diff --git a/docs/device/serial.md b/docs/device/serial.md
index 4d5cd48f..f6fecc7a 100644
--- a/docs/device/serial.md
+++ b/docs/device/serial.md
@@ -33,9 +33,16 @@ If you are using the Google Chrome browser, you can use our extension to get ser
 
 ### Windows
 
-You must install a device driver (for the computer to recognize the serial interface of the micro:bit); then, you must also install a terminal emulator (which is going to connect to the micro:bit and read its output). Here's how to do it:
+You must install a device driver (for the computer to recognize the
+serial interface of the micro:bit); then, you must also install a
+terminal emulator (which is going to connect to the micro:bit and read
+its output).
 
-* Follow instructions at https://developer.mbed.org/handbook/Windows-serial-configuration in order to install the device driver
+* Follow the instructions at
+  https://developer.mbed.org/handbook/Windows-serial-configuration to
+  install the device driver.
+
+* Instructions for installing a terminal emulator are below.
 
 #### Windows > Tera Term
 
@@ -66,14 +73,16 @@ If you prefer another terminal emulator (such as [PuTTY](http://www.putty.org/))
 
 ### Linux
 
-(Untested).
+* Install the program `screen` if it is not already installed.
+* Plug in the micro:bit.
+* Open a terminal.
+* Find which device node the micro:bit was assigned to with the command `ls /dev/ttyACM*`.
+* If it was `/dev/ttyACM0`, type the command `screen /dev/ttyACM0 115200`. If it was some other device node,
+  use that one in the command instead. **Note:** You may need root access to run `screen`
+  successfully. You can probably use the command `sudo` like this: `sudo screen /dev/ttyACM0 115200`.
+* To exit `screen`, type `Ctrl-A` `Ctrl-D`.
 
-* Plug in the micro:bit
-* Open a terminal
-* `dmesg | tail` will show you which `/dev/` node the micro:bit was assigned (e.g. `/dev/ttyUSB0`)
-* Then, do: `screen /dev/ttyUSB0 115200` (install the `screen` program if you don't have it). To exit, run `Ctrl-A` `Ctrl-D`.
-
-Alternative programs include minicom, etc.
+Alternative programs include `minicom` and so on.
 
 ### Mac OS
 
diff --git a/docs/reference/game/touching.md b/docs/reference/game/touching.md
index ea526b94..afe6962a 100644
--- a/docs/reference/game/touching.md
+++ b/docs/reference/game/touching.md
@@ -2,7 +2,12 @@
 
 Reports true if sprite is touching specified sprite
 
+```blocks
+let matter = game.createSprite(2, 2);
+let antimatter = game.createSprite(2, 2);
+if (matter.isTouching(antimatter)) {
+    basic.pause(500);
+    basic.clearScreen();
+    basic.showString("BOOM!");
+}
 ```
-export function isTouching(_this: micro_bitSprites.LedSprite, other: micro_bitSprites.LedSprite) : boolean
-```
-
diff --git a/docs/reference/led/stop-animation.md b/docs/reference/led/stop-animation.md
index e07599ae..af7d9d4b 100644
--- a/docs/reference/led/stop-animation.md
+++ b/docs/reference/led/stop-animation.md
@@ -1,8 +1,22 @@
 # Stop Animation
 
-Cancels the current animation and clears other pending animations .
+Stop the animation that is playing and any animations that are waiting to
+play.
 
 ```sig
 led.stopAnimation()
 ```
 
+### Example
+
+This program...
+
+```blocks
+basic.showString("STOP ME! STOP ME! PLEASE, WON'T SOMEBODY STOP ME?");
+input.onButtonPressed(Button.B, () => {
+    led.stopAnimation();
+});
+'```
+### See Also
+
+
diff --git a/docs/reference/serial/redirect-to.md b/docs/reference/serial/redirect-to.md
new file mode 100644
index 00000000..0cfb6671
--- /dev/null
+++ b/docs/reference/serial/redirect-to.md
@@ -0,0 +1,31 @@
+# Serial Redirect To
+
+Dynamically configure the serial instance to use pins other than
+``USBTX`` and ``USBRX``.
+
+```sig
+serial.redirect(SerialPin.P0, SerialPin.P0, BaudRate.BaudRate115200);
+```
+
+### Parameters
+
+* ``tx``: the [serial pin](/device/pins) on which to transmit data 
+* ``rx``: the [serial pin](/device/pins) on which to receive data 
+* ``rate``: the baud rate at which to transmit and receive data (either `9600` or ``115200``)
+
+### Example
+
+When button ``A`` is pressed, the following example reconfigures the
+serial instance. The new configuration uses pin ``P1`` to transmit and
+``P2`` to receive, at a baud rate of `9600`.
+
+```blocks
+input.onButtonPressed(Button.A, () => {
+    serial.redirect(SerialPin.P1, SerialPin.P2, BaudRate.BaudRate9600);
+});
+```
+
+### See also
+
+[serial](/device/serial)
+
diff --git a/docs/reference/serial/write-line.md b/docs/reference/serial/write-line.md
index b0aca910..c9b3171d 100644
--- a/docs/reference/serial/write-line.md
+++ b/docs/reference/serial/write-line.md
@@ -1,14 +1,32 @@
-# Write Line
+# Serial Write Line
 
-Writes a string and a new line character (`\r\n`) to [serial](/device/serial).
+Write a string to the [serial](/device/serial) port and start a new line of text
+by writing `\r\n`.
 
 ```sig
 serial.writeLine("");
 ```
 
+### Parameters
+
+* `text` is the [string](/reference/types/string) to write to the serial port
+
+### Example: simple serial
+
+This program writes the word `BOFFO` to the serial port repeatedly.
+
+```blocks
+basic.forever(() => {
+    serial.writeLine("BOFFO");
+    basic.pause(5000);
+});
+```
+
 ### Example: streaming data
 
-The following example constantly checks the [compass heading](/reference/input/compass-heading) and sends the direction to serial.
+This program checks the
+[compass heading](/reference/input/compass-heading) and sends the
+direction to the serial port repeatedly.
 
 ```blocks
 basic.forever(() => {
@@ -26,8 +44,9 @@ basic.forever(() => {
     }
 })
 ```
-
 ### See also
 
-[serial](/device/serial), [write value](/reference/serial/write-value)
-
+[serial](/device/serial),
+[serial write number](/reference/serial/write-number),
+[serial write string](/reference/serial/write-string),
+[serial write value](/reference/serial/write-value)
diff --git a/docs/reference/serial/write-number.md b/docs/reference/serial/write-number.md
new file mode 100644
index 00000000..7e29cfbc
--- /dev/null
+++ b/docs/reference/serial/write-number.md
@@ -0,0 +1,41 @@
+# Serial Write Number
+
+Write a number to the [serial](/device/serial) port.
+
+```sig
+serial.writeNumber(0);
+```
+
+### Parameters
+
+* `value` is the [number](/reference/types/number) to write to the serial port
+
+### Example: one through ten
+
+This program repeatedly writes a 10-digit number to the serial port.
+
+```blocks
+basic.forever(() => {
+    serial.writeNumber(1234567890);
+    basic.pause(5000);
+});
+```
+
+### Example: plot bar graph does serial
+
+If you use the ``led.plotBarGraph`` function, it writes the number
+being plotted to the serial port too.
+
+```blocks
+basic.forever(() => {
+    led.plotBarGraph(input.lightLevel(), 255)
+    basic.pause(10000);
+})
+```
+
+### See also
+
+[serial](/device/serial),
+[serial write line](/reference/serial/write-line),
+[serial write value](/reference/serial/write-value)
+
diff --git a/docs/reference/serial/write-string.md b/docs/reference/serial/write-string.md
new file mode 100644
index 00000000..4c673ff4
--- /dev/null
+++ b/docs/reference/serial/write-string.md
@@ -0,0 +1,31 @@
+# Serial Write String
+
+Write a string to the [serial](/device/serial) port,
+without starting a new line afterward.
+
+```sig
+serial.writeString("");
+```
+
+### Parameters
+
+* `text` is the [string](/reference/types/string) to write to the serial port
+
+### Example: simple serial
+
+This program writes the word `JUMBO` to the serial port repeatedly,
+without any new lines.
+
+```blocks
+basic.forever(() => {
+    serial.writeString("JUMBO");
+    basic.pause(1000);
+});
+```
+
+### See also
+
+[serial](/device/serial),
+[serial write line](/reference/serial/write-line),
+[serial write number](/reference/serial/write-number),
+[serial write value](/reference/serial/write-value)
diff --git a/docs/reference/serial/write-value.md b/docs/reference/serial/write-value.md
index a764ae54..bdc60607 100644
--- a/docs/reference/serial/write-value.md
+++ b/docs/reference/serial/write-value.md
@@ -1,14 +1,23 @@
 # Write Value
 
-Writes name/value pair and a new line character (`\r\n`) to [serial](/device/serial).
+Write a name/value pair and a newline character (`\r\n`) to the [serial](/device/serial) port.
 
 ```sig
 serial.writeValue("x", 0);
 ```
 
+### Parameters
+
+* `name` is the [string](/reference/types/string) to write to the serial port
+* `value` is the [number](/reference/types/number) to write to the serial port
+
+
+
+
 ### Example: streaming data
 
-The sample below sends the temperature and light level every 10 seconds.
+Every 10 seconds, the example below sends the temperature and light level
+to the serial port.
 
 ```blocks
 basic.forever(() => {
@@ -18,19 +27,17 @@ basic.forever(() => {
 })
 ```
 
-### Plot bar graph does serial!
+#### ~hint
 
-If you use the `led.plotBarGraph` function, it automatically writes the value to the serial as well.
-
-```blocks
-basic.forever(() => {
-    led.plotBarGraph(input.lightLevel(), 255)
-    basic.pause(10000);
-})
-```
+The [send value](/reference/radio/send-value) function broadcasts
+string/number pairs.  You can use a second micro:bit to receive them,
+and then send them directly to the serial port with ``write value``.
 
+#### ~
 
 ### See also
 
-[serial](/device/serial), [write line](/reference/serial/write-line)
-
+[serial](/device/serial),
+[serial write line](/reference/serial/write-line),
+[serial write number](/reference/serial/write-number),
+[send value](/reference/radio/send-value)
diff --git a/libs/microbit/pxt.json b/libs/microbit/pxt.json
index 9e06c1e9..d45a0a08 100644
--- a/libs/microbit/pxt.json
+++ b/libs/microbit/pxt.json
@@ -36,6 +36,7 @@
     "public": true,
     "dependencies": {},
     "yotta": {
+        "configIsJustDefaults": true,
         "config": {
             "microbit-dal": {
                 "bluetooth": {
diff --git a/package.json b/package.json
index b0da9a68..ad22fb76 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "pxt-microbit",
-  "version": "0.2.185",
+  "version": "0.2.186",
   "description": "BBC micro:bit target for PXT",
   "keywords": [
     "JavaScript",
@@ -29,6 +29,6 @@
     "typescript": "^1.8.7"
   },
   "dependencies": {
-    "pxt-core": "0.2.193"
+    "pxt-core": "0.2.194"
   }
 }
diff --git a/ptrcheck-ignore b/ptrcheck-ignore
new file mode 100644
index 00000000..3fd6c12d
--- /dev/null
+++ b/ptrcheck-ignore
@@ -0,0 +1,13 @@
+microbit
+microbit-appx
+microbit-beta
+microbit-git-*
+microbit-latest
+microbit-logo-svg
+microbit-portraitlogo-svg
+microbit-splashscreen-svg
+microbit-squarelogo-svg
+microbit-test
+microbit-theme-json
+microbit-uploader-exe
+microbit-uploader-zip