Importing and defining custom services in ROS 2 Foxy

edit

I have been trying to use some custom services that I created to read some sensor data in an UR5e. This service is declared in a package called custom_msgs_srvs, inside a folder called srv, with the name SensorCall.srv. This service is the used in nodes from different packages, not in that same package.

The package.xml file of the custom_msgs_srvs is:

<?xml version="1.0"?>
<?xml-model href="http://download.ros.org/schema/package_format3.xsd" schematypens="http://www.w3.org/2001/XMLSchema"?>
<package format="3">
<name>custom_msgs_srvs</name>
<version>0.0.0</version>
<description>TODO: Package description</description>
<maintainer email="pablo.arandarod@gmail.com">pablo</maintainer>
<license>TODO: License declaration</license>

<depend>rclpy</depend>

<test_depend>ament_copyright</test_depend>
<test_depend>ament_flake8</test_depend>
<test_depend>ament_pep257</test_depend>
<test_depend>python3-pytest</test_depend>

<export>
   <build_type>ament_python</build_type>
</export>
</package>

In the setup.py of the package, in the data_files section of the setup, I had the following element:

(os.path.join('share', package_name, 'srv'), ["srv/SensorCall.srv"])

I import the service in the node that I'm using it by putting from custom_msgs_srvs.srv import SensorCall.

I'm able to build everything with no problem, but when I try to execute the node that uses this service, I get the following error: ModuleNotFoundError: No module named 'custom_msgs_srvs.srv'.

----Edit:

Adding the CMakeLists.txt file:

cmake_minimum_required(VERSION 3.5)
project(custom_msg_srv)

# Default to C99
if(NOT CMAKE_C_STANDARD)
  set(CMAKE_C_STANDARD 99)
endif()

# Default to C++14
if(NOT CMAKE_CXX_STANDARD)
  set(CMAKE_CXX_STANDARD 14)
endif()

if(CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
  add_compile_options(-Wall -Wextra -Wpedantic)
endif()

# find dependencies
find_package(ament_cmake REQUIRED)
find_package(rosidl_default_generators REQUIRED)

rosidl_generate_interfaces(${PROJECT_NAME}
  "srv/SensorCall.srv"
)

if(BUILD_TESTING)
  find_package(ament_lint_auto REQUIRED)
  # the following line skips the linter which checks for copyrights
  # uncomment the line when a copyright and license is not present in all source files
  #set(ament_cmake_copyright_FOUND TRUE)
  # the following line skips cpplint (only works in a git repo)
  # uncomment the line when this package is not in a git repo
  #set(ament_cmake_cpplint_FOUND TRUE)
  ament_lint_auto_find_test_dependencies()
endif()

   ament_package()

And the package.xml:

<?xml version="1.0"?>
<?xml-model href="http://download.ros.org/schema/package_format3.xsd" schematypens="http://www.w3.org/2001/XMLSchema"?>
<package format="3">
  <name>custom_msg_srv</name>
  <version>0.0.0</version>
  <description>TODO: Package description</description>
  <maintainer email="pablo.arandarod@gmail.com">pablo</maintainer>
  <license>TODO: License declaration</license>

  <buildtool_depend>ament_cmake</buildtool_depend>

  <test_depend>ament_lint_auto</test_depend>
  <test_depend>ament_lint_common</test_depend>

  <build_depend>rosidl_default_generators</build_depend>
  <exec_depend>rosidl_default_runtime</exec_depend>
  <member_of_group>rosidl_interface_packages</member_of_group>

  <export>
    <build_type>ament_cmake</build_type>
  </export>
</package>