Chrome.hid.send Fails On Second Use

Something about my use of chrome.hid.send seems to be leaving the bus in a bad state. I consistently can NOT get my second usage of the API call to work. Sometimes, it will also

Solution 1:

The issue is that Windows requires buffers to be the full report size expected by the device. I have filed a bug against Chromium to track adding a workaround or at least a better error message to pinpoint the problem.

In general you can get more detailed error messages from the chrome.hid API by enabling verbose logging with the --enable-logging --v=1 command line options. Full documentation of Chrome logging is here.