AndProx modified version.

• Upstream repository: https://github.com/mik3y/usb-serial-for-android
• This repository: https://github.com/AndProx/usb-serial-for-android

This branch of the library is used by AndProx, an Android port of the Proxmark 3 RFID client. It contains some modifications compared to upstream:

• Ported to Java 8.
• Builds on Android SDK 28.
• Deleted all serial drivers except for CDC-ACM.
• Deleted unused code.
• Adds USB device information for Proxmark 3 hardware.
• Deletes USB device information for non-Proxmark 3 hardware.

No warranty is given to those who want to use this code outside of AndProx. Pull requests are accepted, but only in the context of an AndProx issue.

You are welcome to adapt changes in your own branch of usb-serial-for-android.

The only code that gets built or touched is the usbSerialForAndroid directory.

Original README follows:

This is a driver library for communication with Arduinos and other USB serial hardware on Android, using the Android USB Host API available on Android 3.1+.

No root access, ADK, or special kernel drivers are required; all drivers are implemented in Java. You get a raw serial port with read(), write(), and other basic functions for use with your own protocols.

• Homepage: https://github.com/mik3y/usb-serial-for-android
• Google group: http://groups.google.com/group/usb-serial-for-android
• Latest release: v0.1.0

1. Link your project to the library.

2. Copy device_filter.xml to your project's res/xml/ directory.

3. Configure your AndroidManifest.xml to notify your app when a device is attached (see Android USB Host documentation for help).

<activity
    android:name="..."
    ...>
  <intent-filter>
    <action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" />
  </intent-filter>
  <meta-data
      android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED"
      android:resource="@xml/device_filter" />
</activity>

4. Use it! Example code snippet:

// Find all available drivers from attached devices.
UsbManager manager = (UsbManager) getSystemService(Context.USB_SERVICE);
List<UsbSerialDriver> availableDrivers = UsbSerialProber.getDefaultProber().findAllDrivers(manager);
if (availableDrivers.isEmpty()) {
  return;
}

// Open a connection to the first available driver.
UsbSerialDriver driver = availableDrivers.get(0);
UsbDeviceConnection connection = manager.openDevice(driver.getDevice());
if (connection == null) {
  // You probably need to call UsbManager.requestPermission(driver.getDevice(), ..)
  return;
}

// Read some data! Most have just one port (port 0).
UsbSerialPort port = driver.getPorts().get(0);
try {
  port.open(connection);
  port.setParameters(115200, 8, UsbSerialPort.STOPBITS_1, UsbSerialPort.PARITY_NONE);

  byte buffer[] = new byte[16];
  int numBytesRead = port.read(buffer, 1000);
  Log.d(TAG, "Read " + numBytesRead + " bytes.");
} catch (IOException e) {
  // Deal with error.
} finally {
  port.close();
}

For a more complete example, see the UsbSerialExamples project in git, which is a simple application for reading and showing serial data.

A simple Arduino application is also available which can be used for testing.

Sometimes you may need to do a little extra work to support devices which usb-serial-for-android doesn't [yet] know about -- but which you know to be compatible with one of the built-in drivers. This may be the case for a brand new device or for one using a custom VID/PID pair.

UsbSerialProber is a class to help you find and instantiate compatible UsbSerialDrivers from the tree of connected UsbDevices. Normally, you will use the default prober returned by UsbSerialProber.getDefaultProber(), which uses the built-in list of well-known VIDs and PIDs that are supported by our drivers.

To use your own set of rules, create and use a custom prober:

// Probe for our custom CDC devices, which use VID 0x1234
// and PIDS 0x0001 and 0x0002.
ProbeTable customTable = new ProbeTable();
customTable.addProduct(0x1234, 0x0001, CdcAcmSerialDriver.class);
customTable.addProduct(0x1234, 0x0002, CdcAcmSerialDriver.class);

UsbSerialProber prober = new UsbSerialProber(customTable);
List<UsbSerialDriver> drivers = prober.findAllDrivers(usbManager);
// ...

Of course, nothing requires you to use UsbSerialProber at all: you can instantiate driver classes directly if you know what you're doing; just supply a compatible UsbDevice.

• Serial chips: FT232R, CDC/ACM (eg Arduino Uno) and possibly others. See CompatibleSerialDevices.
• Android phones and tablets: Nexus 7, Motorola Xoom, and many others. See CompatibleAndroidDevices.

usb-serial-for-android is written and maintained by mike wakerly.

This library is licensed under LGPL Version 2.1. Please see LICENSE.txt for the complete license.

Copyright 2011-2012, Google Inc. All Rights Reserved.

Portions of this library are based on libftdi (http://www.intra2net.com/en/developer/libftdi). Please see FtdiSerialDriver.java for more information.

For common problems, see the Troubleshooting wiki page.

For other help and discussion, please join our Google Group, usb-serial-for-android.

Are you using the library? Let us know on the group and we'll add your project to ProjectsUsingUsbSerialForAndroid.