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, line endings, Enter Sends and echo.
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 and UDP debugging
Debug TCP Client, TCP Server and UDP traffic alongside the serial link.
TCP and UDP debuggingRFC 2217 client
Drive a remote serial port, take over its parameters, or bridge it to a local port.
RFC 2217 clientFile transfer (XMODEM / YMODEM)
Update a device from its bootloader without a second terminal program.
File transfer (XMODEM / YMODEM)Live Sync: hand the port to someone else
The four peers under the status bar's Live Sync entry: open the port to the LAN, to a browser, to another machine of yours, or to a colleague with no account.
RFC 2217 server
Share this machine's serial port over TCP, with access control and server-side checks.
RFC 2217 serverWeb remote debugging with Live Console
Debug from anywhere with live viewing, remote send and port control through Live Console.
Web remote debugging with Live ConsoleRemote serial port with Live Relay
Share a port from the site -- desktop or headless -- and drive it from elsewhere as a real port.
Remote serial port with Live RelayLive Share (invite codes)
Share one port with a colleague who has no account -- in their application or straight in a browser.
Live Share (invite codes)Diagnose and get help
Work back from a symptom, or prepare the account and support details.
Troubleshooting 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