dsh-serial-sifarCRT

A SecureCRT-style Windows serial debug console that lives in the DeepSeek Harness (DSH) right sidebar. Configure a COM port from a dialog, connect, watch hardware debug output with ANSI colors, and type Linux commands directly into the log window — with several serial ports open side by side in tabs.

中文简介见下方「中文说明」。

_{sifarCRT connected to a board: per-line ANSI colors ([I] cyan, [D] green, [E] red, plain kernel lines white), the in-log # terminal with blinking caret, command buttons, and the keyword log search row.}

Features

• Right sidebar panel — registered as a native right-sidebar tab type (sifarCRT in the right column's guide). Opening it does not replace the built-in right-sidebar pages.
• Serial settings dialog — a gear button opens one dialog with port (auto-enumerated, with adapter descriptions), baud rate (editable, presets 9600 / 115200 / 1500000, default 1500000, valid 50–1500000), parity (default None), flow control (default 无/None), data bits and stop bits. Confirm, then Connect/Disconnect from the toolbar.
• ANSI colors — Linux ANSI SGR sequences such as ESC[0m, ESC[36;22m and ESC[7m are parsed and rendered (16 / 256 / truecolor, bold, dim, italic, underline, reverse, hidden). Colors are applied per log line: the color set at the start of a line colors that line, while lines with no ANSI (kernel/plain output) use the default text color — no bleed-over into following lines. Other cursor/clear control sequences are hidden instead of shown as garbage. A streaming parser keeps state across serial chunks.
• In-log Linux terminal — click the log pane and type directly: green # prompt with a blinking caret, Enter sends (an empty Enter sends a bare CR so the board prints its prompt), Backspace, ↑/↓ command history, Ctrl+V paste (multi-line paste sends line by line), Escape to leave the keyboard. Ctrl+C sends a single 0x03 (ETX) to interrupt a foreground program such as top; with text selected it copies instead.
• Keyword search — a search box highlights every match in the visible log (current match emphasized), with 上一个/下一个 navigation, an n/m counter and a clear button. Enter goes to the next match, Shift+Enter to the previous, Escape clears; navigating centers the match and pauses auto-follow.
• Log scrolling that stays out of the way — pressing the left mouse button in the log pauses auto-follow while data keeps arriving; releasing at the bottom resumes. Dragging the scrollbar up keeps the old view without jumping on new data; scrolling back to the bottom, pressing Enter, or clicking “已暂停 · 跟随最新” resumes.
• Command buttons — user-defined command chips that send a stored command with its own line ending; add, edit and delete them (double-click or right-click a chip). Kept per tab in localStorage.
• Copy / save — select text to copy, or copy the whole visible log; export the current tab as a plain-text .log file. Locally sent bytes are not echoed into the log — the board's own tty echo is what you see, exactly like SecureCRT.
• Multiple tabs — one independent serial session per tab, several ports open at the same time; tab configuration persists across page reloads (ports are not auto-reconnected).
• Bounded logs — the Host keeps the last 4000 entries / 8 MB per session; the panel renders the last 2000.

Requirements

• Windows (uses the in-box Windows PowerShell 5.1 + .NET System.IO.Ports; no native Node module and no compiler are needed).
• DSH ^0.2.1-rc.1 (the right-sidebar tab API of dsh 0.2.1+).
• No package dependencies, no build step.

Install

From npm (after the package is published):

dsh plugin --profile web add dsh-serial-sifarcrt

From GitHub source (works without npm):

dsh plugin --profile web add github:xf3193/dsh-serial-sifarCRT

From a local tarball:

npm pack
dsh plugin --profile web add ./dsh-serial-sifarcrt-1.0.3.tgz

Replace web with your profile name (Desktop users: install from Settings → Plugins instead). After installation, refresh the DSH page once and open the right sidebar → sifarCRT in the guide.

Uninstall: dsh plugin --profile web remove dsh-serial-sifarcrt.

How it works

Half	File	Responsibility
Host	lib/index.js	Multi-session manager, POST/GET /dsh-serial-sifarcrt/* HTTP API on ctx.webServer, bounded per-session logs
Host	lib/serial-helper.ps1	One persistent Windows PowerShell child per serial session, System.IO.Ports over NDJSON stdio
Client	lib/client.js	Right-sidebar tab-type registration, ANSI renderer, in-log terminal, settings dialog, tabs, command chips (React, no build step)

The full Host↔Client protocol contract is documented in docs/CONTRACT.md.

The plugin needs no network access. It reads/writes the local COM ports you select and stores tab/command/line-ending preferences in the page's localStorage. It spawns powershell.exe children that it owns and terminates with the plugin.

Security notes

• Installing any DSH plugin runs third-party code with your user permissions. This plugin only opens the serial ports you explicitly connect and does not send data anywhere.
• OS-limited to Windows; the Host half will not start its serial bridge on other platforms.
• The optional diagnostics endpoint writes a mount report to the OS temp directory (dsh-serial-sifarcrt-report.json) for troubleshooting; it contains no serial data.

Development

The package ships the exact files it runs — there is no bundler:

node --check lib/index.js
node --check lib/client.js
node test/host-test.mjs   # Windows + real COM ports required

Known limitations

• One port is exclusive: a COM port already held by another program cannot be opened.
• The log is a record view: ANSI colors are honoured, but cursor movement / clear-screen sequences are ignored rather than reflowing text (progress bars may appear as several lines).
• Paused scroll keeps the rendered position; when the 2000-line render cap is hit, the oldest rendered lines are dropped.
• Windows-only by design.

中文说明

DSH 右侧栏的 Windows 串口调试台（SecureCRT 风格）：

• 齿轮图标弹出串口设置（串口自动枚举、波特率可编辑默认 1500000、校验位默认 None、流控默认无、数据位/停止位），确定后连接/断开；
• 日志按 ANSI 颜色渲染，Linux # 命令行可直接在日志窗口输入（回车发送、↑↓ 历史、Ctrl+V 粘贴、Ctrl+C 中断 top 等前台程序）；
• 命令按钮栏可增删改；多标签页可同时开多个串口；
• 日志滚动跟随：按住鼠标暂停、拖滚动条回看旧日志不跳动、回车或滚到底部恢复；
• 支持复制与导出 .log；本地发送不重复回显（显示板端 tty 回显）。

安装：dsh plugin --profile web add dsh-serial-sifarcrt（或 github:xf3193/dsh-serial-sifarCRT），刷新页面后从右侧栏指南打开 sifarCRT。仅支持 Windows，需要 DSH 0.2.x。

License

MIT. lib/serial-helper.ps1 is adapted from floydc-sz/dsh-serial-debugger (MIT); see LICENSE for the full text and third-party notice.