Overview

The wally daemon is a small daemon used to control wally devices right after start. Its functionality mainly is

• display startup informations in a very early stage of a device startup
• control peripherie of the wally device (i.e. touch panel, inputs, rfid, gpio, sensors)
• display generic data locally acquired by the device
• render remote data (such as webpages) to the display
• render remote data from a middleware to the display

Features

• a plugin system (see ./plugin/myPlugin.c) which enables you to easily extend the daemon
• embedded JavaScript engine to easily control the daemon / display
• SDL2 driven (runs on macOS, Linux, Windows)
• can be run as a part of your system (i.e. seperate app, ScreenSaver etc) or as
• standalone wally device (running from flash, SDCard, USB, HDD, network)
• a dedicated wally device can be any linux ready hardware (see https://github.com/FreshXOpenSource/Firmware-builder)
• the standalone wally device firmware is highly robust to power failures / power off as in TV's etc

Projects Wally (TV,Cam,ID,Photobooth) are used in

• customers info panels driven by the wallaby backend
• static info panels
• Wally Photobooth
• CO2/Humidity sensor+display
• Identity devices

Hardware supported

• Raspberry Pi 1/2/3
• Linux devices running DRM/KMS (ATI,Nvidia, Intel, VMWare)
• Mac OS X
• (Windows, not tested)

Prerequisites

Mac :

brew install libtool libuv sdl2 sdl2_gfx sdl2_image sdl2_ttf cmake ffmpeg libcurl

Linux:

# Fedora : build SDL2 from source (for openGL/raspi support) and add the follwoing dependecies
yum -y install cmake libcurl-devel ffmpeg-devel
# Debian : (not tested)
apt-get sdl2 sdl2_gfx sdl2_image sdl2_ttf curl ffmpeg

To build wallyd run

cmake .
make && make install

To build in Linux or the firmware either

• Install packages : SDL2 SDL2-devel SDL2_image SDL2_ttf SDL2_gfx
• Required but included hashtable from https://github.com/larsendt/hashtable
• Required but included priqueue from https://github.com/mitghi/priqueue
• Required but included duktape from https://github.com/svaarala/duktape
• Required but included seaduk from https://github.com/nucleus-js/seaduk
• the sdl video plugin requires ffmpeg-devel

Commands

Built-In system commands :

   sys::setDebug
   sys::debug
   sys::sleep
   sys::loadPlugins
   sys::callback
   sys::info
   quit

Besides this, each of the plugins exports various commands into the wallyd namespace as well as into the ecmascript space See the plugins for more info