Adb auto connect via wireless debugging(without USB cable) for android 11+

adb-auto-connect

#!/bin/bash
# Auto-connect to Android device and optionally launch scrcpy
# Usage: adb-auto-connect [--scrcpy]

DEVICE_IP="192.168.1.xxx"
PORTS=(5555 38000 39000 40000 41000 42000 43000 44000 45000)
SCRCPY=false

if [[ "${1:-}" == "--scrcpy" ]]; then
    SCRCPY=true
fi

# Check if already connected
if adb devices 2>/dev/null | grep -q "$DEVICE_IP"; then
    CONNECTED=$(adb devices | grep "$DEVICE_IP" | awk '{print $1}')
    echo "Already connected: $CONNECTED"
    if $SCRCPY; then
        exec scrcpy -s "$CONNECTED"
    fi
    exit 0
fi

echo "Trying ${DEVICE_IP}..."

# Try port 5555 first (adb tcpip mode)
if nc -z -w1 "$DEVICE_IP" 5555 2>/dev/null; then
    echo "Connecting to ${DEVICE_IP}:5555..."
    adb connect "${DEVICE_IP}:5555"
    if $SCRCPY; then
        exec scrcpy -s "${DEVICE_IP}:5555"
    fi
    exit 0
fi

# Scan for wireless debugging port (Android 11+ uses random high ports)
echo "Port 5555 not available. Scanning for wireless debugging port..."
PORT=$(adb mdns services 2>/dev/null | grep "adb-tls-connect" | grep -oE '[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+:[0-9]+' | head -1)

if [[ -n "$PORT" ]]; then
    echo "Found via adb mdns: $PORT"
    adb connect "$PORT"
    if $SCRCPY; then
        exec scrcpy -s "$PORT"
    fi
    exit 0
fi

# Brute scan common high port range for wireless debugging
echo "Scanning high ports on ${DEVICE_IP}..."
FOUND_PORT=""
for port in $(seq 37000 45000); do
    if nc -z -w0 "$DEVICE_IP" "$port" 2>/dev/null; then
        FOUND_PORT="$port"
        break
    fi
done

if [[ -n "$FOUND_PORT" ]]; then
    echo "Found open port: ${DEVICE_IP}:${FOUND_PORT}"
    adb connect "${DEVICE_IP}:${FOUND_PORT}"
    if $SCRCPY; then
        exec scrcpy -s "${DEVICE_IP}:${FOUND_PORT}"
    fi
    exit 0
fi

echo "No ADB port found on ${DEVICE_IP}."
echo "Make sure either:"
echo "  - 'Wireless debugging' is ON (Developer Options), or"
echo "  - Run 'adb tcpip 5555' while USB is connected"
exit 1