3 axis compass
The 3-Axis Compass module measures magnetic fields in three directions – or axes, labeled X, Y, and Z. In its most simple form, the module can be used as a basic compass to find earth’s magnetic north.
To use this node in your Embrio project, either add it from the Library toolbar or copy the XML in the below box and paste it into a node screen.
<EmbrioCopy> <Version>2.0.2.0</Version> <Name>3 Axis Compass</Name> <UniqueID>00000000-0000-0000-0000-000000000000</UniqueID> <Description></Description> <NodeColor>128,128,128,255</NodeColor> <IsBuiltIn>False</IsBuiltIn> 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<Nodes> <Node> <UniqueID>e5fd8d86-cff4-4459-b24a-37df8400fa15</UniqueID> <NodeType>Dynamic</NodeType> <NodeName>Custom Arduino Node</NodeName> <UserDefinedName></UserDefinedName> <Description></Description> <NodeColor>144,183,227,255</NodeColor> <X>0</X> <Y>0</Y> <DefinitionID>eac04e4c-f805-42db-99cc-4c44e249673c</DefinitionID> <EditingProperties> <EditOffset>-195,-150,390,0</EditOffset> <InPlacePosition>249,258,260,0</InPlacePosition> <IsInEditMode>False</IsInEditMode> <CodeHeight>300</CodeHeight> <EditedLanguage>Arduino</EditedLanguage> <IsEditingIODefinitions>False</IsEditingIODefinitions> <UpdateCodeDefinitionID>29340bb1-97c1-479e-8603-dfe79af0f21a</UpdateCodeDefinitionID> </EditingProperties> <SetLength>0</SetLength> <SetInputs></SetInputs> <SetOutputs></SetOutputs> <Inputs></Inputs> <Outputs> <Output> <UniqueID>0c02db6a-51ae-4fd8-9f0c-c40d0c929182</UniqueID> <DefinitionID>cce15600-ff98-49bb-a01e-fc0245b9030c</DefinitionID> <DefaultName>X Activation</DefaultName> <CustomName>X Activation</CustomName> <IsDisplayed>True</IsDisplayed> <IsNative>False</IsNative> <TypeName>Numeric</TypeName> <IsOutsideConnection>False</IsOutsideConnection> <IOType>Embrio.NodeEngine.NodeIO.NumericNodeOutput</IOType> <ShowGraph>False</ShowGraph> <LinkedIOID>00000000-0000-0000-0000-000000000000</LinkedIOID> <IsUserAdded>True</IsUserAdded> <MinValue>0</MinValue> <MaxValue>1</MaxValue> <UseNegativeRange>False</UseNegativeRange> <CanUseNegativeRange>True</CanUseNegativeRange> </Output> <Output> <UniqueID>a710512e-d77d-4a89-84b7-d73b03d56326</UniqueID> <DefinitionID>2772bd59-d946-41bb-a092-808d4c637f94</DefinitionID> <DefaultName>Y Activation</DefaultName> <CustomName>Y Activation</CustomName> <IsDisplayed>True</IsDisplayed> <IsNative>False</IsNative> <TypeName>Numeric</TypeName> <IsOutsideConnection>False</IsOutsideConnection> <IOType>Embrio.NodeEngine.NodeIO.NumericNodeOutput</IOType> <ShowGraph>False</ShowGraph> <LinkedIOID>00000000-0000-0000-0000-000000000000</LinkedIOID> <IsUserAdded>True</IsUserAdded> <MinValue>0</MinValue> <MaxValue>1</MaxValue> <UseNegativeRange>False</UseNegativeRange> <CanUseNegativeRange>True</CanUseNegativeRange> </Output> <Output> <UniqueID>2bc00954-853e-48e9-a0c6-0aa8dafa310e</UniqueID> <DefinitionID>10a4ff74-532a-49b2-9eb8-94504ee49d15</DefinitionID> <DefaultName>Z Activation</DefaultName> <CustomName>Z Activation</CustomName> <IsDisplayed>True</IsDisplayed> <IsNative>False</IsNative> <TypeName>Numeric</TypeName> <IsOutsideConnection>False</IsOutsideConnection> <IOType>Embrio.NodeEngine.NodeIO.NumericNodeOutput</IOType> <ShowGraph>False</ShowGraph> <LinkedIOID>00000000-0000-0000-0000-000000000000</LinkedIOID> <IsUserAdded>True</IsUserAdded> <MinValue>0</MinValue> <MaxValue>1</MaxValue> <UseNegativeRange>False</UseNegativeRange> <CanUseNegativeRange>True</CanUseNegativeRange> </Output> </Outputs> </Node> </Nodes> <NodeDefinitions> <Definition> <Name>3 Axis Compass</Name> <SoftwareVersion>2.0.2.0</SoftwareVersion> <NodeColor>144,183,227,255</NodeColor> <UniqueID>eac04e4c-f805-42db-99cc-4c44e249673c</UniqueID> <Description></Description> <IsBuiltIn>False</IsBuiltIn> <TouchesPin>True</TouchesPin> <IsLanguageLocked>False</IsLanguageLocked> <UseIOSet>False</UseIOSet> 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<CategoryName>Project</CategoryName> <InputDefinitions></InputDefinitions> <OutputDefinitions> <OutputDefinition> <Type>Embrio.NodeEngine.Definitions.NumericNodeOutputDefinition</Type> <Name>X Activation</Name> <UniqueID>cce15600-ff98-49bb-a01e-fc0245b9030c</UniqueID> <IsOutsideConnection>False</IsOutsideConnection> <IsInIOSet>False</IsInIOSet> <NumericUseNegativeRange>False</NumericUseNegativeRange> </OutputDefinition> <OutputDefinition> <Type>Embrio.NodeEngine.Definitions.NumericNodeOutputDefinition</Type> <Name>Y Activation</Name> <UniqueID>2772bd59-d946-41bb-a092-808d4c637f94</UniqueID> <IsOutsideConnection>False</IsOutsideConnection> <IsInIOSet>False</IsInIOSet> <NumericUseNegativeRange>False</NumericUseNegativeRange> </OutputDefinition> <OutputDefinition> <Type>Embrio.NodeEngine.Definitions.NumericNodeOutputDefinition</Type> <Name>Z Activation</Name> <UniqueID>10a4ff74-532a-49b2-9eb8-94504ee49d15</UniqueID> <IsOutsideConnection>False</IsOutsideConnection> <IsInIOSet>False</IsInIOSet> <NumericUseNegativeRange>False</NumericUseNegativeRange> </OutputDefinition> </OutputDefinitions> <UpdateCodes> <UpdateCode> <UpdateCondition>Declaration</UpdateCondition> <CodeImplementations> <Implementation> <Code>#include &lt;Wire.h&gt; // 7-bit address of HMC5883 compass #define Addr 0x1E </Code> <Language>Arduino</Language> </Implementation> <Implementation> <Code></Code> <Language>CSharp</Language> </Implementation> </CodeImplementations> <UniqueID>29340bb1-97c1-479e-8603-dfe79af0f21a</UniqueID> </UpdateCode> <UpdateCode> <UpdateCondition>Startup</UpdateCondition> <CodeImplementations> <Implementation> <Code>Wire.begin(); // Set operating mode to continuous Wire.beginTransmission(Addr); Wire.write(byte(0x02)); Wire.write(byte(0x00)); Wire.endTransmission();</Code> <Language>Arduino</Language> </Implementation> <Implementation> <Code></Code> <Language>CSharp</Language> </Implementation> </CodeImplementations> <UniqueID>2185443e-7c79-4315-8b86-001902ae6d62</UniqueID> </UpdateCode> <UpdateCode> <UpdateCondition>EveryUpdate</UpdateCondition> <CodeImplementations> <Implementation> <Code>int x, y, z; // Initiate communications with compass Wire.beginTransmission(Addr); Wire.write(byte(0x03)); // Send request to X MSB register Wire.endTransmission(); Wire.requestFrom(Addr, 6); // Request 6 bytes; 2 bytes per axis if(Wire.available() &lt;=6) { // If 6 bytes available x = Wire.read() &lt;&lt; 8 | Wire.read(); z = Wire.read() &lt;&lt; 8 | Wire.read(); y = Wire.read() &lt;&lt; 8 | Wire.read(); } // Transform values from 0 to 1023 to 0.0 to 1.0 Output_XActivation = transform(x, 0, 1023, 0.0, 1.0); Output_YActivation = transform(y, 0, 1023, 0.0, 1.0); Output_ZActivation = transform(z, 0, 1023, 0.0, 1.0); </Code> <Language>Arduino</Language> </Implementation> <Implementation> <Code></Code> <Language>CSharp</Language> </Implementation> </CodeImplementations> <UniqueID>88e20196-5b17-4c7a-a269-c41acc3ffd9b</UniqueID> </UpdateCode> </UpdateCodes> </Definition> </NodeDefinitions> </EmbrioCopy>