Device Disconnects Frequently

Symptoms

• Device shows connected, then disconnects
• “Device offline” errors during workflow
• Workflow stops due to connection loss
• Intermittent “Device not found” messages

1. USB Cable Quality

The #1 cause of disconnections is cable quality:

Try This	Why
Use OEM cable	Designed for your device
Use shorter cable	Less signal degradation
Avoid extensions	Each connection point adds failure risk
Try USB 3.0 cable	Better power and data delivery

2. USB Power Management

Windows may turn off USB to save power:

1. Open Device Manager
2. Expand Universal Serial Bus controllers
3. Right-click each USB Root Hub
4. Select Properties → Power Management
5. Uncheck “Allow the computer to turn off this device to save power”
6. Repeat for all USB Root Hubs
7. Restart computer

3. Disable USB Selective Suspend

1. Open Control Panel → Power Options
2. Click Change plan settings for your active plan
3. Click Change advanced power settings
4. Expand USB settings → USB selective suspend setting
5. Set to Disabled
6. Click OK

4. Phone Settings

On your Android device:

1. Settings → Developer options
2. Enable Stay awake (screen stays on while charging)
3. Disable any battery optimization for USB connections

5. Avoid USB Hubs

• Connect directly to computer’s USB port
• If you must use a hub, use a powered USB 3.0 hub

6. Check for Interference

• Move phone away from other electronics
• Ensure cable isn’t bent or stressed
• Keep phone stationary during automation