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Installation of the Chumby Software
You need a recent version of the Chumby Software Image, as described here: ChumbyImageHowto. The image contains various Ruby scripts to retrieve data from external sources and exposes it to Flash frontends. All software is installed to /mnt/storage so that it runs from the internal SD card. By convention, this is the filesystem layout for our components:
/mnt/storage/usr # where all mysmartgrid components live
/mnt/storage/usr/etc # configuration files
/mnt/storage/usr/{bin|lib|...} # the obvious unix filesystem layout
Some special files for initializing the environment:
/mnt/storage/environment.sh # shellscript to set up the environment for interactive use /mnt/storage/usr/etc/msg-init.rc # init script to hook into userhook2
Setting up the environment for internal use
If you log into the Chumby via SSH, run
$ /mnt/storage/environment.sh
to get an interactive shell with an updated environment.
Configuring the daemon
The Ruby daemon “msg-chumby-daemon” retrieves the current power consumption from your Flukso. It depends on an configuration file which you need to adjust. A template can be found in ”/mnt/storage/usr/lib/ruby/gems/1.8/gems/msg-chumby-display-0.2.0/etc/msgchumbydaemonrc” (depending on the version of the gem). Copy it to ”/mnt/storage/usr/etc” and edit it to reflect your local Flukso settings. For example:
# These are the access parameters of the CC-HPC demo flukso - replace # with your own parameters! ACCESS_TOKEN: "bb8640e074de14b9d444be7b1359707f" SENSOR_ID: "67e9fa794684e4902730be208e9d734e" FLUKSO_LOCATION_METHOD: "static" FLUKSO_HOST: "192.168.1.102" FLUKSO_PORT: "80" FLUKSO_LOCAL_ID: "d69779ec53a9323b695ee86b5328dd28"
Access token and sensor id are needed to retrieve longterm values from the website. The FLUKSO_* variables describe where the Flukso lives on the local LAN, and what sensor ID should be queried.
The Flash Widgets
The widgets for presenting the current power consumption are distributed as a part of the Ruby gem. You can find them in ”/mnt/storage/usr/lib/ruby/gems/1.8/gems/msg-chumby-display-0.2.0/widget”. To run a widget manually, follow these steps:
# Kill the running control panel /usr/chumby/scripts/stop_control_panel # Run the desired widget /usr/bin/chumbyflashplayer.x -i <path/to/widget>
Linking the software into the startup process
For demos I configure the Chumby so that the standard control panel is not started. Instead, before the control panel ist started, I run the widgets manually. You can adjust the userhook2 to do this, see http://wiki.chumby.com/mediawiki/index.php/Chumby_Rootdisk_-_RFS1_(analyzed):
