browser-based ansi serial console, and perl serial connector

[gitcnd]

Some boards use DTR/RTS for flow control, others use it for firmware reset/programming - so there's no "one terminal for all" that's easy... so I wrote one based on https://github.com/xtermjs - a demo is at: https://chrisdrake.com/xterm.html (prefer you took a copy to use on your own site - mine just to demo it working). Set both for boards that lock up when hardware flow control is not use (ESP32-S2), clear both for boards that use it for reset/gpio (ESP32Cam, espressif esp32 programming connector, etc). Toggle RTS on the latter to hardware-reset them:

Here's also a perl connector for serial, so you can use your existing workflow and terminal to quickly connect to boards from your linux/wsl1/mac commandline: https://github.com/gitcnd/mcu_serial