43 lines
2.0 KiB
Markdown
Executable File
43 lines
2.0 KiB
Markdown
Executable File
# Bluetooth Accelerometer Service
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### ~hint
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For another device like a smartphone to use any of the Bluetooth "services" which the micro:bit has, it must first be [paired with the micro:bit](/reference/bluetooth/bluetooth-pairing). Once paired, the other device may connect to the micro:bit and exchange data relating to many of the micro:bit's features.
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### ~
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The Bluetooth accelerometer service allows another device such as a smartphone to wirelessly receive data from the micro:bit's accelerometer. An accelerometer detects motion. More precisely, it measures acceleration in one or more of three directions which we call X, Y and Z.
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Using the Bluetooth accelerometer service you could, for example, create a smartphone application which makes a loud noise whenever your micro:bit (or the important thing you've attached it to) is moved. Or you could use your micro:bit to control the movement of a cartoon character in a game on your smartphone just by tilting the micro:bit in the direction you want the character to move in.
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No additional code is needed on the micro:bit to use the Bluetooth accelerometer service from another device.
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```sig
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bluetooth.startAccelerometerService();
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```
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### Example: Starting the Bluetooth accelerometer service
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The following code shows the Bluetooth accelerometer service being started:
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```blocks
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bluetooth.startAccelerometerService();
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```
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### Video - Accelerometer service demo - Starts at 0:18
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http://www.youtube.com/watch?v=aep_GVowKfs#t=18s
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### Advanced
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For more advanced information on the micro:bit Bluetooth accelerometer service including information on using a smartphone, see the [Lancaster University micro:bit runtime technical documentation](http://lancaster-university.github.io/microbit-docs/ble/accelerometer-service/)
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### See also
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[Bluetooth SIG](https://www.bluetooth.com), [Bluetooth on micro:bit resources](http://bluetooth-mdw.blogspot.co.uk/p/bbc-microbit.html)
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```package
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microbit-bluetooth
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```
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