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The Serial.begin(9600); call initializes the serial port. When you’re using the USB serial, the value doesn’t actually matter. Sometimes you’ll see Serial.begin(115200); but it really runs at the same fast speed regardless. The Serial.printlnf prints a formatted string to the debugging USB serial. Android Device, Instructions. Android 4.0 and newer (Jelly Bean). Enable the USB Debugging option under Settings > Developer options. For Android 4.2.
• • • DevTools for Beginners • • • CSS • • • Guides • • JavaScript • • • • • Guides • • Deprecated • • • • UI References and Overviews • • • • Accessibility • • Guides • • Simulate Mobile Devices • • • Guides • • • • Deprecated • • • Remote Debug Android Devices • • • • Console • • • • • • • • • • • Performance • • • • • • • • • Network • • • • • Memory • • • • • • • • • HTML • • • • • Storage and Resources • • • • Extend DevTools • • •. Technical Writer, Chrome DevTools & Lighthouse Remote debug live content on an Android device from your Windows, Mac, or Linux computer. This tutorial teaches you how to: • Set up your Android device for remote debugging, and discover it from your development machine. • Inspect and debug live content on your Android device from your development machine. • Screencast content from your Android device onto a DevTools instance on your development machine. Remote Debugging lets you inspect a page running on an Android device from your development machine.
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Step 1: Discover your Android device The workflow below works for most users. See for more help. • Open the Developer Options screen on your Android. • Select Enable USB Debugging. • On your development machine, open Chrome. • In DevTools, click the Main Menu then select More tools > Remote devices. Opening the Remote Devices tab via the Main Menu • In DevTools, open the Settings tab.
• Make sure that the Discover USB devices checkbox is enabled. The Discover USB Devices checkbox is enabled • Connect your Android device directly to your development machine using a USB cable. The first time you do this, you usually see that DevTools has detected an unknown device. If you see a green dot and the text Connected below the model name of your Android device, then DevTools has successfully established the connection to your device. The Remote Devices tab has successfully detected an unknown device that is pending authorization • If your device is showing up as Unknown, accept the Allow USB Debugging permission prompt on your Android device.
Troubleshooting: DevTools is not detecting the Android device Make sure that your hardware is set up correctly: • If you're using a USB hub, try connecting your Android device directly to your development machine instead. • Try unplugging the USB cable between your Android device and development machine, and then plugging it back in. Do it while your Android and development machine screens are unlocked. • Make sure that your USB cable works. You should be able to inspect files on your Android device from your development machine. Make sure that your software is set up correctly: • If your development machine is running Windows, try manually installing the USB drivers for your Android device. • Some combinations of Windows and Android devices (especially Samsung) require extra set up.
If you don't see the Allow USB Debugging prompt on your Android device try: • Disconnecting and then re-connecting the USB cable while DevTools is in focus on your development machine and your Android homescreen is showing. In other words, sometimes the prompt doesn't show up when your Android or development machine screens are locked. • Updating the display settings for your Android device and development machine so that they never go to sleep. • Setting Android's USB mode to PTP.