Simulator Setup
From here: https://docs.wpilib.org/en/stable/docs/software/wpilib-tools/robot-simulation/introduction.html
C++ robot simulation requires that a native compiler to be installed. For Windows, this would be Visual Studio 2022 version 17.9 or later (not VS Code), macOS requires Xcode 14 or later, and Linux (Ubuntu) requires the build-essential package.
Ensure the Desktop Development with C++ option is checked in the Visual Studio installer for simulation support.
Install Elastic
https://frc-elastic.gitbook.io/docs/getting-started/installation
For Windows download and run the latest elastic-setup-windows.exe on Github
Using Elastic with Simulator
Go to Settings and set IP Address Mode to localhost
Running Simulation
Click Simulate Robot Code
If you go back to Elastic you should see NetworkTables Connected. Now you can add whatever data you want from NetworkTables