Quick start
Install the app, find the COM port and complete the first successful send and receive.
Quick start
User Guide
Serial Port Utility User Guide
Choose one focused article for the task at hand. Each page keeps its own contents and related next steps.
User Guide
Set up a reliable connection
Start with the physical link, serial settings and workspace controls.
Serial connection parameters
Ports, baud rate, framing, flow control, Append Line Ending and Enter Sends.
Serial connection parametersQuick Settings panel
Show, hide and reorder connection, receive and send controls.
Quick Settings panelIndicator lamps and control lines
Understand TX/RX activity, modem lines, DTR/RTS control and Break.
Indicator lamps and control linesText, Hex and encodings
Readable commands, binary frames, byte checks and the GB18030/GBK/Big5 encodings.
Text, Hex and encodingsBuild repeatable workflows
Automate commands, preserve evidence and verify protocol or network traffic.
Automatic send and command lists
Loop commands, send lists line by line and reuse send history.
Automatic send and command listsLogs and long-running capture
Capture timestamped evidence and plan log rotation for long-running tests.
Logs and long-running captureCRC and Modbus checks
Check payload bytes, algorithm parameters, CRC byte order and raw responses.
CRC and Modbus checksTCP, UDP and RFC 2217 debugging
Debug TCP Client, TCP Server, UDP and RFC 2217 traffic alongside the serial link.
TCP, UDP and RFC 2217 debuggingOperate remotely and resolve issues
Use Cloud Console, diagnose symptoms or prepare account and support details.
Cloud Console
Live viewing, remote send and port control, quota behavior and privacy.
Cloud ConsoleTroubleshooting checklist
Diagnose missing ports, open failures, resets, no data and unstable links.
Troubleshooting checklistOrders, activation and support
Orders, offline activation, Cloud Sync and the support evidence checklist.
Orders, activation and support