Real time data I/O for simulator (not real device)

We have some students who do not have access to a real microbit, so the sim is their only tool. Although our projects ultimately use the real microbit to drive simple vehicles, for development we want to provide students with a separate virtual environmental sim (visualization) where data is piped in from the microbit sim, processed/rendered, and updated "sensor" state is piped back into the microbit sim. At the moment, I can't figure out how to get *** real time *** data to/from the sim and an external process. Is there a simple mechanism already built-in for this? If not, is it problematic to create an extension that connects to an external process via functions, shared objects, sockets, or other means? The external process can change (HTML/JS, local, remote, native) based on what is possible.

Attached is a diagram of what we're after. The "TEXT DATA" is the pipe I would like to have. Does such a mechanism already exist?

Start by reviewing the simulator's existing extension or I/O documentation and tracing how simulator data is currently exposed. The issue does not name source files or tests, so first identify the relevant simulator entry points. Done would require a defined, documented bidirectional real-time mechanism for connecting the simulator to an external environmental process.