ADB device list empty using WSL2

Question

I'm trying to debug / connect up a device for development using WSL2 (Ubuntu). I've followed steps on this post https://stackoverflow.com/a/58229368/21061 which sets up ADB on both Windows and Linux using the same ADB version.

Once I've done that however, I get an empty list of devices in the Ubuntu terminal. I've tried killing and restarting the ADB server from the Windows command line and that doesn't seem to make any difference. Is this not possible in WSL2 or is there something I'm missing?

Answer 1

This answer worked for me using WSL 2:

On Windows:

adb tcpip 5555

Then on WSL 2:

adb connect [ip device]:5555

If it's the first time, it's going to ask you for permission in your phone, make sure to check the box to always grant permission. Then restart adb and connect again:

adb kill-server
adb connect [ip device]:5555

You can get your [ip device] from: Settings > About device > Status. It has a form like: 170.100.100.100

Answer 2

Jorge's answer is fine, but beginners like me may need some more details.

[ip device] is [YOUR_PHONE_IP] address. To get the IP address of your phone, go to "Settings -> About phone -> Status -> IP address". It will probably be something like 192.168.x.y.

I did not add adb to my PATH variable - neither in Windows nor in Linux/WSL2. Instead I just downloaded the latest version for both OS's using the links below:

https://dl.google.com/android/repository/platform-tools-latest-linux.zip https://dl.google.com/android/repository/platform-tools-latest-windows.zip

Once I unzipped platform-tools I had to change directory to the unzipped folder (cd platform-tools) in both PowerShell and WSL2.

Then in PowerShell on Windows, I run .\adb tcpip 5555 in the platform-tools folder.

In WSL2 terminal, I run ./adb connect 192.168.2.199:5555 (where 192.168.2.199 was my PHONE_IP address).

The first time you connect using [YOUR_PHONE_IP] address, you will be prompted to confirm the connection. The adb might say it failed to connect while it was waiting for the confirmation. If so, run ./adb kill-server in the WSL2 terminal and then run ./adb connect [YOUR_PHONE_IP]:5555 again.

You can display the list of attached devices via .\adb devices in PowerShell and ./adb devices in WSL2.

That is all. Now you should be able to debug your phone using WSL2.