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I have a developer tablet, and I also need some peripherals connected via USB to my tablet and debug cable at the same time. I tried to connect USB hub to my tablet using OTG cable, by got the problem - tablet can use peripherals, but PC doesn't show the device in adb devices.

Is it possible to connect debug cable and USB peripherals to my tablet at the same time?

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No, this is not possible. In order for your device to be in debug mode/connect to the computer with the debug cable, it needs to be connected as a slave device. The OTG cable tells the tablet to go into host mode. So now your computer is telling your tablet to be a slave but through the enumeration with the OTG cable the tablet believes it needs to be the master, there's a quarrel and it appears the tablet wins and is the master and thus your computer does not acknowledge the tablet's existence.

If you need the debugging tools have you looked into ADB wireless debugging? (Sorry I can't find the link right now but I've used it in the past and know it is somewhere on the developer.android.com site)

I couldn't find the link so I figured out how to do it again:

  1. Open the command prompt and navigate to your sdk/platform-tools/ folder.
  2. Type adb tcpip 5555
  3. Type adb connect <your device IP address>:5555
  4. At this point you unplug your device and type adb logcat
  5. At times, such as unplugging/plugging into a USB device, the logcat will become disconnected, just redo steps 3 & 4.
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  1. Make sure the phone and PC are on the same network (pingable), then get the IP address of the phone from WiFi settings.

  2. From Android Studio's terminal window, cd to where your platform-tools are located. Example: cd C:\Android\sdk\platform-tools

  3. By default, ADB will be in USB mode, so you can see your connected phone with adb devices

  4. So, restart ADB with cmd adb tcpip 5556

  5. Then connect with cmd adb connect 192.168.141.115:5556 where the IP is the IP of the phone

  6. adb devices should now show the ip:port device

    C:\Android\sdk\platform-tools>adb devices
List of devices attached
192.168.141.115:5556    device

  7. You can then connect the debugger to a running app that is using the USB connection

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I just wanted to take a look at this problem from the hardware point of view. Contrary to a normal USB cable, there are 5 pins in the head of USB Micro-B plug and the fifth pin has been added for indicating the mode of your device: to be a host or guest. When it is attached to the ground(as it is in OTG cable) the mobile or tablet is put into the host mode and then it provides a 5V power the the possible peripherals too. If it remains unattached, the USB is to be used for charging and (or connecting to a computer) and so it doesn't provide power. So, for doing this project, if possible, at least we need a power supply for our peripherals.

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