Android Things - How do I connect to my Raspberry Pi when I don't know the IP address

Question

I have successfully managed to install the Android Things Dev Preview onto my Raspberry Pi.

I have a problem though. When I first started installing my own applications I was able to connect to the Raspberry Pi through Ethernet, because it displayed the IP address on the TV when I booted up the Raspberry Pi.

Now because I have the Raspberry Pi already running an application, when I boot it up, it is automatically booting into my application without showing the initial screen with the IP address (and I forgot my IP address 🤔).

Is there an easy way to get the IP address of the Raspberry Pi, or connect to it when I don't know the IP address? Even a command to get a list of all available ADB devices on the network would help.

It would be great if when connected to a certain Wi-Fi, you could run something like:

adb network devices

Which could give a list of ADB devices on the network you are on.

Answer 1

The Raspberry PI Automatically broadcasts Android.local and should resolve to the IP address assigned to your Pi on port 5555. Running the following:

adb connect Android.local

The command above is effectively the same as running:

adb connect <ip-address>:5555

Note: This will only work if your host platform supports multicast DNS service discovery.

This information was found in the documentation here by step 7 https://developer.android.com/things/hardware/raspberrypi.html

Answer 2

You can scan your network for points with ports 5555/5554 open, for example,

nmap -p 5555,5554 192.168.0.2-100

will scan in range 2-100 for any IP addresses with those ports open.