thomas
/
website


			
				
					
						
						
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153
							<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title>Bluetooth UART (BTM-222) - xythobuz.de</title>
    <meta name="description" content="PCB for the BTM-222 and 5V level converters" />
    <meta name="keywords" content="xythobuz" />
    <link rel="author" href="/xythobuz@xythobuz.de">
    <link rel="shortcut icon" href="/img/favicon.ico">
    <script type="text/javascript" src="/js/sh_main.js"></script>
    <link type="text/css" rel="stylesheet" href="/css/sh_bright.min.css" />
    <link rel="stylesheet" href="/css/style.css" type="text/css" media="screen" />
    <link rel="alternate" type="application/rss+xml" title="Blog" href="/rss.xml">
    <link rel="stylesheet" href="/css/gh-fork-ribbon.css" />
    <link href='http://fonts.googleapis.com/css?family=Droid+Sans:400,700' rel='stylesheet' type='text/css'>
    <script type='text/javascript'>
/* <![CDATA[ */
(function() {
var s = document.createElement('script');
var t = document.getElementsByTagName('script')[0];
s.type = 'text/javascript';
s.async = true;
s.src = '//api.flattr.com/js/0.6/load.js?mode=auto&uid=xythobuz&category=text';
t.parentNode.insertBefore(s, t);
})();
/* ]]> */
</script>
</head>
<body onload="sh_highlightDocument('/js/sh/', '.min.js');">
    
    <div id="header">
        <h1>xythobuz.de</h1>
        <h2>Bluetooth UART (BTM-222)</h2>
    </div>
    <div id="lang"><span id="lang2">Translation: 
<a href='bluetooth.de.html'>de</a> | <a href='bluetooth.html'>en</a>
</span></div>
    <div class="colmask leftmenu"><div class="colleft">
        <div class="content">

            <div id="flattr">
<a class="FlattrButton" href="http://www.xythobuz.de/bluetooth.html" title="Bluetooth UART (BTM-222)">PCB for the BTM-222 and 5V level converters</a>
</div>
<div id="twitter">
<a href="https://twitter.com/share" class="twitter-share-button" data-via="xythobuz" data-dnt="true" data-related="xythobuz" data-count="vertical">Tweet</a><script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src="//platform.twitter.com/widgets.js";fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs");</script>
</div>
<div id="reddit">
<script type="text/javascript">reddit_url = "http://www.xythobuz.de/bluetooth.html";</script>
<script type="text/javascript" src="http://www.reddit.com/static/button/button2.js"></script>
</div>

            <h1>Bluetooth UART (BTM-222)</h1>
<p>Here's the Layout of a BTM-222 Bluetooth PCB, following the <a href="http://www.rn-wissen.de/index.php/RN-Definitionen">Roboternetz Guidelines Mini Format</a>. The circuit comes from <a href="http://www.robotfreak.de/blog/mikrocontroller/preiswerte-bluetooth-anbindung/44">Robotfreak</a>, but is basically the minimal circuit described in the <a href="/files/btm222.pdf">datasheet (370kB)</a>.</p>
<p><a href="/img/BT_Top.jpg"><img alt="PCB Top" src="/img/BT_Top_small.jpg" /></a>
<a href="/img/BT_Bot.jpg"><img alt="PCB Bottom" src="/img/BT_Bot_small.jpg" /></a>
<a href="/img/bt_plan.png"><img alt="Circuit diagram" src="/img/bt_plan_small.png" /></a>
<a href="/img/BT_Layout.png"><img alt="Layout" src="/img/BT_Layout_small.png" /></a></p>
<p><a href="/files/bluetooth.zip">Layout and Circuit Diagram as Eagle files (54kB)</a>.</p>
<table border="1">
  <tr><th>ID</th><th>Value</th><th>Shop</th></tr>
  <tr><td>R1</td><td>200k Ohm</td><td>-</td></tr>
  <tr><td>R2</td><td>5k Ohm Poti</td><td><a href="http://www.conrad.de/ce/de/product/430722/">Conrad</a></td></tr>
  <tr><td>R3 - R10</td><td>1k Ohm</td><td>-</td></tr>
  <tr><td>Q1 - Q4</td><td>BC547 NPN</td><td><a href="http://www.conrad.de/ce/de/product/155012/">Conrad</a></td></tr>
  <tr><td>IC1</td><td>LM317(LZ)</td><td><a href="http://www.conrad.de/ce/de/product/155585/">Conrad</a></td></tr>
  <tr><td>IC2</td><td>BTM 222</td><td><a href="http://shop.ulrichradig.de/aktive-Bauelemente/Module/Bluetooth-Module-BTM222.html">Ulrich Radig</a></td></tr>
  <tr><td>LED 1+2</td><td>LED 5mm</td><td>-</td></tr>
</table>

<p>Soldering the standard parts should be no problem. You should use a find soldering iron to connect each pin of the BTM-222, one after another. A 31mm long piece of wire can be used as antenna.</p>
<h2>Interfacing the BTM-222</h2>
<p>Before using the BTM-222 you have to configure it. You can change the speed, data format, name, PIN and some other things. You have to connect the hardware serial interface of the BTM-222 to a PC and issue the AT-Commands documented in the datasheet. It is very important to use only '\r' as Line-End-Character. Using '\n' or "\r\n" will result in error messages from the module.</p>

        <script>var pfHeaderImgUrl = '';var pfHeaderTagline = '';var pfdisableClickToDel = 0;var pfHideImages = 0;var pfImageDisplayStyle = 'right';var pfDisablePDF = 0;var pfDisableEmail = 0;var pfDisablePrint = 0;var pfCustomCSS = '';var pfBtVersion='1';(function(){var js, pf;pf = document.createElement('script');pf.type = 'text/javascript';if('https:' == document.location.protocol){js='https://pf-cdn.printfriendly.com/ssl/main.js'}else{js='http://cdn.printfriendly.com/printfriendly.js'}pf.src=js;document.getElementsByTagName('head')[0].appendChild(pf)})();</script><a href="http://www.printfriendly.com" style="color:#6D9F00;text-decoration:none;" class="printfriendly" onclick="window.print();return false;" title="Printer Friendly and PDF"><img style="border:none;margin:0 6px"  src="https://pf-cdn.printfriendly.com/images/icons/pf-print-icon.gif" width="16" height="15" alt="Print Friendly Version of this page" />Print <img style="border:none;margin:0 6px"  src="https://pf-cdn.printfriendly.com/images/icons/pf-pdf-icon.gif" width="12" height="12" alt="Get a PDF version of this webpage" />PDF</a>
<div id="disqus_thread"></div>
<script type="text/javascript">
var disqus_shortname = "xythobuz";
(function() {
var dsq = document.createElement("script"); dsq.type = "text/javascript"; dsq.async = true;
dsq.src = "http://" + disqus_shortname + ".disqus.com/embed.js";
(document.getElementsByTagName("head")[0] || document.getElementsByTagName("body")[0]).appendChild(dsq);
})();
</script>
<noscript>Please enable JavaScript to view the <a href="http://disqus.com/?ref_noscript">comments powered by Disqus.</a></noscript>
<a href="http://disqus.com" class="dsq-brlink">comments powered by <span class="logo-disqus">Disqus</span></a>

        </div>
        <div class="nav">
            <h3>Thomas Buck</h3>

            <div id="logo"><img id="logoImg" src="http://www.gravatar.com/avatar/8d18fec40a74782052fb4c007d212475?s=180" alt="Avatar"></div>

            <p id="bio">
                I'm a 19 year old Information Engineering student from Germany, mostly building cool stuff with AVR microcontrollers. All of my projects are released as Free Software.
            </p>

            <ul id="menuList">
            <li><a href="/index.html">Home</a></li>
<li><a href="/blog.html">Blog</a></li>
<li><a href="/contact.html">Contact</a></li>
<li>&nbsp;</li>
<li><a href="/ledcube.html">8x8x8 LED Cube</a></li>
<li><a href="/yasab.html">YASAB AVR Bootloader</a></li>
<li><a href="/avrnetstack.html">avrNetStack</a></li>
<li><a href="/avrserial.html">AVR Serial Library</a></li>
<li><a href="/serialdebug.html">Serial Debug</a></li>
<li><a href="/ledmatrix.html">LED Matrix</a></li>
<li><a href="/ssop28.html">SSOP28 - DIL Adapter</a></li>
<li><a href="/xyrobot.html">xyRobot</a></li>
<li><a href="/bluetooth.html">Bluetooth UART (BTM-222)</a></li>
<li><a href="/k6x4008.html">K6x4008 SRAM</a></li>
<li><a href="/xyrobotremote.html">xyRobotRemote</a></li>
<li><a href="/rremote.html">rRemote</a></li>
<li>&nbsp;</li>
<li><a href="/c250.html">Mio C250 Unlock</a></li>
<li><a href="/nas.html">IB-NAS6210 Linux</a></li>
<li><a href="/ultimatenotifier.html">Ultimate Notifier Script</a></li>
<li><a href="/serialhelper.html">Serial Helper</a></li>
            </ul>

            <div id="recent">
                Recent blog posts:
                <ul id="recentList">
                <li class="recentList"><a href="/2013_04_11_rss.html">RSS Probleme</a></li><li class="recentDate">2013-04-11</li>
<li class="recentList"><a href="/2013_04_04_html5.html">Kein DRM in HTML5</a></li><li class="recentDate">2013-04-04</li>
<li class="recentList"><a href="/2013_04_02_zaphod.html">Neuer Webserver</a></li><li class="recentDate">2013-04-02</li>
<li class="recentList"><a href="/2013_03_25_doxygen.html">xyControl Doxygen Dokumentation</a></li><li class="recentDate">2013-03-25</li>
<li class="recentList"><a href="/2013_03_16_pid.html">xyCopter PID-Parameter</a></li><li class="recentDate">2013-03-16</li>
                </ul>
            </div>
        </div>
    </div></div>

    <img id="dude" alt="The Dude abides..." src="/img/dude.png">
    <img id="walter" alt="Mark it zero!" src="/img/walter.png">

    <div id="footer">
        Built with <a href="http://bitbucket.org/obensonne/poole">Poole</a>
        &middot;
        Licensed as <a href="http://creativecommons.org/licenses/by/3.0">CC-BY</a>
        &middot;
        <a href="http://validator.w3.org/check?uri=referer">Validate HTML</a>
        &middot;
        <a href="http://jigsaw.w3.org/css-validator/validator?uri=xythobuz.de%2Fstyle.css&amp;profile=css3">Validate CSS</a>
        &middot;
        <a href="http://feed1.w3.org/check.cgi?url=http://www.xythobuz.de/rss.xml">Validate RSS</a>
        &middot;
        <a href="http://www.validome.org/google/validate?url=http://www.xythobuz.de&amp;googleTyp=SITEMAP">Validate Sitemap</a>
    </div>
    <img src="/stats/count.php?img" alt="Analytics">
    <script src="http://gitforked.com/api/1.1/button.js" type="text/javascript"></script>
</body>
</html>