# 使用HandsFreeIMU on Rpi可能的Error [Imu's repo連結](https://gitee.com/HANDS-FREE/handsfree_ros_imu#/HANDS-FREE/handsfree_ros_imu/blob/master/tutorials/imu_user_manual/03_%E5%9F%BA%E7%A1%80%E6%95%99%E7%A8%8B/03_ROS%E9%A9%B1%E5%8A%A8%E5%92%8C%E5%8F%AF%E8%A7%86%E5%8C%96/doc.md) ### 1. 沒有進行source Error: ``` RLException: [handsfree_imu.launch] is neither a launch file in package [handsfree_ros_imu] nor is [handsfree_ros_imu] a launch file name The traceback for the exception was written to the log file ``` Solution: ```bash source devel/setup.bash ``` ### 2. 缺少Package Error: ``` ImportError: No module named <PACKAGE_NAME> ``` Solution: 自己查，自己下載。 ：） ### 3. 無法locate package Error: ``` Unable to locate package ros-noetic-imu-tools ``` Solution: 1. 檢查下載ROS時有無缺少指令。[document](https://wiki.ros.org/noetic/Installation/Ubuntu) 2. 直接從source code下載。[repo](https://github.com/CCNYRoboticsLab/imu_tools) ### 4. SyntaxError: invalid syntax Solution: 1. 檢查python版本 ```bash /usr/bin/python --version ``` 需為python3。 ```bash sudo ln -sf /usr/bin/python3 /usr/local/bin/python ``` 2. 你的code有bug，加油 ：）