Operational diagnosis
- Identify electrical interface, cable pinout and control lines.
- Record baud, parity, data/stop bits and flow control.
- Compare COM enumeration and drivers before and after OS or USB-adapter change.
- Capture timestamped traffic to preserve known device behavior.
- Separate valid protocol responses from corrupt transport.
Repair or replace
We can stabilize the existing application, qualify a supported adapter/gateway, or build replacement software from verified exchanges. Useful evidence includes the old PC image, executable/configuration, cables, manuals, screenshots, error logs and a known-good device sequence.
See RS232 development, device integration, traffic capture and the serial pillar.