# GNU/Linux in tiny places ## small platforms for all types of shenanigans Chris McCormick <chris@mccormick.cx> --- # History ### linux.conf.au 2005 > ...developing software for the Gameboy Advance using Linux and other open source tools... ### linux.conf.au 2007 > GNU/Linux on handheld gaming devices > > (Nintendo DS, gp2x) --- # Tiny places * Termux on Android * piCore on RPi --- # Setup * Seven square * Webcam --- # Termux on Android  --- # Termux on Android * Android application * GNUish userspace * on Android Linux kernel --- # Termux on Android ## Hardware * $39 Android phone * Cheap prepaid plan  --- # Termux on Android ## Hardware * $39 Android phone * Cheap prepaid plan * Screen + camera * Speaker + Microphone * GSM data (internet) * SMS --- # Termux on Android ## Software * F-Droid * ~~GOOG~~ * Termux packages * No root --- # Termux on Android ## Scripting * Terminal UI * Shortcuts UI * ~/.shortcuts * Boot scripts * ~/.termux/boot * Package manager: * `pkg install somepackage` --- # Termux on Android ## Scripting * Capabilities? * termux-* --- # Termux on Android ## Scripting * Capabilities? * termux-* * termux-sms-* --- # Termux on Android ## Scripting * Capabilities? * termux-* * termux-sms-* * termux-camera-photo --- # Termux on Android ## Scripting * Capabilities? * termux-* * termux-sms-* * termux-camera-photo * termux-tts-speak --- # Termux on Android ## Server * SSH server * HTTP server * ~~Public IP~~ * SSH tunnel --- # piCore on RPi  --- # piCore on RPi ## Hardware * Raspberry Pi * Everything via GPIO --- # piCore on RPi ## Software * piCore == TinyCore Linux * 49M image * Read only - immutable! * packages as mount points --- # piCore on RPi ## Software * Persist changes: * filetool.sh -b * Boot scripts: * /opt/bootlocal.sh * Package manager: `tce-load -wi somepackagename` --- # piCore on RPi ## Hack * LED flash demo: * Nodejs * Python * Hats --- # piCore on RPi ## LED-over-HTTP  http://10.27.8.217:8000/led.php --- # piCore on RPi ## LED-over-SMS # 0481 300 706 --- # piCore + Termux ## World's cheapest robotics platform? --- # GNU/Linux in tiny places Chris McCormick <chris@mccormick.cx>