Sam El-Husseini e3975e65e5 pxt-microbit Accessibility PR (#529 )

* Accessibility changes

2017-09-07 13:42:08 -07:00

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Bluetooth Magnetometer Service

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For another device like a smartphone to use any of the Bluetooth "services" which the @boardname@ has, it must first be paired with the @boardname@. Once paired, the other device may connect to the @boardname@ and exchange data relating to many of the @boardname@'s features.

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The Bluetooth magnetometer service allows another device such as a smartphone to wirelessly receive data from the @boardname@'s magnetometer. The magnetometer measures the strength and direction of magnetic fields including the earth's and so it can be used as a digital compass and indicate the way the @boardname@ is pointing relative to magnetic north.

Using the Bluetooth magnetometer service you could, for example, create a smartphone application which displays your direction of travel, updating it in real time.

No additional code is needed on the @boardname@ to use the Bluetooth magnetometer service from another device.

bluetooth.startMagnetometerService();

Example: Starting the Bluetooth magnetometer service

The following code shows the Bluetooth magnetometer service being started:

bluetooth.startMagnetometerService();

Video - Magnetometer service demo

http://www.youtube.com/watch?v=C_0VL4Gp4_U

Advanced

For more advanced information on the @boardname@ Bluetooth magnetometer service including information on using a smartphone, see the Lancaster University @boardname@ runtime technical documentation

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