Creating and Using Custom Messages

[Hateley123]

I downloaded your repository and I am able to build the packages. However, the system fails to recognize the new msg that I created.

The message (RFIDTagMsgs.msg):
float64 freq1_phase
float64 freq2_phase
float64 ant1_phase
float64 ant2_phase
float64 ant3_phase

In my Cmakelist I have:
set(ROSIDL_GENERATE_CSHARP ON CACHE BOOL "Generate C# messages")

Define message files

set(MSG_FILES
"msg/RFIDTagMsgs.msg"
)

Generate message interfaces, including C#

rosidl_generate_interfaces(${PROJECT_NAME}
${MSG_FILES}
DEPENDENCIES std_msgs
)

and in my package.xml I have:

rfid_ros_package 0.0.0 TODO: Package description root TODO: License declaration

<buildtool_depend>ament_cmake</buildtool_depend>
<buildtool_depend>ament_cmake_export_assemblies</buildtool_depend>
<buildtool_depend>dotnet_cmake_module</buildtool_depend>
<buildtool_depend>rcldotnet_common</buildtool_depend>
<buildtool_export_depend>rosidl_cmake</buildtool_export_depend>

<exec_depend>rmw_implementation</exec_depend>
<exec_depend>rmw_implementation_cmake</exec_depend>
<exec_depend>rosidl_generator_c</exec_depend>
<exec_depend>rosidl_parser</exec_depend>

<exec_depend>dotnet</exec_depend>
<exec_depend>rcldotnet</exec_depend>
<exec_depend>rcl</exec_depend>
<exec_depend>rcl_interfaces</exec_depend>
<exec_depend>rcl_action</exec_depend>
<exec_depend>action_msgs</exec_depend>
<exec_depend>builtin_interfaces</exec_depend>
<exec_depend>unique_identifier_msgs</exec_depend>
<exec_depend>rosidl_default_runtime</exec_depend>
<test_depend>ament_lint_auto</test_depend>
<test_depend>ament_lint_common</test_depend>

<build_depend>rmw_implementation_cmake</build_depend>
<build_depend>rcl</build_depend>
<build_depend>rcl_interfaces</build_depend>
<build_depend>rcl_action</build_depend>
<build_depend>rmw</build_depend>
<build_depend>action_msgs</build_depend>
<build_depend>builtin_interfaces</build_depend>
<build_depend>unique_identifier_msgs</build_depend>
<build_depend>rosdil_default_generators</build_depend>

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

std_msgs
rclcpp

<member_of_group>rosidl_interface_packages</member_of_group>

ament_cmake

and in my main cs file I have:
using RFIDTagMsgs.Msg.RFIDTagMsgs;
and have used using RFIDTagMsgs.Msg; and using RFIDTagMsg = RFIDTagMsgs.Msg.RFIDTagMsgs;

but no matter what i do it does not let me use the new msg file. I have gone through your repository and it does not seem like you use custom messages. do you know how I can get this to work?

[Hateley123]

I am using ubuntu 22 and ros2 btw