diff --git a/.gitmodules b/.gitmodules
index f38e6bd..08a6b27 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "external/happycube"]
 	path = external/happycube
 	url = https://github.com/happycube/misc
+[submodule "external/Adafruit_Python_CharLCD"]
+	path = external/Adafruit_Python_CharLCD
+	url = https://github.com/adafruit/Adafruit_Python_CharLCD
diff --git a/NOTES/LCD.HOWTO b/NOTES/LCD.HOWTO
new file mode 100644
index 0000000..281e168
--- /dev/null
+++ b/NOTES/LCD.HOWTO
@@ -0,0 +1,30 @@
+From: https://learn.adafruit.com/adafruit-16x2-character-lcd-plus-keypad-for-raspberry-pi/usage
+
+* edit /etc/modules, add i2c-bcm2708 and i2c-dev
+* sudo apt-get install i2c-tools python-smbus
+* confirm that the lcd was detected by running:
+    sudo i2cdetect -y 0 (if you are using a version 1 Raspberry Pi)
+    sudo i2cdetect -y 1 (if you are using a version 2 Raspberry
+  you should see it show up at 0x20
+* sudo apt-get update
+* sudo apt-get install build-essential python-dev python-smbus python-pip git
+* sudo pip install RPi.GPIO
+* git clone https://github.com/adafruit/Adafruit_Python_CharLCD.git
+* cd Adafruit_Python_CharLCD
+* sudo python setup.py install
+* test by running:
+    cd examples
+    sudo python char_lcd_plate.py
+
+Look at the contents of the char_lcd_plate.py file to see the basic usage of the character LCD plate class. The basic usage is to import the library and create an instance of the Adafruit_CharLCDPlate class. The char LCD plate class is smart enough to know how to talk to the character LCD plate without any configuration or parameters. 
+
+Once you have an instance of the Adafruit_CharLCDPlate class there are a few functions you can call to interact with the display:
+message(text)
+Print the provided string message to the display. The text string can include linebreak characters ('\n') and will move to the next line when found in the string.
+clear()
+Clear the display and reset the position of message printing to the first column and first line.
+set_color(red, green, blue)
+Set the color of the red, green, and blue backlight LEDs. Each color value should be a 1 for on or 0 for off. For example to set a red backlight call set_color(1,0,0) or to set a purple color call set_color(1,0,1).
+You can find a more detailed write-up of the library in this character LCD guide (see the Usage and Raspberry Pi Char LCD Plate pages).
+
+more at: https://learn.adafruit.com/character-lcd-with-raspberry-pi-or-beaglebone-black/overview
diff --git a/external/Adafruit_Python_CharLCD b/external/Adafruit_Python_CharLCD
new file mode 160000
index 0000000..513307d
--- /dev/null
+++ b/external/Adafruit_Python_CharLCD
@@ -0,0 +1 @@
+Subproject commit 513307d0edc895e4279e83225b6d717b1c1f6d4c
diff --git a/external/happycube b/external/happycube
index 6b1df9d..f9e4414 160000
--- a/external/happycube
+++ b/external/happycube
@@ -1 +1 @@
-Subproject commit 6b1df9dff09d83ccd32cb7c12e85a6c9285db6af
+Subproject commit f9e441450b5e395c50d4ab2c48c91c488b9423e0