FieldTypeMismatchException with "float32" fields

[AviKenz]

Hello everybody :)

I want to control my ROS vehicle with AckermannDrive.msg but the rosbridge throws a FieldTypeMismatchException when i publish a message.

After investigation i find out that the "float32" fields in AckermannDrive are the problem. they are implicitly converted to "float" by python and the Rosbridge fails to find the matching ROS type.

"float64" fields doesnt have this problem since they are converted to "double" by python. I tested it with Vector3.msg.

Thanks in advance :)

Expected Behavior

AckermannDrive.msg should be published.

Actual Behavior

FieldTypeMismatchException is thrown.

Steps to Reproduce the Problem

1. Install ackermann_msgs package
2. Start the rosbridge_server
3. publish AckermannDrive.msg and observe the rosbridge_server console

Specifications

• ROS Version (echo $ROS_DISTRO): dashing
• OS Version (grep DISTRIB_CODENAME /etc/lsb-release): bionic
• Rosbridge Version (roscat rosbridge_server package.xml | grep '<version>'): 1.0.2
• Twisted Version (python -c 'import twisted; print twisted.version'): 17.9.0

[mvollrath]

Probably related to #493

[AviKenz]

@mvollrath thanks for your PROMPT reaction. 😊🙏

hope you will consider @travipross comment and merge the PR soon. 😊😊😊

I need it for my Masterthesis. 😃😃😃

Thanks in advance !!! 😊🙏

[mvollrath]

@AviKenz I don't intend to do that. I don't have a ROS2 environment to develop or test with, so we depend on others to work on ROS2. If you need it done you should make a PR.

[AviKenz]

the PR is created. let me know your wishes :)

[AviKenz]

PROBLEM FIXED !!! :)
Thanks again. you save me a lot of work :) :)