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Troubleshooting Common ADB Connection Issues

โดย : Judith เมื่อวันที่ : พฤหัสบดี ที่ 18 เดือน กันยายน พ.ศ.2568

When working with Android SDK Platform Tools, you may encounter communication failures that hinder development. These problems can stem from a variety of sources, but are usually quick to correct once you know the root cause. The most common issue is when ADB fails to recognize your connected device. Start by checking that ADB debugging is activated on your Android device. You can find this setting under Advanced Development Settings in the device_s settings menu. If Developer options is not visible, you can enable it by navigating to About phone and clicking the build number seven consecutive times. Next, verify that the USB cable you are using is capable of data transmission. Some cables are intended only for power delivery and will fail to establish a connection. Try testing with an alternative cable or test the current one with a second Android phone to confirm it works. Also, ensure the device is connected bypassing any intermediaries rather than through a USB hub, as hubs can cause signal degradation. If the device still does not appear when you run adb shell devices, check whether the proper USB drivers are installed on your computer. On Windows 10, you might need to download and install the device-specific drivers from the official support page. On Ventura and Linux, the drivers are usually handled seamlessly, but you may still need to restart the ADB server. To do this, run adb kill-server followed by adb start-server in your command prompt. Sometimes, the ADB server itself becomes unresponsive. If you see devices listed as not trusted or no devices at all, try resetting both endpoints. You can also clear the ADB authorization by going to Developer Settings on your device and selecting Clear ADB Keys, then plugging it back in and accepting the prompt to enable debugging. Network connections can also be a source of trouble. If you are connecting via TCP, make sure both the device and the computer are on the matching LAN. Use adb tcpip --port 5555 to switch the device to TCP mode, then connect using adb connect [IP_ADDRESS]. If the connection fails, check your network security rules as they may be blocking port 5555. Lastly, always ensure that your ADB version is modern. Outdated versions may not support newer Android devices that cause frequent disconnections. Download the most recent SDK tools from the Android Developers portal and replace the old files in your Android SDK path. By following these steps, most ADB connection problems can be resolved quickly. Always note down diagnostic outputs you see, as they can provide essential context for resolving <a href="https://ctpedia.org/index.php/Best_USB_Hubs_For_Large-Scale_Mobile_Proxy_Setups">more info on hackmd</a> complex issues. 

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