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  <div class="section" id="io-4-bricklet">
<span id="io4-bricklet"></span><h1>IO-4 Bricklet<a class="headerlink" href="#io-4-bricklet" title="Permalink to this headline">¶</a></h1>
{% from "macros.html" import tfdocstart, tfdocimg, tfdocend %}
{{
    tfdocstart("Bricklets/bricklet_io4_11_tilted_350.jpg",
               "Bricklets/bricklet_io4_11_tilted_600.jpg",
               "IO-4 Bricklet")
}}
{{
    tfdocimg("Bricklets/bricklet_io4_11_vertical_100.jpg",
             "Bricklets/bricklet_io4_11_vertical_600.jpg",
             "IO-4 Bricklet")
}}
{{
    tfdocimg("Bricklets/bricklet_io4_11_horizontal_100.jpg",
             "Bricklets/bricklet_io4_11_horizontal_600.jpg",
             "IO-4 Bricklet")
}}
{{
    tfdocimg("Bricklets/bricklet_io4_11_master_100.jpg",
             "Bricklets/bricklet_io4_11_master_600.jpg",
             "IO-4 Bricklet with Master Brick")
}}
{{
    tfdocimg("Cases/bricklet_io4_case_100.jpg",
             "Cases/bricklet_io4_case_600.jpg",
             "IO-4 Bricklet in Case")
}}
{{
    tfdocimg("Bricklets/bricklet_io4_brickv_100.jpg",
             "Bricklets/bricklet_io4_brickv.jpg",
             "IO-4 Bricklet in Brick Viewer")
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{{
    tfdocimg("Dimensions/io4_bricklet_dimensions_100.png",
             "Dimensions/io4_bricklet_dimensions_600.png",
             "Outline and drilling plan")
}}
{{ tfdocend() }}<div class="section" id="features">
<h2>Features<a class="headerlink" href="#features" title="Permalink to this headline">¶</a></h2>
<ul class="simple">
<li>4-channel digital input/output</li>
<li>Fixed 3.3V logic voltage</li>
<li>Configurable pull-ups and interrupts</li>
</ul>
</div>
<div class="section" id="description">
<span id="io4-bricklet-description"></span><h2>Description<a class="headerlink" href="#description" title="Permalink to this headline">¶</a></h2>
<p>The IO-4 <a class="reference internal" href="../../Primer.html#primer-bricklets">Bricklet</a> can be used to extend the
features of <a class="reference internal" href="../../Primer.html#primer-bricks">Bricks</a> by external digital inputs
and outputs.</p>
<p>The Bricklet features 4 I/O pins that can be independently configured as
digital inputs or outputs. Each input pin can additionally be configured with
a pull-up or as interrupt source. Via terminal blocks all signals can be accessed.
Two additional terminal blocks deliver 3.3V and GND.</p>
<p>Human interfaces, such as switches, push-buttons and LEDs are typical
applications of this Bricklet.</p>
<p>Hardware version 1.1 adds GND pins nearby the 4 I/O pins to allow easier
access between I/O pins and GND.</p>
</div>
<div class="section" id="technical-specifications">
<h2>Technical Specifications<a class="headerlink" href="#technical-specifications" title="Permalink to this headline">¶</a></h2>
<table border="1" class="docutils">
<colgroup>
<col width="33%" />
<col width="67%" />
</colgroup>
<thead valign="bottom">
<tr class="row-odd"><th class="head">Property</th>
<th class="head">Value</th>
</tr>
</thead>
<tbody valign="top">
<tr class="row-even"><td>I/O Pins</td>
<td>4</td>
</tr>
<tr class="row-odd"><td>Current Consumption</td>
<td>1mA</td>
</tr>
<tr class="row-even"><td>&nbsp;</td>
<td>&nbsp;</td>
</tr>
<tr class="row-odd"><td>I/O Voltages</td>
<td>Fixed 3.3V</td>
</tr>
<tr class="row-even"><td>Maximum Output Current</td>
<td>6mA (per output pin)</td>
</tr>
<tr class="row-odd"><td>Maximum API Calls*</td>
<td><tt class="docutils literal"><span class="pre">set-value</span></tt> (1kHz), <tt class="docutils literal"><span class="pre">get-value</span></tt> (0.5kHz), callbacks (1kHz)</td>
</tr>
<tr class="row-even"><td>&nbsp;</td>
<td>&nbsp;</td>
</tr>
<tr class="row-odd"><td>Dimensions (W x D x H)</td>
<td>35 x 35 x 14mm (1.38 x 1.38 x 0.55&quot;)</td>
</tr>
<tr class="row-even"><td>Weight</td>
<td>14g</td>
</tr>
</tbody>
</table>
<p>* depends on your system (OS, CPU etc.)</p>
</div>
<div class="section" id="resources">
<h2>Resources<a class="headerlink" href="#resources" title="Permalink to this headline">¶</a></h2>
<ul class="simple">
<li>Schematic (<a class="reference external" href="https://github.com/Tinkerforge/io4-bricklet/raw/master/hardware/io-4-schematic.pdf">Download</a>)</li>
<li>Outline and drilling plan (<a class="reference external" href="../../_images/Dimensions/io4_bricklet_dimensions.png">Download</a>)</li>
<li>Source code and design files (<a class="reference external" href="https://github.com/Tinkerforge/io4-bricklet/zipball/master">Download</a>)</li>
</ul>
</div>
<div class="section" id="test-your-io-4-bricklet">
<span id="io4-bricklet-test"></span><h2>Test your IO-4 Bricklet<a class="headerlink" href="#test-your-io-4-bricklet" title="Permalink to this headline">¶</a></h2>
<p>To test a IO-4 Bricklet you need to have <a class="reference internal" href="../../Software/Brickd.html#brickd">Brick Daemon</a> and
<a class="reference internal" href="../../Software/Brickv.html#brickv">Brick Viewer</a> installed. Brick Daemon acts as a proxy between
the USB interface of the Bricks and the API bindings. Brick Viewer connects
to Brick Daemon. It helps to figure out basic information about the connected
Bricks and Bricklets and allows to test them.</p>
<p>Connect the IO-4 Bricklet to a <a class="reference internal" href="../../Primer.html#primer-bricks">Brick</a>
with a Bricklet Cable.
In our test we connected an LED with series resistor to the board
by attaching the anode to pin 3 and the cathode to a GND pin.
Additionally we connected a slide switch that can short pin 0 to GND
(see picture below).</p>
<p>Starting from hardware version 1.1 you can also use the GND pins directly
beside the I/O pins.</p>
<a class="reference external image-reference" href="../../_images/Bricklets/bricklet_io4_master_1200.jpg"><img alt="IO-4 Bricklet connected to Master Brick" class="align-center" src="../../_images/bricklet_io4_master_600.jpg" style="width: 600.0px; height: 400.0px;" /></a>
<p>If you connect the Brick to the PC over USB, you should see a new tab named
&quot;IO-4 Bricklet&quot; in the Brick Viewer after a moment. Select this tab.</p>
<p>If everything went as expected the Brick Viewer should look as
depicted below.</p>
<a class="reference external image-reference" href="../../_images/Bricklets/bricklet_io4_brickv.jpg"><img alt="IO-4 Bricklet in Brick Viewer" class="align-center" src="../../_images/bricklet_io4_brickv.jpg" style="width: 600.0px; height: 394.0px;" /></a>
<p>In this tab you can change the &quot;Debounce Period&quot;,
it is the debounce time for interrupt callbacks.
For example: If you set this value to 100, you will get interrupts
maximal every 100ms. This is necessary if something that bounces is
connected to the IO-4 Bricklet, such as a button. You can test the optimal
value in the Brick Viewer and use it later in your own program.</p>
<p>Below the debounce period configuration you can configure the pins.
Each pin can be configured as input/output and in case of an input pin
as pull-up. The current state is depicted in the table below.</p>
<p>To test the LED we configure pin 3 as output and change the value.
When the pin is high the LED should light up. To test the button
configure pin 0 as input pull-up. We need the pull-up to define a stable
state when the slide switch does not short pin 0 to GND. Now look in the
table, you should see that you can change the value of the pin by toggling
the slide switch.</p>
<p>If you don't have a button or a LED you can try to measure voltages with
a voltage meter or connect an input pin with GND or VCC to see changes in the
Brick Viewer.</p>
<p>After this test you can go on with writing your own application.
See the <a class="reference internal" href="#io4-bricklet-programming-interface">Programming Interface</a>
section for the API of the IO-4 Bricklet and examples in different programming
languages.</p>
</div>
<div class="section" id="case">
<span id="io4-bricklet-case"></span><h2>Case<a class="headerlink" href="#case" title="Permalink to this headline">¶</a></h2>
<p>A <a class="reference external" href="https://www.tinkerforge.com/en/shop/cases/case-io-4-bricklet.html">laser-cut case for the IO-4 Bricklet</a> is available.</p>
<a class="reference external image-reference" href="../../_images/Cases/bricklet_io4_case_1000.jpg"><img alt="Case for IO-4 Bricklet" class="align-center" src="../../_images/bricklet_io4_case_350.jpg" style="width: 341.0px; height: 350.0px;" /></a>
<p>The assembly is easiest if you follow the following steps:</p>
<ul class="simple">
<li>Screw spacers to the Bricklet,</li>
<li>screw bottom plate to bottom spacers,</li>
<li>build up side plates,</li>
<li>plug side plates into bottom plate and</li>
<li>screw top plate to top spacers.</li>
</ul>
<p>Below you can see an exploded assembly drawing of the IO-4 Bricklet case:</p>
<a class="reference external image-reference" href="../../_images/Exploded/io4_exploded.png"><img alt="Exploded assembly drawing for IO-4 Bricklet" class="align-center" src="../../_images/io4_exploded_350.png" style="width: 350.0px; height: 461.0px;" /></a>
<p>Hint: There is a protective film on both sides of the plates,
you have to remove it before assembly.</p>
</div>
<div class="section" id="programming-interface">
<span id="io4-bricklet-programming-interface"></span><h2>Programming Interface<a class="headerlink" href="#programming-interface" title="Permalink to this headline">¶</a></h2>
<p>See <a class="reference internal" href="../../Programming_Interface.html#programming-interface">Programming Interface</a> for a detailed description.</p>
<table border="1" class="docutils">
<colgroup>
<col width="45%" />
<col width="18%" />
<col width="18%" />
<col width="18%" />
</colgroup>
<thead valign="bottom">
<tr class="row-odd"><th class="head">Language</th>
<th class="head">API</th>
<th class="head">Examples</th>
<th class="head">Installation</th>
</tr>
</thead>
<tbody valign="top">
<tr class="row-even"><td>Modbus</td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_Modbus.html#io4-bricklet-modbus-api">API</a></td>
<td>&nbsp;</td>
<td>&nbsp;</td>
</tr>
<tr class="row-odd"><td>TCP/IP</td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_TCPIP.html#io4-bricklet-tcpip-api">API</a></td>
<td>&nbsp;</td>
<td>&nbsp;</td>
</tr>
<tr class="row-even"><td>C/C++</td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_C.html#io4-bricklet-c-api">API</a></td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_C.html#io4-bricklet-c-examples">Examples</a></td>
<td><a class="reference internal" href="../../Software/API_Bindings_C.html#api-bindings-c">Installation</a></td>
</tr>
<tr class="row-odd"><td>C#</td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_CSharp.html#io4-bricklet-csharp-api">API</a></td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_CSharp.html#io4-bricklet-csharp-examples">Examples</a></td>
<td><a class="reference internal" href="../../Software/API_Bindings_CSharp.html#api-bindings-csharp">Installation</a></td>
</tr>
<tr class="row-even"><td>Delphi/Lazarus</td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_Delphi.html#io4-bricklet-delphi-api">API</a></td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_Delphi.html#io4-bricklet-delphi-examples">Examples</a></td>
<td><a class="reference internal" href="../../Software/API_Bindings_Delphi.html#api-bindings-delphi">Installation</a></td>
</tr>
<tr class="row-odd"><td>Java</td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_Java.html#io4-bricklet-java-api">API</a></td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_Java.html#io4-bricklet-java-examples">Examples</a></td>
<td><a class="reference internal" href="../../Software/API_Bindings_Java.html#api-bindings-java">Installation</a></td>
</tr>
<tr class="row-even"><td>JavaScript</td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_JavaScript.html#io4-bricklet-javascript-api">API</a></td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_JavaScript.html#io4-bricklet-javascript-examples">Examples</a></td>
<td><a class="reference internal" href="../../Software/API_Bindings_JavaScript.html#api-bindings-javascript">Installation</a></td>
</tr>
<tr class="row-odd"><td>LabVIEW</td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_LabVIEW.html#io4-bricklet-labview-api">API</a></td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_LabVIEW.html#io4-bricklet-labview-examples">Examples</a></td>
<td><a class="reference internal" href="../../Software/API_Bindings_LabVIEW.html#api-bindings-labview">Installation</a></td>
</tr>
<tr class="row-even"><td>Mathematica</td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_Mathematica.html#io4-bricklet-mathematica-api">API</a></td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_Mathematica.html#io4-bricklet-mathematica-examples">Examples</a></td>
<td><a class="reference internal" href="../../Software/API_Bindings_Mathematica.html#api-bindings-mathematica">Installation</a></td>
</tr>
<tr class="row-odd"><td>MATLAB/Octave</td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_MATLAB.html#io4-bricklet-matlab-api">API</a></td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_MATLAB.html#io4-bricklet-matlab-examples">Examples</a></td>
<td><a class="reference internal" href="../../Software/API_Bindings_MATLAB.html#api-bindings-matlab">Installation</a></td>
</tr>
<tr class="row-even"><td>Perl</td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_Perl.html#io4-bricklet-perl-api">API</a></td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_Perl.html#io4-bricklet-perl-examples">Examples</a></td>
<td><a class="reference internal" href="../../Software/API_Bindings_Perl.html#api-bindings-perl">Installation</a></td>
</tr>
<tr class="row-odd"><td>PHP</td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_PHP.html#io4-bricklet-php-api">API</a></td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_PHP.html#io4-bricklet-php-examples">Examples</a></td>
<td><a class="reference internal" href="../../Software/API_Bindings_PHP.html#api-bindings-php">Installation</a></td>
</tr>
<tr class="row-even"><td>Python</td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_Python.html#io4-bricklet-python-api">API</a></td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_Python.html#io4-bricklet-python-examples">Examples</a></td>
<td><a class="reference internal" href="../../Software/API_Bindings_Python.html#api-bindings-python">Installation</a></td>
</tr>
<tr class="row-odd"><td>Ruby</td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_Ruby.html#io4-bricklet-ruby-api">API</a></td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_Ruby.html#io4-bricklet-ruby-examples">Examples</a></td>
<td><a class="reference internal" href="../../Software/API_Bindings_Ruby.html#api-bindings-ruby">Installation</a></td>
</tr>
<tr class="row-even"><td>Shell</td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_Shell.html#io4-bricklet-shell-api">API</a></td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_Shell.html#io4-bricklet-shell-examples">Examples</a></td>
<td><a class="reference internal" href="../../Software/API_Bindings_Shell.html#api-bindings-shell">Installation</a></td>
</tr>
<tr class="row-odd"><td>Visual Basic .NET</td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_VBNET.html#io4-bricklet-vbnet-api">API</a></td>
<td><a class="reference internal" href="../../Software/Bricklets/IO4_Bricklet_VBNET.html#io4-bricklet-vbnet-examples">Examples</a></td>
<td><a class="reference internal" href="../../Software/API_Bindings_VBNET.html#api-bindings-vbnet">Installation</a></td>
</tr>
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