Unreal Engine Remote Execution

NodeJS module for connecting to Unreal Engine and running Python commands/code.

Setup

1. Enable the Unreal Engine Plugin "Python Editor Script Plugin" in your project
2. In Project Settings → Plugins → Python, tick the "Enable Remote Execution?" checkbox

Linux

Linux requires additional setup before use

1. Allow multicast traffic between local processes

   sudo ip route add 239.0.0.1 dev lo

   With 239.0.0.1 being the IP configured as the "Multicast Group Endpoint" in Unreal Engine's Python project settings.

   [!NOTE] This route is not persistent and must be re-run after each reboot.

2. Set Unreal's Multicast Bind Address to 0.0.0.0:
   Project Settings → Plugins → Python → Python Remote Execution → Advanced → Multicast Bind Address → 0.0.0.0

Examples

In this API Unreal Engine instances are referred to as "nodes".

Running a command on the first remote node found

import { RemoteExecution } from 'unreal-remote-execution';

const remoteExecution = new RemoteExecution();

// Start the remote execution server
remoteExecution.start();

// This will start searching for nodes and return the first node found, it'll send a new ping every 1 second, with a timeout of 5 seconds
remoteExecution.getFirstRemoteNode(1000, 5000).then(
    async (node) => {
        // Once a node is found, open a command connection
        // this will allow us to run commands on that node
        await remoteExecution.openCommandConnection(node);
        
        // Execute a command
        const result = await remoteExecution.runCommand('print("Hello World")');
        console.log(result);

        // Close down the servers & connections once we are done
        remoteExecution.stop();
    },
    () => {
        console.log("No remote nodes found!");
        remoteExecution.stop();
    }
);

Connecting to a specific Unreal Engine instance

import { RemoteExecution } from 'unreal-remote-execution';

const remoteExecution = new RemoteExecution();
remoteExecution.start();

// Add a listener that is called when a node is found
remoteExecution.events.addEventListener('nodeFound', async (node) => {
    // Check if e.g. the project name matches
    if (node.data.project_name === "My Project") {
        await remoteExecution.openCommandConnection(node);
        
        // code continues here...
    }
});

// Start searching for remote nodes
remoteExecution.startSearchingForNodes();

*This is a third-party module and is not associated with Epic Games or Unreal Engine in any way.