Environment
- Turtlebot3 Waffle
- Intel NUC i5
- Ubuntu 18.04
- ROS2 Crystal
Goal
I am replacing the Joule on my Turtlebot3 Waffle with a NUC. I want more capability on the Waffle making it on par with typical Turtlebot2 systems. Furthermore, the Joule is no longer supported. I know that the NUC is not an officially supported either. I am posting this question as a benefit to others that may be interested in Intel Core enabled solutions.
Details
ROS2 installed fine. The examples in the "Using colcon to build package" tutorial built and the publish/subscribe example ran well.
I ran into trouble with the ROS2 Turtlebot3 install Robotis eManual Section 15. In particular see Section 15.1.1.3 "Install Turtlebot3 ROS2 Packages".
colcon build --symlink-install fails. I get the following error during the cv_bridge build. See a detailed log at this message end.
ModuleNotFoundError: No module named 'numpy'
apt tells me python-numpy is not installed. So I install it.
$ apt list --installed python-numpy
Listing... Done
$ sudo apt install python-numpy
$ apt list --installed python-numpy
Listing... Done
python-numpy/bionic,now 1:1.13.3-2ubuntu1 amd64 [installed]
Furthermore, a python example program using numpy now executes properly. It didn't run before.
I still get the ModuleNotFoundError: No module named 'numpy' error.
Question
How do I fix this?
Complete colcon build log
$ colcon build --symlink-install
Starting >>> nav2_common
Starting >>> nav_2d_msgs
Starting >>> angles
Starting >>> behaviortree_cpp
Finished <<< nav2_common [1.54s]
Starting >>> nav2_msgs
Finished <<< angles [3.70s]
Starting >>> nav2_voxel_grid
[Processing: behaviortree_cpp, nav2_msgs, nav2_voxel_grid, nav_2d_msgs]
Finished <<< nav2_voxel_grid [43.7s]
Starting >>> cv_bridge
--- stderr: cv_bridge
Traceback (most recent call last):
File "<string>", line 1, in <module>
ModuleNotFoundError: No module named 'numpy'
CMake Error at src/CMakeLists.txt:27 (message):
Could not determine the NumPy include directory, verify that NumPy was
installed correctly.
---
Failed <<< cv_bridge [ Exited with code 1 ]
Aborted <<< nav_2d_msgs
Aborted <<< behaviortree_cpp
Aborted <<< nav2_msgs
Summary: 3 packages finished [4min 35s]
1 package failed: cv_bridge
3 packages aborted: behaviortree_cpp nav2_msgs nav_2d_msgs
1 package had stderr output: cv_bridge
48 packages not processed
Originally posted by Ed C. on ROS Answers with karma: 38 on 2019-07-13
Post score: 0
Original comments
Comment by ahendrix on 2019-07-13:
Perhaps you need the python3 version of numpy?
Comment by Ed C. on 2019-07-13:
Thanks. That was it.