usb - chrome.hid.send not sending packets -


i developing chrome app needs connected custom hid device.i able receive data the device. have write permission on hid , usb bus.yet there no data received device.
able send data via hidapi in separate program. can suggest method check whether or not chrome.hid.send working or not?
os : arch linux
chrome version : 46.0.2490.22 beta (64-bit)

well following code snippet seems work me : (taken hid sample app chrome-app-samples)

    function sendhid(){         var bytes = new uint8array(63);         bytes[0] = 0x01;//to send 0x01 hid device          chrome.hid.send(connectionid,0,bytes.buffer,function(){         if (chrome.runtime.lasterror) {             console.log(chrome.runtime.lasterror.message);             return;            }         else {             console.log("sent!");             }         });        }

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