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Com0Com

There is a single virtual cable created by com0com. One end of that cable is a virtual COM port connected to the UPS simulator, and the other end is another virtual COM port connected to PCSS.

ou can think of com0com like a single virtual serial cable.

That cable has two ends:

End A → Virtual COM Port 1 (connected to UPS Simulator)

End B → Virtual COM Port 2 (connected to PCSS)

It is just like plugging a real RS‑232 serial cable between:

A UPS device

A PC running PCSS

But completely virtual.

⁠

🔌 Visual Diagram (Realistic)

With com0com (development setup)

[ Microlink UPS Simulator ]

COM5

===========================

| Virtual Cable |

===========================

COM6

[ PCSS ]

✔ COM5 and COM6 are paired ✔ Data written to COM5 appears on COM6 ✔ Data written to COM6 appears on COM5

Exactly like a physical serial cable:

[ UPS ] ---- serial cable ---- [ PCSS ]

⁠

🧠 How com0com actually works (technically but simple)

It creates two virtual COM ports. Example:

CNCA0 ↔ CNCB0

Windows assigns them user‑friendly names like:

COM5 ↔ COM6

These two ports behave like two ends of a real cable.

Any software that writes to COM5 → PCSS receives it on COM6.

Any software that writes to COM6 → Simulator receives it on COM5.

There is no magic — just virtual wiring.

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