44 lines
2.1 KiB
Markdown
Executable File
44 lines
2.1 KiB
Markdown
Executable File
# Bluetooth Magnetometer Service
|
|
|
|
### ~hint
|
|
|
|
|
|
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@](/reference/bluetooth/bluetooth-pairing). Once paired, the other device may connect to the @boardname@ and exchange data relating to many of the @boardname@'s features.
|
|
|
|
### ~
|
|
|
|
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.
|
|
|
|
```sig
|
|
bluetooth.startMagnetometerService();
|
|
```
|
|
|
|
### Example: Starting the Bluetooth magnetometer service
|
|
|
|
The following code shows the Bluetooth magnetometer service being started:
|
|
|
|
```blocks
|
|
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](http://lancaster-university.github.io/microbit-docs/ble/magnetometer-service/)
|
|
|
|
### See also
|
|
|
|
[About Bluetooth](/reference/bluetooth/about-bluetooth), [@boardname@ Bluetooth profile overview ](http://lancaster-university.github.io/microbit-docs/ble/profile/), [@boardname@ Bluetooth profile reference](http://lancaster-university.github.io/microbit-docs/resources/bluetooth/microbit-profile-V1.9-Level-2.pdf), [Bluetooth on @boardname@ resources](http://bluetooth-mdw.blogspot.co.uk/p/bbc-microbit.html), [Bluetooth SIG](https://www.bluetooth.com)
|
|
|
|
|
|
```package
|
|
bluetooth
|
|
```
|