What you will need!

Here is a list with hardware you will need for building the projects as described in the book.

Common H/W for all projects – Must have list:

(At least) One Arduino Board (like the Arduino UNO) or an Arduino-clone like the Seeeduino
A Breadboard and some jumper wires
1K, 10K Ohm and 220Ohm Resistors (1/4 W if they ask you for power at your local h/w store)
Some LEDs
A (mini) USB cable for connecting your Arduino with your computer
Your computer (Mac or PC)

While your Arduino can be powered through your computer’s USB port, it is more convenient to have a separate power source:

Project specific hardware:

An ATMega Microcontroller (either ATMega128 or ATMega328) with Arduino Bootloader installed
A pair of 22 pF ceramic capacitors and one 16 MHz crystal oscillator
One LED (any color of your choice)
One TMP36 temperature sensor
1K, 10K Ohm and 220Ohm Resistors (1/4 W if they ask you for power at your local h/w store)
One Reed switch or a button
A BMP085 senso Barometric Pressure Sensor
A Photoresistor (LDR)
Some projects (like the 2-board communication and the Arduino reprogramming) require a second Arduino board
A Bluetooth serial modem
An Air quality – Gas sensor like the MQ-7 CO sensor
An Android phone
One Seeeduino ADK Main Board
One relay switch
One 2N3904 NPN transistor
One 1N4001 diode
An Arduino Ethernet Shield (WizNet module) or an Ethernet-enabled Arduino
One WiFi Bee from Seeedstudio or the WiFly Shield by Sparkfun
One DHT22 humidity and temperature sensor

Additional H/W for Chapter 11 (Project Ideas):

Building Internet of Things with the Arduino