Introduction of Arduino in IoT

Features of Arduino

• Open source based electronic programmable board (micro controller) and software (IDE)
• Accepts analog and digital signal as input and gives desired output
• No extra hardware required to load a program into the controller board

Types of Arduino Board

• Arduino boards based on ATMEGA328 microcontroller
• Arduino boards based on ATMEGA32u4 microcontroller
• Arduino boards based on ATMEGA2560 microcontroller
• Arduino boards based on AT91SAM3X8E microcontroller

Arduino UNO

Board Details

• Power supply : USB or power barrel jack
• Voltage Regulator
• LED Power Indicator
• Tx-Rx LED Indicator
• Output power, Ground
• Analog Input Pins
• Digital I/O Pins

Arduino IDE

• Arduino IDE is an open source software that is used to program the Arduino controller board
• Based on variations of the C and C++ programming language
• It can be downloaded from Arduino's official website and installed into PC

Set Up

• Power the board by connecting it to a PC via USB cable
• Launch the Arduino IDE
• Set the board type and the port for the board
• TOOLS -> BOARD -> select your board
• TOOLS -> PORT -> select your port

Arduino IDE Overview

Program coded in Arduino IDE is called a SKETCH

• Verify : Checks the code for compilation errors
• Upload : Uploads the final code to the controller board
• New : Creates a new blank sketch with basic structure
• Open : Opens an existing sketch
• Save : Saves the current sketch

Sketch Structure

• A sketch can be divided into two parts :

       - Setup ( )
       - Loop ( )

• The function setup( ) is the point where the code starts , just like the main ( ) function in C and C++
• I/O Variables, pin modes are initialized in the Setup( ) function
• Loop( ) function, as the name suggests, iterates the specified task in the program

Supported Datatype

• Arduino supports the following data types -

       void           Long
       Int              Char
       Boolean     Unsigned char
       Byte           Unsigned int
       Word          Unsigned long
       Float          Double
       Array         String-char array
       String-object     Short

Arduino Function Libraries


Input/Output Functions :

• The Arduino pins can be configured to act as input or output pins using the pinMode( ) function

                    Void setup ( )

                         { 

                          pinMode (pin , mode);

large;">                           }

Pin-pin number on the Arduino board

Mode - INPUT/OUTPUT

For Example, See Video ------