Documentation

Serial Port Utility Documentation

Start with a working connection, follow a real-world scenario or jump directly to the feature and troubleshooting reference.

Quick startBrowse scenariosTroubleshooting
Choose a path

Get to the right answer without reading the whole manual.

These three paths cover first connection, task-based setup and symptom-based diagnosis.

Quick start

Confirm the driver, cable, serial parameters and first successful send.

Start here

Serial, network and remote support scenarios

Follow a complete topology and configuration path for a real integration or support task.

Browse scenarios

Troubleshooting

Diagnose missing ports, open failures, garbled data and unstable links.

Diagnose a problem
Typical scenarios

Put serial tools to work in real integration and support workflows.

Each guide starts from the desired outcome, shows the topology and ends with observable success checks.

View all scenarios

Expose a serial device over TCP

Let a remote application access an RS-232 or RS-485 device through a TCP server.

  1. Serial device
  2. SPU TCP Server
  3. Remote app
Open scenario

Connect an isolated site outward

Use an outbound TCP client when the device site cannot accept inbound connections.

  1. Serial device
  2. SPU TCP Client
  3. Central server
Open scenario

Monitor a serial conversation inline

Capture both directions between an existing host and device without changing the protocol.

  1. Existing host
  2. SPU bridge
  3. Serial device
Open scenario

Forward serial telemetry over UDP

Turn NMEA or sensor messages into correctly framed UDP datagrams for a LAN collector.

  1. Sensor
  2. SPU framing
  3. UDP collector
Open scenario

Poll a Modbus RTU device reliably

Build a repeatable request, verify CRC and separate timeout from framing failures.

  1. SPU poll command
  2. RS-485 adapter
  3. Modbus device
Open scenario

Capture an intermittent fault overnight

Record timestamped traffic with bounded files and preserve a useful incident window.

  1. Serial link
  2. SPU logging
  3. Rotated evidence files
Open scenario

Assist an on-site serial session remotely

Inspect live traffic in a browser and grant send or port control only when needed.

  1. On-site SPU
  2. Cloud Console
  3. Remote engineer
Open scenario
Feature reference

Browse by product area.

Open a focused article now, or use the User Guide index to browse all setup, workflow and support topics.

Connection and terminal

Serial parameters, Quick Settings, control lines, Text and Hex workflows.

Read connection guides

Automation and protocols

Loop send, logging, CRC, Modbus, TCP, UDP and RFC 2217 debugging.

Read workflow guides

Help and support

Orders, activation, Cloud Sync and the information to prepare for support.

Open support guidance