MSDN says that there’s a generic USB device interface class named GUID_DEVINTERFACE_USB_DEVICE with the GUID {A5DCBF10-6530-11D2-901F-00C04FB951ED}: The system-supplied USB hub driver registers instances of GUID_DEVINTERFACE_USB_DEVICE to notify the system and applications of the presence of USB devices that are attached to a USB hub. Here’s a code example that seems to do what you want … Read more
Create a dummy window that does nothing but wait for WM_DEVICECHANGE and register that window using RegisterDeviceNotification. WMI is an overkill here, IMHO.
Aha! I figured it out. I was having the exact same problem. The gist of it is – if you have your application launch automatically when a device is plugged in (using the manifest file), then it appears the Android system gets the ACTION_USB_DEVICE_ATTACHED intent, and then since it knows your application wants to run … Read more
Eric Aya’s answer is already quite good, but here’s a Swift 3 adaptation. I wrapped most of the ugly stuff in a USBWatcher class; set yourself as the delegate of this object to receive notifications. You can copy/paste the following into a playground to see it work — the example just logs a message to … Read more
First of all, some people choose to disable autorun for security reasons; but Windows computers up to Vista have it enabled. Edit: Apparently the functionality was removed from Windows 7 onwards. Put a file named autorun.inf in the root of your USB flash drive. This is what’s in mine: [Autorun] Open=PStart.exe Action=Start portable apps Icon=diskicon.ico … Read more
Okay, I am now connecting without the semaphore timeout problem. If anyone reading ever encounters the same thing, I hope that this procedure works for you; but no promises; hey, it’s windows. In my case this was Windows 7 I got a little hint from This page on eHow; not sure if that might help … Read more
I was trying to send data over the wrong baud rate. Here’s the code that works. Posting it for everyone who is using FTDI devices and needs help. private Runnable mLoop = new Runnable() { @Override public void run() { UsbDevice dev = sDevice; if (dev == null) return; UsbManager usbm = (UsbManager) getSystemService(USB_SERVICE); UsbDeviceConnection … Read more
Some USB hubs have the ability to turn power off to its downstream devices. “Is it possible to power up ports on a USB hub from Ubuntu?” https://askubuntu.com/questions/149242/is-it-possible-to-power-up-ports-on-a-usb-hub-from-ubuntu Which points to some c source for hub-ctrl.c See: http://www.gniibe.org/development/ac-power-control-by-USB-hub/index I tested this on Ubuntu with a Dream-Cheeky USB LED unit, and it did seem to turn … Read more
The world has changed since this question was asked, and the answer is now the Android Open Accessory Development Kit. It won’t solve the problem for existing USB devices, but it makes it possible to create new devices that can use an Android device’s USB connection.
Update: As said in comments, Hal is not supported in recent distributions, the standard now is udev, Here is a small example that makes use of glib loop and udev, I keep the Hal version for historical reasons. This is basically the example in the pyudev documentation, adapted to work with older versions, and with … Read more