adb cannot connect to daemon

To fix the adb permission issue on Arch Linux:

1. Install lsusb:

   sudo pacman -S usbutils

2. Find Vendor ID: Connect your Android device and run:

   lsusb

   Look for your device in the output (e.g., ID 18d1:4ee7 where 18d1 is the Vendor ID).

3. Create udev Rules:

   sudo nano /etc/udev/rules.d/51-android.rules

   Add:

   SUBSYSTEM=="usb", ATTR{idVendor}=="18d1", MODE="0666", GROUP="plugdev"

   Replace 18d1 with your Vendor ID.

4. Reload Rules:
   

   sudo udevadm control --reload-rules
   sudo udevadm trigger

5. Add User to plugdev: If plugdev doesn’t exist:

   sudo groupadd plugdev

   Then add your user:

   sudo usermod -aG plugdev $USER

6. Log out/in and Test ADB: Reconnect your device and run:

   adb devices

No more sudo needed!

Fonte https://stackoverflow.com/questions/43131020/adb-cannot-connect-to-daemon-at-tcp5037