Android User Guide

ADB connection

Enable Developer options and USB debugging, then run:

adb devices
adb shell

Common file operations:

adb push local_file /data/local/tmp/
adb pull /sdcard/file .
adb install app.apk

When multiple devices are connected:

adb -s <serial> shell

Enable the onboard Wi-Fi/Bluetooth module from Android Settings.

Useful diagnostics:

adb shell dumpsys wifi
adb shell dumpsys bluetooth_manager
adb shell rfkill list

Check inserted storage devices with:

adb shell lsblk
adb shell df -h
adb shell mount

Android normally mounts removable storage through vold. Avoid manually changing system mount points.

adb shell ip link show
adb shell ip addr show eth0
adb shell ip route
adb shell ping -c 4 8.8.8.8

After connecting HDMI, inspect the display state:

adb shell dumpsys display
adb shell dumpsys SurfaceFlinger --display-id

LCD, HDMI, and touch-to-display mapping depend on the device tree, display HAL, and Android input configuration.

adb shell input keyevent 26
adb reboot
adb reboot recovery

For reboot or wake-up failures, capture the serial log, logcat, and dmesg together.