tio is a simple serial device tool which features a straightforward command-line and configuration file interface to easily connect to serial TTY devices for basic I/O operations. A simpler serial device tool for talking with serial TTY devices with less focus on classic terminal/modem features and more focus on the needs of embedded developers and hackers. tio was originally created to replace screen for connecting to serial devices when used in combination with tmux.
If it's a serial TTY device, it can talk to it. Sensible defaults (115200 8n1). Supports non-standard speeds, RS-485, multiple parity options.
Builds with Meson, for some reason. In the AUR.
TMTP is a new Internet protocol combining elements of email and the web. TMTP offers a simple, reliable, free, secure, decentralized method for messaging & correspondence & notification.
Online services lack a way to directly message their customers/members. Email (SMTP etc) is unreliable, insecure, and typically transits multiple third-party hosts between sender & recipient. (Email also has other painful problems!) Text messaging (SMS) is expensive. Some sites patch this gap by building & maintaining custom phone apps—at great cost.
The client and server are open source, subject to the terms of the Mozilla Public License, v2.0.
If you're at a security conference, and you've got a ham radio license (of any class), grab your radio and set it to 146.580 simplex (no offset).
David MacKay has put the textbook he wrote online for everyone to download in a variety of formats. If you find it useful, consider buying a copy.
An archive of recorded messages and error tones from United States telephony networks. Available for online listening or free download.
pure-python-otr is just what it says on the tin - it's an implementation of the Off-The-Record messaging protocol in pure Python, meaning that it doesn't hook any libraries that aren't written in Python. Useful for adding OTR support to communications software.
An archive website about coldwar infrastructure in the US. Has documentation about communications systems and facilities.