<NME> ChromeOS.md
<BEF> ADDFILE
<MSG> Create ChromeOS.md
<DFF> @@ -0,0 +1,35 @@
+## Using WALT on ChromeOS
+
+WALT can be used on ChromeOS in two different modes:
+ 1. Via the [pywalt/walt.py](/pywalt/walt.py) command line script - for this mode refer to [pywalt/README.md](/pywalt/README.md)
+ 1. Using the [WALT Android app](https://play.google.com/store/apps/details?id=org.kamrik.latency.walt) and walt.py script as a bridge
+
+
+For either mode you will need to use a ChromeOS test image -
+[some pointers on how to get it installed](https://www.chromium.org/chromium-os/testing/autotest-developer-faq/ssh-test-keys-setup)
+
+Copy the [pywalt/](/pywalt) directory from WALT repo to the Chromebook.
+
+Connect WALT to Chromebook's USB port and test the setup by running: `$ ./walt.py -t sanity` on the Chromebook.
+This continuously displays readings from WALT's sensors (press Ctrl-C to stop):
+```
+Starting sanity test
+q G:480 PD_screen:3 PD_laser:910	min-max: 480-480 3-3 910-910
+q G:514 PD_screen:3 PD_laser:896	min-max: 480-514 3-3 896-910
+q G:486 PD_screen:4 PD_laser:894	min-max: 480-514 3-4 894-910
+q G:509 PD_screen:4 PD_laser:891	min-max: 480-514 3-4 891-910
+...
+```
+The first reading `G` is the accelerometer, it should change when WALT is rotated.
+`PD_screen` and `PD_laser` are the light sensors (photodiodes), shading them or exposing to light should change their readings.
+
+
+### Using WALT Android app
+
+If you intend to run the android app, run walt.py in TCP bridge mode. This is needed because Android container on ChromeOS has no access to USB.
+ - `iptables -A INPUT -p tcp --dport 50007 -j ACCEPT`
+ - `./walt.py -t bridge`
+
+The script will respond with `Listening on port 50007`. It can be stopped by pressing Ctrl-C. At this point you should be able to use the WALT Android app as if it's running on a regular Android device. If you reset or reconnect the WALT device, you'll need to re-run the script (no need to re-run the iptables command).
+
+If you need to deploy your own version of WALT Android app, follow instruction in [Development.md](Development.md)

Create ChromeOS.md