Missing Newtonsoft.Json when setting up ROS# with Unity

[petpetpeter]

Here is my question:

I try setting up rossharp on unity by cloning the main branch and found this problem

So I check the external library on my previous rossharp project a month ago there is Newtonsoft.Json there

Copying these libraries to the external folder in the new project could fix the problem, but there should be a more proper way to fix this so I report a bug here.

• My OS is: Windows10
• My Unity Version is: 2019.4.18f1

[MartinBischoff]

Thank you @petpetpeter for this report and this fix. @ all using an older Unity version: you need to add the Newtonsoft.Json dll as described above to resolve the errors mentioned above. More recent Unity versions already contain a Newtonsoft.Json dll . If we add the same library a second time in the project's asset folder errors occur. This is the reason why we removed it from the master in commit https://github.com/siemens/ros-sharp/commit/6e91309b2447c0919d3dabaa0650bb71e3e490dd.

[MartinBischoff]

further info on Newtonsoft.Json in Unity:

• https://docs.unity3d.com/Packages/com.unity.nuget.newtonsoft-json@2.0/manual/index.html
• https://forum.unity.com/threads/newtonsoft-json-package.843220/