Small always-on-top desktop widget that lists every connected COM port at a glance — port name, VID/PID, how long it has been plugged in, whether it is open or free, plus a flash animation as ports come and go. Double-clicking a port opens a built-in serial terminal for it.
Useful during embedded development when you want to watch ports enumerate and talk to them without keeping Device Manager and a separate terminal program open.
- Live port list — port name, VID:PID, age, a colour status dot (green = free, red = open by another process, yellow = just appeared), open/free status, serial number / hub location, and the Windows description.
- Flash on connect — a newly appeared port flashes amber and fades back over the highlight duration; ports present at startup don't flash.
- Removed ports linger — unplugged ports stay listed in red and fade out for a configurable time so you can see what just disappeared.
- Custom names — give any device a memorable label, keyed by VID:PID:serial so it sticks across re-plugs.
- Stays out of the way — always-on-top (optionally dropped after idle), optional move-to-back on idle, and an opacity fade when you're not interacting with it. Transparency is adjustable.
- Per-device memory — names, serial settings, and terminal window size/position are saved per device in
settings.json.
- Open a terminal — click a row's Status cell. If the port is busy or the device is unplugged, the row shows waiting and the terminal opens automatically as soon as the port is free again.
- Edit a custom name — double-click the Serial / Loc cell, type a name, and press Enter (Esc cancels). Clear the text to remove the name.
- Edit settings — click the ⚙ button in the title bar. The dialog covers highlight duration, how long removed ports stay, always-on-top and its idle drop, move-to-back on idle, the fade-after-idle delay (0 = fade immediately on leaving), and live-preview sliders for window and terminal transparency.
A serial terminal opens in its own borderless window per device. Each remembers its own size and position.
- Send / receive — RX and TX are colour-coded in the output pane; type in the input line and press Enter to send, with a configurable line ending.
- Smart auto-scroll — follows new data only when you're already at the bottom, so scrolling up to read holds your position.
- Connect / Disconnect — toggle the connection from the title bar; the row's status reflects the live connection state.
- Reconnect on unplug — optionally keeps the terminal open when the device is removed and reconnects automatically when it returns.
- Modem lines — optional title-bar RTS / DTR buttons to drive those outputs (green = asserted), plus live CTS / DSR / DCD indicators. Choose None, RTS/DTR (controls only), or Full (controls + indicators) per device.
- Pin (📌) — toggle the terminal's always-on-top independently of the main window.
- Clear the output, or open the ⚙ port settings.
- Resizable from any edge or corner; drag the title bar to move.
Open the terminal's ⚙ to set baud, data bits, parity, stop bits, line ending, signals (None / RTS/DTR / Full), and reconnect-on-unplug. Settings are saved per device (VID:PID:serial) and applied immediately on save.