Inconsistent Web USB Communication on Windows Machines #202
Description
I use the web usb for communication with the usb device having three sensors. It working fine on some of the windows and all mac os machines. But in some windows machine it get lags and sometimes works fine in same machine. I capture the data continuously. So what is the problem in this.
The code which is use is below :
const CMD1 = new Uint8Array([78, 84, 83, 83, 84, 65, 82, 84, 76, 238, 167, 78, 84, 69]);
const CMD2 = new Uint8Array([78, 84, 83, 83, 84, 65, 82, 84, 68, 40, 166, 78, 84, 69]);
var port = null;
port = await navigator.serial.requestPort();
await port.open({
baudRate: 115200
});
var selectedDevice = port.getInfo();
if (selectedDevice.usbProductId != 10 || selectedDevice.usbVendorId != 1240) {
const { writable, readable } = port;
writer = writable.getWriter();
reader = readable.getReader();
await writer.write(CMD1);
await writer.write(CMD2);
while (true) {
startLoopTimer();
const { value, done } = await reader.read();
if (done) break;
console.log('Received data:', value);
}
IMPORTANT : The issue is happening on most Windows machines with 8GB of RAM.
My device details showing in chrome://device-log is:-
SerialEvent[11:05:11] Serial device added: path=COM5 instance_id=USB\VID_04D8&PID_000A\5&2C179895&0&2 vid=04D8 pid=000A
USBUser[11:05:11] USB device added: path=?\usb#vid_04d8&pid_000a#5&2c179895&0&2#{a5dcbf10-6530-11d2-901f-00c04fb951ed} vendor=1240 "Microchip Technology Inc.", product=10 "Simple CDC Device Demo", serial="", driver="usbser", guid=f02c59af-8c78-431d-888b-6a987c1ed8e8
SerialEvent[11:05:10] Serial device removed: path=COM5
USBUser[11:05:10] USB device removed: path=?\usb#vid_04d8&pid_000a#5&2c179895&0&2#{a5dcbf10-6530-11d2-901f-00c04fb951ed} guid=3959900e-8309-4393-9be0-8c65dde53689