❓ Frequently Asked Questions (FAQ)

Got questions? Here are the most common ones we've encountered while developing and running the LIMO Pro + MyCobot + YOLO system.

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⚡ Quick Answers

Object Detection

Q: YOLO is not detecting objects — what should I check?
A:

• Confirm camera topics are active:

  ros2 topic list | grep camera

• Check YOLO weights path in object_detector.py matches your trained model.
• Ensure lighting is adequate and the object is within depth sensor range.

Navigation Issues

Q: Robot spins in place or doesn't move to goal.
A:

• Make sure pose_setter published the initial pose (check logs).
• Verify nav2_params.yaml matches your map.
• Reset AMCL and re-run navigation:

  ros2 lifecycle set /amcl configure
  ros2 lifecycle set /amcl activate

Arm Control

Q: MyCobot is not responding.
A:

• Ensure Wi-Fi is connected to:

  SSID: MyCobotWiFi2.4G
  PASS: mycobot123

• Run IP detection logic from full_system.launch.py to confirm the arm is found.
• Power cycle the arm if connection fails.

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💡 Common Problems & Solutions

Problem	Possible Cause	Quick Fix
Nav2 server not ready	Launch order issue	Increase delay in full_system.launch.py TimerAction
Pick/Drop timeout	Arm motion blocked or Wi-Fi lag	Clear workspace, re-run arm node with stable signal
Map drift	Poor AMCL initialization	Re-publish /initialpose from pose_setter.py
YOLO lag	Low GPU/CPU resources	Lower image resolution or increase confidence threshold

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🌍 Community Resources

• ROS2 Documentation
• Nav2 Navigation Stack
• Ultralytics YOLO Docs
• MyCobot Developer Hub

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📣 Where to Ask for Help

• GitHub Discussions: Project Discussion Board
• Discord Server: Join our real-time chat here
• ROS Discourse: ROS Community Forum

Pro Tip

When asking for help, always share:

• ROS2 version (ros2 --version)
• Full launch command used
• Relevant log output (error + 10 lines before it)

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Next: Developer Guide → Contributing