Release v6.6.3 · alithon/serial-port-utility

6.6.3 (2026-08-18)

本地回显: 终端直通模式下，敲下的字符会在接收区原位显示，对着不回显的嵌入式设备不再是盲打。它与"显示发送"相互独立——后者显示并记录发送框发出的整帧，本地回显只按输入顺序在接收区显示按键、不写入日志；默认关闭，避免设备自身回显时每个字符出现两遍
指示灯开关: 快捷设置面板新增"指示灯"一项，可隐藏 TX/RX 与控制线指示灯，把空间让给收发区
云控制台实时通道: 云端控制台改用 WebSocket 收发命令与状态，去掉轮询间隔带来的延迟；服务端未提供该通道时自动退回原有的 HTTP 轮询

快捷设置栏可以拖得更窄: 此前它的最小宽度被最长的端口名、最长的下拉条目和最宽的标签一起撑到约 300 像素；现在超长的下拉条目在原地省略（展开列表仍显示完整内容），共用标签列也不再无限变宽，这条栏可以拖到实际需要的宽度
设置术语统一: 主窗口与多端口对话框的"选项…"改为"设置…"，终端内的连接/接收/发送设置措辞统一，设置面板中的"选项"分组按其实际内容改名为"日志行为"

等宽字体缺失导致的列错位: 收发视图指定的 Monaco 在 macOS 之外并不存在（此前只替换了 Windows 的 Consolas），缺失时会退化成比例字体，HEX 与时间戳列随之错位；现在两种字体缺失时都会替换为系统等宽字体
Microsoft Store 版本缺少在线服务: MSIX 打包此前会把账户登录、云同步与云控制台整体编译掉，商店版本因此没有这些功能，现已与直接下载的版本一致

Local echo: Terminal passthrough now echoes what you type in the receive view, so a device that never echoes back — common on embedded targets — no longer leaves you typing blind. It is separate from Display Send, which shows and logs whole frames from the send box: local echo renders keystrokes in place, in typing order, and keeps them out of the log. Off by default, since a device that does echo would otherwise double every character
Indicator lights toggle: The quick-settings panel can now hide the TX/RX and control-line indicators and give the space back to the data views
Cloud Console live channel: The cloud console now carries commands and status over a WebSocket instead of polling, removing the poll-interval delay. A backend that does not advertise the gateway keeps working on the previous HTTP polling path

The quick-settings bar drags narrower: Its minimum width used to follow the longest port name, the longest combo entry and the widest label all at once, pinning the bar near 300 pixels. Long combo entries now elide in place — the popup still shows them in full — and the shared label column stops growing, so the bar goes as narrow as you need it
Consistent settings terminology: Options… is now Settings… in the main window and the multi-port dialog, the terminal's connection, receive and send settings read consistently, and the settings panel's Options group is named Log Behavior after what it actually holds

Misaligned columns from a missing monospace font: The receive and send views name Monaco, which does not exist outside macOS — only Windows' Consolas was substituted before — so those views fell back to a proportional face and the HEX and timestamp columns drifted out of line. Both families now substitute to the system monospace font when they are missing
Online services missing from Microsoft Store builds: MSIX packaging compiled out account sign-in, cloud sync and the cloud console entirely, so the Store build shipped without them. It now matches the direct download

Platform	File
Windows 10 1809 or later, 64-bit	`serial_port_utility_*.exe`
macOS 12 or later, Apple Silicon	`SerialPortUtility-*.dmg`
Linux x86_64 (Ubuntu 22.04 or later)	`serial-port-utility-*-linux-x86_64.tar.gz`

First-launch notes for each platform — Gatekeeper on macOS, the runtime libraries on Linux —
are in the README.

SHA-256 checksums are published with every build at
alithon.com/downloads.