diff --git a/docs/reference/input/magnetic-force.md b/docs/reference/input/magnetic-force.md
index 89da6474..b795311d 100644
--- a/docs/reference/input/magnetic-force.md
+++ b/docs/reference/input/magnetic-force.md
@@ -29,7 +29,7 @@ the magnetic force is stronger, and dimmer when it is weaker.
 ```blocks
 led.plot(2, 2)
 basic.forever(() => {
-    let f = input.magneticForce("x")
+    let f = input.magneticForce(Dimension.X)
     led.setBrightness(f / 2000)
 })
 ```
diff --git a/docs/reference/led/brightness.md b/docs/reference/led/brightness.md
index f6e2e4e1..1772fead 100644
--- a/docs/reference/led/brightness.md
+++ b/docs/reference/led/brightness.md
@@ -1,6 +1,6 @@
 # Brightness
 
-Find how bright the [LED screen](/device/screen) is.
+Find how bright the [LED screen](/device/screen) is _when it is turned on_.
 
 ```sig
 led.brightness();
@@ -8,11 +8,11 @@ led.brightness();
 
 ### Returns
 
-* a [Number](/reference/types/number) that means how bright the screen is, from `0` (darkest) to `255` (brightest). For example, the number `127` means the screen is halfway bright.
+* a [number](/reference/types/number) that means how bright the screen is when it is turned on, from `0` (darkest) to `255` (brightest). For example, the number `127` means the screen is halfway bright when it is turned on.
 
 ### Example: highest brightness
 
-This program makes the screen completely bright if it is not that way already:
+This program makes the screen completely bright when it is turned on (if it is not that way already):
 
 ```blocks
 if (led.brightness() < 255) {
@@ -20,6 +20,20 @@ if (led.brightness() < 255) {
 }
 ```
 
+
+### Example: change brightness
+
+This program makes the screen brightness 100% (255).  Then it turns on
+the center LED (`2, 2`), waits for one second and then sets the screen
+brightness to 50% (128):
+
+```blocks
+led.setBrightness(255)
+led.plot(2, 2)
+basic.pause(1000)
+led.setBrightness(led.brightness() / 2)
+```
+
 ### See also
 
 [set brightness](/reference/led/set-brightness), [fade in](/reference/led/fade-in), [fade out](/reference/led/fade-out)
diff --git a/docs/reference/led/set-brightness.md b/docs/reference/led/set-brightness.md
index b9262723..3525ff83 100644
--- a/docs/reference/led/set-brightness.md
+++ b/docs/reference/led/set-brightness.md
@@ -1,6 +1,7 @@
 # Set Brightness
 
-Sets the brightness of the [LED screen](/device/screen).
+Make the [LED screen](/device/screen) as bright as you say when it is
+turned on.
 
 ```sig
 led.setBrightness(121)
@@ -8,17 +9,19 @@ led.setBrightness(121)
 
 ### Parameters
 
-* value : [Number](/reference/types/number) - the brightness of the LED screen expressed as a number between 0 and 255
+* a [number](/reference/types/number) that means how bright the screen is when it is turned on, from `0` (darkest) to `255` (brightest). For example, the number `127` means the screen is halfway bright when it is turned on.
 
 ### Example: change brightness
 
-The following example sets the screen brightness to 100% (255), turns on LED `2, 2`, waits for a second and then sets the screen brightness to 50% (127):
+This program makes the screen brightness 100% (255).  Then it turns on
+the center LED (`2, 2`), waits for one second, and then sets the screen
+brightness to 50% (128):
 
 ```blocks
 led.setBrightness(255)
 led.plot(2, 2)
 basic.pause(1000)
-led.setBrightness(127)
+led.setBrightness(led.brightness() / 2)
 ```
 
 ### See also
diff --git a/libs/microbit-bluetooth/bluetooth.cpp b/libs/microbit-bluetooth/bluetooth.cpp
index 1eed2f05..7e6f63d9 100644
--- a/libs/microbit-bluetooth/bluetooth.cpp
+++ b/libs/microbit-bluetooth/bluetooth.cpp
@@ -2,14 +2,59 @@
 #include "MESEvents.h"
 
 using namespace pxt;
-//% color=#0082FB weight=2
+//% color=#0082FB weight=20
 namespace bluetooth {
     /**
     *  Starts the Bluetooth IO pin service
     */
-    //% help=bluetooth/io-pin-service
-    //% blockId=bluetooth-io-pin-service block="bluetooth io pin service"
+    //% help=bluetooth/start-io-pin-service
+    //% blockId=bluetooth_start_io_pin_service block="bluetooth io pin service" blockGap=8
     void startIOPinService() {
         new MicroBitIOPinService(*uBit.ble, uBit.io);
     }
+
+    /**
+    *  Starts the Bluetooth LED service
+    */
+    //% help=bluetooth/start-led-service
+    //% blockId=bluetooth_start_led_service block="bluetooth led service" blockGap=8
+    void startLEDService() {
+        new MicroBitLEDService(*uBit.ble, uBit.display);
+    }
+
+    /**
+    *  Starts the temperature service
+    */
+    //% help=bluetooth/start-temperature-service
+    //% blockId=bluetooth_start_temperature_service block="bluetooth temperature service" blockGap=8
+    void startTemperatureService() {    
+        new MicroBitTemperatureService(*uBit.ble, uBit.thermometer);        
+    }
+
+    /**
+    *  Starts the magnetometer service
+    */
+    //% help=bluetooth/start-magnetometer-service
+    //% blockId=bluetooth_start_magnetometer_service block="bluetooth magnetometer service" blockGap=8
+    void startMagnetometerService() {    
+        new MicroBitMagnetometerService(*uBit.ble, uBit.compass); 
+    }
+
+    /**
+    *  Starts the accelerometer service
+    */
+    //% help=bluetooth/start-accelerometer-service
+    //% blockId=bluetooth_start_accelerometer_service block="bluetooth accelerometer service" blockGap=8
+    void startAccelerometerService() {
+        new MicroBitAccelerometerService(*uBit.ble, uBit.accelerometer);        
+    }
+
+    /**
+    *  Starts the button service
+    */
+    //% help=bluetooth/start-button-service
+    //% blockId=bluetooth_start_button_service block="bluetooth button service" blockGap=8
+    void startButtonService() {
+        new MicroBitButtonService(*uBit.ble);      
+    }
 }
diff --git a/libs/microbit-bluetooth/pxt.json b/libs/microbit-bluetooth/pxt.json
index 6d2ead02..7fab9c9d 100644
--- a/libs/microbit-bluetooth/pxt.json
+++ b/libs/microbit-bluetooth/pxt.json
@@ -20,5 +20,5 @@
             }
         }
     },
-    "installedVersion": "bpcjjs"
+    "installedVersion": "vzlhfd"
 }
diff --git a/libs/microbit-bluetooth/shims.d.ts b/libs/microbit-bluetooth/shims.d.ts
index 09260a0f..85393c00 100644
--- a/libs/microbit-bluetooth/shims.d.ts
+++ b/libs/microbit-bluetooth/shims.d.ts
@@ -2,15 +2,50 @@
 
 
 
-    //% color=#0082FB weight=2
+    //% color=#0082FB weight=20
 declare namespace bluetooth {
 
     /**
      *  Starts the Bluetooth IO pin service
      */
-    //% help=bluetooth/io-pin-service
-    //% blockId=bluetooth-io-pin-service block="bluetooth io pin service" shim=bluetooth::startIOPinService
+    //% help=bluetooth/start-io-pin-service
+    //% blockId=bluetooth_start_io_pin_service block="bluetooth io pin service" blockGap=8 shim=bluetooth::startIOPinService
     function startIOPinService(): void;
+
+    /**
+     *  Starts the Bluetooth LED service
+     */
+    //% help=bluetooth/start-led-service
+    //% blockId=bluetooth_start_led_service block="bluetooth led service" blockGap=8 shim=bluetooth::startLEDService
+    function startLEDService(): void;
+
+    /**
+     *  Starts the temperature service
+     */
+    //% help=bluetooth/start-temperature-service
+    //% blockId=bluetooth_start_temperature_service block="bluetooth temperature service" blockGap=8 shim=bluetooth::startTemperatureService
+    function startTemperatureService(): void;
+
+    /**
+     *  Starts the magnetometer service
+     */
+    //% help=bluetooth/start-magnetometer-service
+    //% blockId=bluetooth_start_magnetometer_service block="bluetooth magnetometer service" blockGap=8 shim=bluetooth::startMagnetometerService
+    function startMagnetometerService(): void;
+
+    /**
+     *  Starts the accelerometer service
+     */
+    //% help=bluetooth/start-accelerometer-service
+    //% blockId=bluetooth_start_accelerometer_service block="bluetooth accelerometer service" blockGap=8 shim=bluetooth::startAccelerometerService
+    function startAccelerometerService(): void;
+
+    /**
+     *  Starts the button service
+     */
+    //% help=bluetooth/start-button-service
+    //% blockId=bluetooth_start_button_service block="bluetooth button service" blockGap=8 shim=bluetooth::startButtonService
+    function startButtonService(): void;
 }
 
 // Auto-generated. Do not edit. Really.
diff --git a/package.json b/package.json
index 7498b001..20683d04 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "pxt-microbit",
-  "version": "0.2.160",
+  "version": "0.2.161",
   "description": "BBC micro:bit target for PXT",
   "keywords": [
     "JavaScript",
diff --git a/sim/libmbit.ts b/sim/libmbit.ts
index 52dc76dc..1e9a7a92 100644
--- a/sim/libmbit.ts
+++ b/sim/libmbit.ts
@@ -614,6 +614,27 @@ namespace pxsim.pins {
 
 }
 
+namespace pxsim.bluetooth {
+    export function startIOPinService(): void {
+        // TODO
+    }
+    export function startLEDService(): void {
+        // TODO
+    }
+    export function startTemperatureService(): void {
+        // TODO
+    }
+    export function startMagnetometerService(): void {
+        // TODO
+    }
+    export function startAccelerometerService(): void {
+        // TODO
+    }
+    export function startButtonService(): void {
+        // TODO
+    }
+}
+
 namespace pxsim.images {
     export function createImage(img: Image) { return img }
     export function createBigImage(img: Image) { return img }