Hardware Reference
In-Depth Information
Arduino WiFi Shield
The Arduino WiFi Shield includes an HDG104 Wireless LAN controller, enabling
an Arduino to access 802.11b/g networks. It can connect to open and encrypted
networks. This module also includes a micro-SD slot for data-logging.
Arduino GSM Shield
The Arduino GSM shield connects to the Internet through a GPRS network, at
a maximum of 85.6 KBps. It also has voice capabilities; by adding an external
microphone and speaker circuit, it can make and receive voice calls. It can also
send and receive SMS messages. The modem, an M10 by Quectel, is coni gured
using AT commands, handled in software by the GSM library.
The Arduino GSM Shield comes with a Bluevia SIM card; which allows
for machine-to-machine roaming data connections in blocks of 10 or 20
megabytes. However, the GSM shield will work with a SIM card from a dif-
ferent provider.
Your Own Shield
In some cases, you will want to make your own electronics. For prototyping, a
breadboard is sufi cient, but when you need something more robust and more
professional, it is time to make your own shield. There are several software
options to assist you, but one of the best is the Fritzing application. In Fritzing,
you can create breadboard designs, translate them into electronic schematics,
and generate a shield layout directly. Fritzing also has its own shield creation
system; just upload your schematic to its website and receive a professionally
built shield.
What Can You Do with an Arduino?
This is one of the most commonly asked questions, but the answer is both simple
and complicated. Put simply, you can do almost anything you can imagine. The
most difi cult part of any Arduino project is identifying a need. Maybe you
have an aquarium at home and would like to control the lighting in a specii c
way? Maybe you would like to add a parking assist device onto your car. Some
people just want to add some automation to their house, opening and closing
motorized shades at the push of a button. Some people come up with even
more amazing and fun projects: a remote-controlled lawn mower, even a chess
playing robot. The possibilities are almost unlimited. There are a few things
that an Arduino cannot do, but that list is becoming shorter every time a new
Arduino-compatible board is released.
 
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