Built my own UART Web-Serial terminal.
Drew the mockups myself, read and edited the code. HTML/CSS — 99% AI generated, JS — roughly 80%.
Key feature: zero installation, works on locked-down machines. Open tab — plug in USB-UART — go. You can browse HABR and sniff UART simultaneously in another tab.
What makes it different
Unlimited export. Real-time packet counter for the future log file — instantly see how much you've captured.
No lag under load. Batched DOM updates, handles 500k+ log lines without freezing.
JSON scripts for automation. Useful when hardware needs precise handshake timing — describe command sequences in JSON, terminal executes with proper delays.
Multiple input fields with separate send buttons. Convenient for switching between frequent commands — no copy-pasting needed.
Hex input with auto-formatting. Automatic spaces, validation — no mental byte counting.
Packet grouping by inter-arrival time. Helps visually spot message boundaries when traffic is dense.
Custom baud rates. Beyond standard 9600/115200 etc. — enter any rate your hardware supports.
Technical details
Clean interface — only what actually matters from 20 years of HW/FW/Embedded experience. Vanilla JS, zero frameworks. Not for ideological reasons, just wanted no dependencies and minimal bloat.
Web Serial API provides direct COM port access through the browser — works in Chrome/Edge on desktop.
Might come in handy for flashing Arduino, debugging firmware, sniffing hardware communication.
