i just created a post describing the different ways to debug it. I always wanted to do it but for some reason i didn't manage
http://forum.vair-monitor.com/showthread.php?tid=71
There are also several other approaches to debugging
Now that you've enabled debug. Just let the device run, as it usually does. You do not need to keep it connected via USB.
Have a look on the post above, and tell me whether you are able to recognize the colors as described.
If not - tell me which are the ones that you can recognize, and i will add other blinking colors, so that people can choose. The current version is just the first shot.
It would be a great help for me, if in this mode the device stops sending data. As the problem may be that for some reason the I2C Bus failing and in this case the device will not send data. This can be also checked if you add some HTTP Destination for logging, (see the post) or adding an additional line in the Custom HTTP Config
http://192.168.0.5:8080/json.htm?type=co...e=%RUNTIME%
(and appropriate idx), which will dump how long the device worked.. and will be sent even if the CO2 value is unavailable