wadb

Connect an Android 11+ device over ADB Wi-Fi by scanning a QR code from your terminal.

Same protocol as Android Studio's Pair device using Wi-Fi, but without launching the IDE — just run wadb, scan, done.

Install

Requires Go (see go.mod for the minimum version) and adb from Android platform-tools.

go install github.com/lindevhard/wadb@latest

Or build from a clone:

git clone https://github.com/LinDevHard/wadb && cd wadb
go build -o wadb .

Usage

wadb

A QR code prints in the terminal. On your phone open Settings → Developer options → Wireless debugging → Pair device with QR code and scan it. wadb will pair and connect automatically, then exit.

Both the phone and the host must be on the same Wi-Fi network (no AP isolation between clients), and Wireless debugging must be enabled in Developer options.

How it works

1. wadb locates the local adb binary.
2. It generates a single-use service name (studio-<random>) and password, then renders them as a QR code with payload WIFI:T:ADB;S:...;P:...;; — the same format Android Studio uses.
3. When the phone scans the QR, it advertises _adb-tls-pairing._tcp via mDNS. wadb matches the announce by instance name and runs adb pair.
4. After pairing succeeds, the phone advertises _adb-tls-connect._tcp. wadb runs adb connect against it and prints the result.

The actual TLS pairing handshake is handled by adb pair; wadb only orchestrates discovery and credential generation.

adb discovery

wadb searches for adb in this order and uses the first match:

1. $ANDROID_HOME/platform-tools/adb
2. $ANDROID_SDK_ROOT/platform-tools/adb
3. ~/Library/Android/sdk/platform-tools/adb (macOS Android Studio default)
4. ~/Android/Sdk/platform-tools/adb (Linux default)
5. adb on $PATH (e.g. Homebrew android-platform-tools)
6. /opt/homebrew/share/android-commandlinetools/platform-tools/adb

If none match, set ANDROID_HOME or install platform-tools.

Troubleshooting

Symptom	Likely cause
"did not see device announce within 2m"	Phone could not reach the host over mDNS. Check same Wi-Fi subnet, no AP isolation, firewall not blocking UDP 5353.
adb pair fails immediately	Stale daemon. Run adb kill-server and retry.
Connect timeout after a successful pair	Some Android builds delay the connect announce. Re-run wadb, or run adb connect <ip>:<port> manually once Wireless debugging shows the device's port.

Platform support

Tested on macOS. Linux should work as-is. Windows adb discovery is partially implemented but unverified — PRs welcome.

Contributing

See CONTRIBUTING.md and the Code of Conduct.

License

MIT