Create device manager

WebUSB provides APIs for discovering and communicating with USB devices. The AdbDaemonWebUsbDeviceManager class wraps the WebUSB API to better work with ADB devices.

Usage

The usage of AdbDaemonWebUsbDeviceManager is different in Node.js and Web browsers:

Web

Chromium-based browsers support WebUSB natively. Chrome for Android is supported, but Chrome for iOS is based on Safari and not supported.

Electron Support

• To use Tango in Electron renderer processes, see https://www.electronjs.org/docs/latest/tutorial/devices#webusb-api for how to enable WebUSB API in Electron, then follow the instructions below
• To use Tango in Electron main processes, follow the instructions for Node.js instead

Secure Context Required

WebUSB API requires a Secure Context. Basically it means the page must be served over HTTPS or localhost.

• If you have a domain name, you can easily get a free SSL certificate from Let's Encrypt.
• If you only have an IP address, you can create a self-signed certificate and trust it in every device that will access your server (or ignore the warning every time).

Create a device manager for browsers:

JavaScript

import { AdbDaemonWebUsbDeviceManager } from "@yume-chan/adb-daemon-webusb";

const Manager = AdbDaemonWebUsbDeviceManager.BROWSER;

TypeScript

import { AdbDaemonWebUsbDeviceManager } from "@yume-chan/adb-daemon-webusb";

const Manager: AdbDaemonWebUsbDeviceManager | undefined = AdbDaemonWebUsbDeviceManager.BROWSER;

info

AdbDaemonWebUsbDeviceManager.BROWSER is a shorthand of:

navigator.usb ? new AdbDaemonWebUsbDeviceManager(navigator.usb) : undefined

In two cases, Manager may be undefined:

1. Current page isn't in a Secure Context
2. Current browser does not support WebUSB API

It's your responsibility to make sure the first case doesn't happen. So there is only one reason left:

if (!Manager) {
  alert("WebUSB is not supported in this browser");
  return;
}

Node.js

Node.js doesn't support WebUSB natively, but the usb package provides a WebUSB implementation for it.

It uses libusb library to access USB devices, which should work perfectly on Linux and macOS, but may have some issues on Windows.

npm

npm i usb

Yarn

yarn add usb

pnpm

pnpm add usb

Create a device manager using WebUSB from usb package:

JavaScript

import { AdbDaemonWebUsbDeviceManager } from "@yume-chan/adb-daemon-webusb";
import { WebUSB } from "usb";

const WebUsb = new WebUSB({ allowAllDevices: true });
const Manager = new AdbDaemonWebUsbDeviceManager(WebUsb);

TypeScript

import { AdbDaemonWebUsbDeviceManager } from "@yume-chan/adb-daemon-webusb";
import { WebUSB } from "usb";

const WebUsb: WebUSB = new WebUSB({ allowAllDevices: true });
const Manager: AdbDaemonWebUsbDeviceManager = new AdbDaemonWebUsbDeviceManager(WebUsb);

info

By default, WebUSB from usb package has the same permission system as browsers:

• Each device must be authorized separately using requestDevice method and a custom devicesFound callback
• getDevices method only returns devices that have been authorized

Passing allowAllDevices: true option disables the permission system and returns all connected devices from getDevices methods.

Next Step

Request device permission