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	<id>https://wiki.mchobby.be/index.php?action=history&amp;feed=atom&amp;title=Pololu-Zumo-Shield-Arduino-boussole</id>
	<title>Pololu-Zumo-Shield-Arduino-boussole - Historique des versions</title>
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	<updated>2026-08-31T07:23:38Z</updated>
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	<entry>
		<id>https://wiki.mchobby.be/index.php?title=Pololu-Zumo-Shield-Arduino-boussole&amp;diff=22574&amp;oldid=prev</id>
		<title>Admin le 16 avril 2017 à 22:17</title>
		<link rel="alternate" type="text/html" href="https://wiki.mchobby.be/index.php?title=Pololu-Zumo-Shield-Arduino-boussole&amp;diff=22574&amp;oldid=prev"/>
		<updated>2017-04-16T22:17:53Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left diff-editfont-monospace&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;fr&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Version précédente&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Version du 16 avril 2017 à 22:17&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot; &gt;Ligne 1 :&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Ligne 1 :&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{Pololu-Zumo-Shield-Arduino-NAV}}&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{Pololu-Zumo-Shield-Arduino-NAV}}&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;{{traduction}}&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;Ce croquis/sketch d'exemple démontre l'utilisation du magnétomètre du shield Zumo (le module boussole 3-axes LSM303, décrit dans la section [[Pololu-Zumo-Shield-Arduino-seneur-inertiel|Section 3.d]]) pour aider le Zumo à coordonner ses moteurs pour faire des rotations de 90° et se déplacer en carré. Une fois la bibliothèque Arduino du shield Zumo installée, le croquis/sketch Arduino peut être ouvert via le point de menu  '''Fichier &amp;gt; Exemples &amp;gt; ZumoExamples &amp;gt; Compass'''. Cet exemple requière l'installation de la [https://github.com/pololu/lsm303-arduino bibliothèque LSM303].&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;This example program demonstrates using the magnetometer in the Zumo Shield’s LSM303 3-axis compass module &lt;/del&gt;(&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;described in section [[Pololu-Zumo-Shield-Arduino-seneur-inertiel|Section 3.d]]&lt;/del&gt;) &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;to help the Zumo coordinate ninety-degree turns and drive in squares&lt;/del&gt;. &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;With the Zumo Shield Arduino Libraries installed&lt;/del&gt;, &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;the sketch file can be opened in Arduino by selecting &lt;/del&gt;'''&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;Fichier &amp;gt; Exemples &amp;gt; ZumoExamples &amp;gt; Compass&lt;/del&gt;'''. &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;This example also requires the [https:&lt;/del&gt;/&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;/github.com/pololu/lsm303-arduino bibliothèque LSM303] to be installed.&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;Les piles, le moteur, les courants dans le moteurs affecte les mesures sur l'axe Z du magnétomètre &lt;/ins&gt;(&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;dans une proportion nettement plus importante que pour les axes X et Y&lt;/ins&gt;). &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;Pour cette raison&lt;/ins&gt;, &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;le programme calcule l&lt;/ins&gt;'&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;orientation du Zumo en utilisant uniquement les lectures sur l&lt;/ins&gt;'&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;axe X et Y du magnétomètre; le programme part du principe que le Zumo reste au même niveau. Avant chaque rotation, le programme fait un relevé magnétique (de la direction actuelle du Zumo) puis fait une rotation &lt;/ins&gt;''&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;relative&lt;/ins&gt;'' &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;de 90°&lt;/ins&gt;. &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt; Le relevé juste avant rotation permet de se prévenir de l'influence des sources externes, variations&lt;/ins&gt;/&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;perturbations locales du champs magnétique &lt;/ins&gt;(&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;ex: produit par les barres d'aciers dans les bétons armés&lt;/ins&gt;).  &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt; &lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot;&gt; &lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;Because the batteries, motors, and motor current affect the z axis of the magnetometer much more strongly than the x and y axes, this program calculates the Zumo’s orientation using only the x and y readings from the magnetometer, assuming that the robot is always level. In order to prevent external, locally varying magnetic fields &lt;/del&gt;(&lt;del class=&quot;diffchange diffchange-inline&quot;&gt;e.g. from rebar in a concrete floor&lt;/del&gt;) &lt;del class=&quot;diffchange diffchange-inline&quot;&gt;from affecting the Zumo’s navigation too much, the program measures the magnetic heading before each turn, then turns ninety degrees relative to that heading&lt;/del&gt;.&lt;/div&gt;&lt;/td&gt;&lt;td colspan=&quot;2&quot;&gt; &lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{Pololu-Zumo-Shield-Arduino-TRAILER}}&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{Pololu-Zumo-Shield-Arduino-TRAILER}}&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Admin</name></author>
	</entry>
	<entry>
		<id>https://wiki.mchobby.be/index.php?title=Pololu-Zumo-Shield-Arduino-boussole&amp;diff=22548&amp;oldid=prev</id>
		<title>Admin le 13 avril 2017 à 14:52</title>
		<link rel="alternate" type="text/html" href="https://wiki.mchobby.be/index.php?title=Pololu-Zumo-Shield-Arduino-boussole&amp;diff=22548&amp;oldid=prev"/>
		<updated>2017-04-13T14:52:46Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table class=&quot;diff diff-contentalign-left diff-editfont-monospace&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;fr&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Version précédente&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Version du 13 avril 2017 à 14:52&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l3&quot; &gt;Ligne 3 :&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Ligne 3 :&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{traduction}}&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{traduction}}&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt;−&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;This example program demonstrates using the magnetometer in the Zumo Shield’s LSM303 3-axis compass module (described in section Section 3.d) to help the Zumo coordinate ninety-degree turns and drive in squares. With the Zumo Shield Arduino Libraries installed, the sketch file can be opened in Arduino by selecting '''Fichier &amp;gt; Exemples &amp;gt; ZumoExamples &amp;gt; Compass'''. This example also requires the [https://github.com/pololu/lsm303-arduino bibliothèque LSM303] to be installed.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt;+&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;This example program demonstrates using the magnetometer in the Zumo Shield’s LSM303 3-axis compass module (described in section &lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;[[Pololu-Zumo-Shield-Arduino-seneur-inertiel|&lt;/ins&gt;Section 3.d&lt;ins class=&quot;diffchange diffchange-inline&quot;&gt;]]&lt;/ins&gt;) to help the Zumo coordinate ninety-degree turns and drive in squares. With the Zumo Shield Arduino Libraries installed, the sketch file can be opened in Arduino by selecting '''Fichier &amp;gt; Exemples &amp;gt; ZumoExamples &amp;gt; Compass'''. This example also requires the [https://github.com/pololu/lsm303-arduino bibliothèque LSM303] to be installed.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Because the batteries, motors, and motor current affect the z axis of the magnetometer much more strongly than the x and y axes, this program calculates the Zumo’s orientation using only the x and y readings from the magnetometer, assuming that the robot is always level. In order to prevent external, locally varying magnetic fields (e.g. from rebar in a concrete floor) from affecting the Zumo’s navigation too much, the program measures the magnetic heading before each turn, then turns ninety degrees relative to that heading.&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Because the batteries, motors, and motor current affect the z axis of the magnetometer much more strongly than the x and y axes, this program calculates the Zumo’s orientation using only the x and y readings from the magnetometer, assuming that the robot is always level. In order to prevent external, locally varying magnetic fields (e.g. from rebar in a concrete floor) from affecting the Zumo’s navigation too much, the program measures the magnetic heading before each turn, then turns ninety degrees relative to that heading.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{Pololu-Zumo-Shield-Arduino-TRAILER}}&lt;/div&gt;&lt;/td&gt;&lt;td class='diff-marker'&gt; &lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{Pololu-Zumo-Shield-Arduino-TRAILER}}&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Admin</name></author>
	</entry>
	<entry>
		<id>https://wiki.mchobby.be/index.php?title=Pololu-Zumo-Shield-Arduino-boussole&amp;diff=22547&amp;oldid=prev</id>
		<title>Admin : Page créée avec « {{Pololu-Zumo-Shield-Arduino-NAV}}  {{traduction}}  This example program demonstrates using the magnetometer in the Zumo Shield’s LSM303 3-axis compass module (described... »</title>
		<link rel="alternate" type="text/html" href="https://wiki.mchobby.be/index.php?title=Pololu-Zumo-Shield-Arduino-boussole&amp;diff=22547&amp;oldid=prev"/>
		<updated>2017-04-13T14:52:01Z</updated>

		<summary type="html">&lt;p&gt;Page créée avec « {{Pololu-Zumo-Shield-Arduino-NAV}}  {{traduction}}  This example program demonstrates using the magnetometer in the Zumo Shield’s LSM303 3-axis compass module (described... »&lt;/p&gt;
&lt;p&gt;&lt;b&gt;Nouvelle page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;{{Pololu-Zumo-Shield-Arduino-NAV}}&lt;br /&gt;
&lt;br /&gt;
{{traduction}}&lt;br /&gt;
&lt;br /&gt;
This example program demonstrates using the magnetometer in the Zumo Shield’s LSM303 3-axis compass module (described in section Section 3.d) to help the Zumo coordinate ninety-degree turns and drive in squares. With the Zumo Shield Arduino Libraries installed, the sketch file can be opened in Arduino by selecting '''Fichier &amp;gt; Exemples &amp;gt; ZumoExamples &amp;gt; Compass'''. This example also requires the [https://github.com/pololu/lsm303-arduino bibliothèque LSM303] to be installed.&lt;br /&gt;
&lt;br /&gt;
Because the batteries, motors, and motor current affect the z axis of the magnetometer much more strongly than the x and y axes, this program calculates the Zumo’s orientation using only the x and y readings from the magnetometer, assuming that the robot is always level. In order to prevent external, locally varying magnetic fields (e.g. from rebar in a concrete floor) from affecting the Zumo’s navigation too much, the program measures the magnetic heading before each turn, then turns ninety degrees relative to that heading.&lt;br /&gt;
&lt;br /&gt;
{{Pololu-Zumo-Shield-Arduino-TRAILER}}&lt;/div&gt;</summary>
		<author><name>Admin</name></author>
	</entry>
</feed>