RPi Picture

Setup Raspberry Pi

Install Raspbian

I've only tested with RASPBIAN STRETCH WITH DESKTOP November 2017 version

Enable auto login (Optional)

sudo raspi-config

Select “Boot Options” then “Desktop/CLI” then “Console Autologin”

Compile & Install

Compile Video Shuffler for Raspberry Pi

GOARM=6 GOARCH=arm GOOS=linux go build -o rpi_pic

Install

To Install:

1. copy compiled binary to /home/pi/rpi_pic
2. copy config.yaml to /home/pi/config.yaml
3. copy video files to match BasePath in config.yaml

Startup with SYSTEMD

The best method (that I've found) to running a go program on a Raspberry Pi at startup is to use the systemd files. systemd provides a standard process for controlling what programs run when a Linux system boots up. Note that systemd is available only from the Jessie versions of Raspbian OS.

1. Create A Unit File

Create a service file at the following location:

sudo touch /lib/systemd/system/rpi_pic.service

Edit the file to look like this:

[Unit]
 Description=Video Shuffler
 After=multi-user.target

 [Service]
 Type=idle
 ExecStart=/home/pi/rpi_pic

 [Install]
 WantedBy=multi-user.target

This defines a new service called “Video Shuffler” and we are requesting that it is launched once the multi-user environment is available. The “ExecStart” parameter is used to specify the command we want to run. The “Type” is set to “idle” to ensure that the ExecStart command is run only when everything else has loaded. Note that the paths are absolute.

The permission on the unit file needs to be set to 644 :

sudo chmod 644 /lib/systemd/system/rpi_pic.service

2. Configure systemd

Now the unit file has been defined we can tell systemd to start it during the boot sequence :

sudo systemctl daemon-reload
sudo systemctl enable rpi_pic.service

Reboot the Pi and your custom service should run:

sudo reboot

update app if neded

sudo systemctl stop rpi_pic.service

recompile and copy file

sudo reboot

Config

Config options can be change by editing

Shuffle

Shuffle: true Randomize video playback. Videos are randomized on every reboot.

Autostart

Autostart: false Start plaing a video once OS has loaded. Otherwise press button to start.

BasePath

BasePath: /home/pi/Videos/Simpsons* Golang filepath.Glob pattern (https://golang.org/pkg/path/filepath/#Glob). For pattern info see: https://golang.org/pkg/path/filepath/#Match