Quick start
Install the app, find the COM port and complete the first successful send and receive.
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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 encodingsAutomatic 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 server
Share this machine's serial port over TCP, with access control and server-side checks.
RFC 2217 serverRFC 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)Web remote debugging with Cloud Console
Debug from anywhere with live viewing, remote send and port control through Cloud Console.
Web remote debugging with 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 supportChoosing a remote access path
RFC 2217, transparent TCP or Cloud Console -- what each requires and what each can do.
Choosing a remote access pathDebug a serial port from anywhere on the Web
Use Cloud Console across locations and NAT without routing directly to the site or opening an inbound TCP port.
Debug a serial port from anywhere on the WebConnect directly with RFC 2217
Reach a serial server directly over a LAN or VPN and control its serial parameters as well as its data.
Connect directly with RFC 2217Connect an isolated site outward
Use an outbound TCP client when the device site cannot accept inbound connections.
Connect an isolated site outwardMonitor a serial conversation inline
Capture both directions between an existing host and device without changing the protocol.
Monitor a serial conversation inlineForward serial telemetry over UDP
Turn NMEA or sensor messages into correctly framed UDP datagrams for a LAN collector.
Forward serial telemetry over UDPPoll a Modbus RTU device reliably
Build a repeatable request, verify CRC and separate timeout from framing failures.
Poll a Modbus RTU device reliablyCapture an intermittent fault overnight
Record timestamped traffic with bounded files and preserve a useful incident window.
Capture an intermittent fault overnightUpdate device firmware over serial
Send an image to a bootloader with YMODEM, locally or through a device server.
Update device firmware over serial