integrating eddystone into bluetooth package

docs/reference/bluetooth.md

@@ -31,6 +31,13 @@ bluetooth.uartWriteNumber(0);
 bluetooth.uartWriteValue("", 0);
 ```
 
+## Eddystone
+
+```cards
+bluetooth.advertiseUrl("https://pxt.microbit.org/", 7);
+bluetooth.stopAdvertising();
+```
+
 ```package
 bluetooth
 ```
@@ -47,4 +54,7 @@ For more advanced information on the @boardname@ Bluetooth UART service includin
 [uartWriteString](/reference/bluetooth/uart-write-string), 
 [uartWriteNumber](/reference/bluetooth/uart-write-number), 
 [uartWriteValue](/reference/bluetooth/uart-write-value), 
-[onBluetoothConnected](/reference/bluetooth/on-bluetooth-connected), [onBluetoothDisconnected](/reference/bluetooth/on-bluetooth-disconnected)
+[onBluetoothConnected](/reference/bluetooth/on-bluetooth-connected), 
+[onBluetoothDisconnected](/reference/bluetooth/on-bluetooth-disconnected),
+[advertiseUrl](/reference/bluetooth/advertise-url),
+[stopAdvertising](/reference/bluetooth/stop-advertising)

docs/reference/bluetooth/advertise-url.md

@@ -0,0 +1,37 @@
+# Avertise Url
+
+Advertises a URL via the Eddystone protocol over Bluetooth.
+
+## ~hint
+
+### Eddystone
+
+Bluetooth beacons are used to indicate proximity to a place or object of interest. 
+Beacons use Bluetooth advertising to broadcast a small amount of data, 
+which can be received and acted upon by anyone in range with a suitable device and software, typically a smartphone and application.
+
+There are various beacon message formats, which define the way Bluetooth advertising packets are used as containers for beacon data. 
+iBeacon is Apple's beacon message format. Eddystone comes from Google.
+
+Read more at https://lancaster-university.github.io/microbit-docs/ble/eddystone/ .
+
+## ~
+
+```sig
+bluetooth.advertiseUrl("https://pxt.microbit.org/", 7);
+```
+
+### Parameters
+
+* ``url`` - a [string](/reference/types/string) containing the URL to broadcast, at most 18 characters long
+* ``power`` - a [number](/reference/types/number) representing the power level between 0 (short) and 7 (maximum range).
+
+### Example: Broadcast a secret code
+
+```blocks
+bluetooth.advertiseUrl("https://pxt.io?secret=42")
+```
+
+## See Also
+
+[stop-advertising](/reference/bluetooth/stop-advertising)

docs/reference/bluetooth/stop-advertising.md

@@ -0,0 +1,26 @@
+# Stop Advertising
+
+Stops advertising URL via the Eddystone protocol over Bluetooth.
+
+## ~hint
+
+### Eddystone
+
+Bluetooth beacons are used to indicate proximity to a place or object of interest. 
+Beacons use Bluetooth advertising to broadcast a small amount of data, 
+which can be received and acted upon by anyone in range with a suitable device and software, typically a smartphone and application.
+
+There are various beacon message formats, which define the way Bluetooth advertising packets are used as containers for beacon data. 
+iBeacon is Apple's beacon message format. Eddystone comes from Google.
+
+Read more at https://lancaster-university.github.io/microbit-docs/ble/eddystone/ .
+
+## ~
+
+```sig
+bluetooth.stop-advertising();
+```
+
+## See Also
+
+[advertise-url](/reference/bluetooth/advertise-url)