Raspberry Pi 8110714 Handleiding

Raspberry Pi Niet gecategoriseerd 8110714

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Bringing Cellular Networking Connectivity to Raspberry Pi and Arduino
Posted by on Wed, Feb 26 2014 Designspark Magazine
SparqEE is a California-based company that has
come up with the concept of a tiny cellular
development board that provides the opportunity
to developers to add worldwide wireless
coverag . Initially launched back in August via e
the Kickstarter crowd-funding programme, the
CELLv1.0 enables worldwide wireless Internet
access for projects using Arduino and Raspberry
Pi platforms. Although Bluetooth and WIFI offer
high-speed data transfer, relatively speaking,
there are clear limitations in terms of distance, operating over a few meters or a few
tens of metres; whereas cellular enables significantly greater range and is ideal for
‘small data’ projects that need to operate over distances such as a few streets or a
town or even a country away.
Measuring only 36 x 42 x 7mm, the CELLv1.0 is currently the smallest, least
expensive and easiest to-use cellular module on the market for popular development
platforms. The device uses 2G/3G technology, meaning that it will primarily use 3G
worldwide and will only employ 2G where 3G connectivity is unavailable. Clearly, a
SIM card is required to communicate over a cellular network and the CELLv1.0
allows any SIM to be used, such as that from a mobile phone or a pre-paid SIM.
However,SparqEE can also provide low-cost SIM cards via its website that works
pretty much anywhere in the world.
Applications
The increase in range permitted by cellular communications enables a number of
potential applications for developers. Given bandwidth constraints versus say WIFI
or Bluetooth, suitable project are more likely to be sensor-based low-
bandwidth-data projects that will send low amounts of data over the Internet.
Connected to the developer’s favourite development board such as the Raspberry Pi
or Arduino, example projects could be relatively simple ones like remote help
devices to open a door,turn on a light or the power for an air-conditioning unit or
setting an alarm in a remote office. Another project could be creating a vehicle
tracker that allows car owners to know where their vehicle is directly from any
smartphone or computer, or possibly even adding a ‘kill switch’ in case the vehicle is
stolen. The same basic idea could be applicable to making a tracking device for a
dog or another pet. More ambitious and grander projects could include flying a small
solar-powered remote-control helicopter across town with a camera to make aerial
movies and shoot cityscape pictures; or using remote sensor networks to provide
early warning systems by monitoring bridge harmonics for evidence of impending
danger, or heat signatures in a forest for fires, or sea levels off the coast looking for
floods or tsunamis.
Making Cellular Easy
As there are many potential stumbling blocks in cellular technology for developers to
consider, the company provides help along every step of the way to easily get data
from a device. For example, as cellular connectivity via the CELLv1.0 is over the
Internet, data servers will need to be set up. Developers can of course set up their
own servers to use the CELLv1.0, but very helpfully SparqEE is also providing freely
available servers via a standard RESTful implementation and also provides
examplesfor enabling this feature. All this enables users to easily get data from a
device, through the cloud, and back out to a computer, smartphone or any Internet
enabled device, see figure 1. A completely open-source project, also included in the
CELLv1.0 package by SparqEE along with the board, antenna and power cable are
open-source development aids including code, schematics, PCB files including
EAGLE and DesignSpark PCB formats, design files, examples,pictures and other
useful facilities. SparqEE also provide a forum on its website at www.sparqee.com
dedicated to projects from developers.
Originally, when launched via Kickstarter, the CELLv1.0 was a two-piece design
consisting of a cellular and a breakout/jumper board. However, the new design is a
single-board design, shown in Figure 2, which has been simplified to a USB cable to
supply the power and using the appropriate Arduino or Raspberry Pi shield. In the
move to the single-board design, all that was required essentially was four
connection wires:TX, RX, ground (GND) and voltage reference (Vref),allowing usage
of either a 3.3 or 5V system.
CELLv1.0 Specifications
Electrical specifications of the CELLv1.0 cellular module include: input voltage of 3.7
to 5V, powered via USB cable or via the header pins; current draw of less than 5mA
in standby, less than 75mA (average,w/o services), less than 500mA (average)and
2.3A maximum.
Connectivity specifications are:
WCDMA/HSDPA 2100/1900/900MHz, delivering 384Kbps or DL3.6Mbps HSDPA;
GSM/GPRS/EDGE 850/900/1800/1900MHz;serial Interface (UART, any voltage
such as 3.3V or 5V)and USB 2.0 interface (power, USART, and modem). And finally,
Windows, Linux, and Android drivers are available.
The SparqEE is available exclusively from RS Components.
Read this Blog Post on DesignSpark
More about Raspberry Pi in the DesignSpark Raspberry Pi Design Centre
More about Arduino in the DesignSpark Arduino Design Centre

Product specificaties

Merk: Raspberry Pi
Categorie: Niet gecategoriseerd
Model: 8110714
Breedte: 56 mm
Diepte: 85 mm
Compatibiliteit: Raspberry Pi
Type product: Netwerkmodule

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