communication between two Android devices via OTG USB cable

Asked Mar 28 '14 at 10:28

Active Mar 03 '15 at 10:11

Viewed 3,640 times

I'm trying to connect two Android devices with API 15+ via USB OTG cable.

Now I'm trying to connect to host from second Android Device. I tried with this tutorial: http://developer.android.com/guide/topics/connectivity/usb/accessory.html

But unfortunately, although I have accessory_filter like this:

<?xml version="1.0" encoding="utf-8"?>

<resources>
    <usb-accessory />
</resources>

both:

mUsbManager.getDeviceList();
mUsbManager.getAccessoryList();

return nulls on "not-host" endpoint of communication. Battery is loading, popup with "USB computer connection" is shown.

Does anybody know how to handle this?

edited Sep 24 '14 at 09:00

ligi

asked Mar 28 '14 at 10:28

Marian Przyszedł

1

I still cannot solve this issue... Is it possible to communicate between two Android devices via ADB and sockets? – Marian Przyszedł Apr 03 '14 at 15:45
1

Problem resolved: I had to force accessory mode in device from host, by sending special controlTransfer messages. – Marian Przyszedł Apr 25 '14 at 10:08
can you give some more details? – ligi May 27 '14 at 16:35
Everything You need is here :) https://code.google.com/p/android-source-browsing/source/browse/apps/cts-usb-accessory/cts-usb-accessory.c?repo=platform--cts&r=62cd9f5c10470150d5b96f4f555c539a2a670713 – Marian Przyszedł May 27 '14 at 21:38
You need this part after `printf("Found possible Android device (%x:%x) " "- attempting to switch to accessory mode...\n", vendorId, productId);` – Marian Przyszedł May 27 '14 at 22:35
here is a demo app showing how it works https://github.com/quandoo/android2android-accessory – ligi Sep 23 '14 at 13:18
1

@ligi the link is broken, can you please point me to a working version? – shakram02 Jun 27 '19 at 07:22
1

Mariran @ligi I'm working on similar project, the link you shared is broken do you have link to demo or any details on how did you got it working? – VoidStack Jan 22 '21 at 21:30
https://github.com/manishsharma004/android2android-accessory – Goran Horia Mihail Jan 29 '23 at 13:05

0 Answers0