Find Android devices in Wifi network

[bichlepa]

Is it possible to find Android devices in a Wifi network?

I thought it might be possible with a broadcast address, but it doesn't work.
I get an answer if I open http://192.168.1.101:8080/wotablet. But not http://192.168.1.255:8080/wotablet. Trying out all possible IP addresses is not practicable because it takes several seconds before the answer comes that the page is not reachable.

I'm about to create a solution to exchange the clipboard between the computer and an android device. It works but only if I know the IP Address of the android device.

[ZSasha]

how about using an external place (like dropbox or gdrive) so Android, once your flow has been started started, would "register" itself by putting its own IP address in a text file.
Then PC app could query the same location, read the file to get Android's IP address and then try to contact that address directly?

[Bluscre]

This would indeed be nice,

Btw @martin why is stopfli.com a thing?

[Martin]

Hi,

You can ignore the stopfli-site. It was temporarily used for a few tests and I forgot to remove it. It should stop working soon...

Regards,
Martin

[Bluscre]

I use this now (works without root on my device:

Code: Select all

// Execute Command: cat /proc/net/arp

stdout = split(stdout, "\n");
header = removeElement(stdout, 0);
wifi_devices = newMap();
for (i in stdout)
{
   split = split(i, "\\s+");
   ip = split[0];
   wifi_devices[ip] = newMapFromValues(
   "type", split[1],
   "flags", split[2],
   "mac", split[3],
   "mask", split[4],
   "adapter", split[5]
   );
}

Thanks for the info martin, i almost thought i entered my login on a scam site for a second xd

[Desmanto]

But arp only contain the devices address that have communicate to our phone within last several minutes. And sometimes it doesn't even have the devices address I just ping.

Still have to use ping to all possible address and parse the result to grep only for the reply one.