalWrite(13, HIGH);   // pin 13 will go HIGH (voltage ON)
   delay(1000);              // wait one second (=1000 milliseconds)
   digitalWrite(13, LOW);    // pin 13 wil go LOW (voltage OFF)
   delay(1000);              // wait one second (=1000 milliseconds)
   // everything repeats                           

How to go further...

Now you can try to upload the Ardumower code the same way as you uploaded the blink example!