kRPC2 - Remote Procedure Calls for Kerbal Space Program 2

kRPC2 allows you to control Kerbal Space Program 2 from scripts running outside of the game, and comes with client libraries for many popular languages.

This is a continuation of the kRPC mod for Kerbal Space Program 1, which can be found here: https://github.com/krpc/krpc

Links for more info

• SpaceDock
• Forum thread
• Discord
• Documentation for kRPC1

Installing

Requires SpaceWarp/BepInEx to be installed.

Download the release archive and extract it into the BepInEx folder.

Current Status

The mod is a very early work in progress, so don't expect much!

Currently there is a single "service", called SpaceCenter2, with a few properties for basic telemetry.

It works with the existing kRPC client libraries (as it speaks the same protocol). However we don't yet provide generated stubs for clients like C++, C# and Java. It has only been tested using the python client, which does not require generated stubs (it can auto-generate them on connection).

When the game starts, a server is created with RPC port 50000 and Stream port 50001. There is no configuration for this yet - it is hard coded in.

Here's an example in Python, with all the currently available telemetry:

import krpc
conn = krpc.connect()
print(conn.space_center2.active_vessel.orbit.eccentricity)
print(conn.space_center2.active_vessel.orbit.apoapsis)
print(conn.space_center2.active_vessel.orbit.periapsis)

Development

This mod is in the early stages of development - there is lots to do and help is greatly appreciated!

Also check out the contribution guide (for kRPC1, but still applies here).

Building on Linux

• Install Bazel
• Create a symlink from lib/ksp2 to where you have Kerbal Space Program 2 installed, so that you have lib/ksp2/KSP_x64_Data/Managed/...
• Run bazel build //:krpc2
• The resulting plugin archive is placed in bazel-bin/krpc2-VERSION.zip

Building on Windows

Using Bazel:

• Install Bazel
  • Ensure you install MSYS2 to C:\tools\msys64 NOT the default path
  • If your user directory contains spaces, the build may not work. If this is the case, create a file called %ProgramData%/bazel.bazelrc containing the following:

    startup --output_user_root="C:/bazel-root"
    

  • If you get permissions errors related to symlinks when building you need to enable "Developer Mode".
• Put a copy of KSP2 in lib/ksp2 (so you have lib/ksp2/KSP_x64_Data/Managed/...)
• Run bazel build //:krpc2
• The resulting plugin archive is placed in bazel-bin/krpc2-VERSION.zip

Using Visual Studio:

• First you need to setup Bazel (see above for instructions). This is needed to generate a few files that are required to build the solution.
• Run bazel build //:csproj. This puts all the required files in bazel-bin/csproj/...
• Open KRPC2.sln.
• Fetch the remaining dependencies using nuget and build the project.