Overview

HTTPS SSH

Remote - The AV Remote Control

This cleverly named application is an extremely simply web-based Audio-Video controller. It was designed to be used by my 102 year-old father who was having increasing difficulty using his typical overly-complicated multi-device multi-remote-control AV system.

There will be a post on my site (http://east.fm) soon which covers much of the application in more detail, as well as the hardware interface. Until then, are few highlights follow:

  • Runs a Raspberry Pi 3 with Raspbian Jessie 2106-03-18. Definitely overkill, but easy to develop on.

  • Extreme parsimony in choosing functionality. Only the things my father would use are included in the UI, so as to minimize clutter. This is not the remote to end all remotes and control anything.

  • DVD and VCR controls are not included in v1.0. They will be added in a subsequent release.

  • Very high contrast text and icons. The colors are indeed high-vis and were chosen to mimic the colors on the low-vision keyboard he uses on his iMac. You probably won't like the color choices, but you won't have any problems seeing them.

  • Large fonts and icons.

  • Intended to function in either landscape or portrait on tablet with 800x1280 resolution.

  • Extremely easy to go from virgin Pi and git repository to fully functional AV remote control. As close to 'turnkey' as possible.

The remainder of this document assumes the source for this application is located in $R.

Documentation

Documentation for the application is built via:

cd $R
make pdf

This will create a PDF version of this document in $R/Readme.pdf. It will also create $R/docs/setup.pdf.

setup.pdf contains very detailed documentation outlining all the steps necessary to install Raspbian on the Pi, configure Raspbian, install this application on the Pi, and configure this application.

Briefly

Although it is covered in detail by setup.pdf, these next bullet points cover the high points of the application and its deployment.

  • Downloading and installing the chosen version of Raspbian is fully automated. All that has to be typed are a few make commands.

  • After an initial ssh into the Pi at first boot, the remaining installation and configuration is handled on the development machine through the use of Fabric. This makes the developer's life easy.

Because I expected this software to be used on a daily basis, it had to be easy to maintain. E.g., if the Pi was damaged, I didn't want to have to start from scratch figuring out how to redeploy the application.

  • Similarly, I wanted it to be easy to make changes and deploy them (and rollback too!). Fabric was the key to all this. If you make code changes on the development machine, it only takes a single command (make transfer) to sync the changes to the Pi.

Requirements

Development Machine

  • OS-X or other unix-like OS, including a development environment (i.e., make is available).

  • SD card reader

  • Working Python environment with the following packages installed:

    • Fabric

    • pandoc

  • On same subnet as the Pi

  • rsync executable

Deployment Target

  • Raspberry Pi 3 (suspect any Pi would be fine)

  • Raspbian Jessie

  • 32GB SD card

  • On same subnet as development machine

  • Live internet connection (only during installation)

Notes

This runs Flask's own webserver, which is fine for a small application on an isolated network with one concurrent user. This application isn't intended to be exposed live to the internet; doing so will almost certainly be unpleasant.