Google Chrome WebUSB API requestDevices() doesn't see barcode scanner Voyager 1450g

问题

I'm trying to access a Voyager 1450g barcode scanner that is connected via USB, but navigator.usb.requestDevices() doesn't see this device.

let button = document.getElementById('request-device');
button.addEventListener('click', async () => {
let device;
try {
    device = await navigator.usb.requestDevice({ filters: [{}]});
} catch (err) {
    // No device was selected.
    console.log('Error:', err);
}

I will be grateful for any ideas.

回答1:

I have a Honeywell Voyagar 1202g barcode scanner that I managed to get working with Mac and Windows.

First you will need to change the barcode scanners interface to CDC-ACM, either by using EZConfig (Honeywell software) or by scanning a barcode that you can find on their website.

Steps to get it working on Windows:

Install Zadig
Install HSM USB Serial Driver Package
Find your device in Windows settings and update USB Composite Device driver (Let me pick from a list of drivers, uncheck compitable drivers) to use Honeywell->WinFlash Intermec Device (without this step Zadig could not find the correct interface).
Using Zadig you should now see your device, update driver to libusbk
Restart PC (important)

Code:

const decoder = new TextDecoder();

const startDevice = async () => {
    try {
        // you should be able to discover your PRODUCT_ID and VENDOR_ID from
        // chrome://device-log
        const device = await navigator.usb.requestDevice({
            filters: {
                productId: PRODUCT_ID,
                vendorId: VENDOR_ID
            }
        });

        // log device data to see available configurations and interfaces
        await device.open();
        // only 1 configuration was available for me
        await device.selectConfiguration(1);
        // interface 1 was bulk transfer
        await device.claimInterface(1);

        readLoop(device);
    } catch (error) {
        console.error(error);
    }
}

const readLoop = async (device) => {
    try {
        const result = await device.transferIn(1, 64);
        // this is your incoming data
        const data = decoder.decode(result.data).trim();

        readLoop(device);
    } catch (error) {
        console.error(error);
    }
}

回答2:

My guess is that the virtual serial port driver (that mounts it as COM3) has captured the device. Maybe uninstall the driver and try again?

来源：https://stackoverflow.com/questions/50373111/google-chrome-webusb-api-requestdevices-doesnt-see-barcode-scanner-voyager-14

标签

webusb