brewpi-backup

Backup brewlog history from brewpi and create graphs for offline viewing.

Dependencies

• Dropbox account (a free account is fine)

Notes

1. Assume logged in as user pi with default home at /home/pi and default brewpi webdir at /var/www/html.
2. Tested on Raspbery Pi 3 running Raspbian (jessie) LITE
3. Per-Day Fermentation Rate requires a Tilt Hydrometer. Backup HTML files should still work fine but the fermentation rates will be empty.

Installation

Create a Dropbox app

1. Go to https://www.dropbox.com/developers/apps
2. Click Create app
3. Choose an API: Dropbox API
4. Access type: App folder
5. App name: YOUR_APP_NAME
   • this is a freetext field, type whatever name you like here
   • The name you provide here will appear as a folder in the Apps directory of your Dropbox
   • Files backed up by the sync process below will be stored in this folder
6. Click the Create app button
7. The new app will be created and will load the Settings screen.
8. Look for the section titled Generated access token and click the Generate button.
9. Copy the access token

Save dropbox access token on the raspberry pi

1. Login to raspberry pi as user pi
2. Save the access token to /home/pi/.dropbox_token
   • echo "DROPBOX-ACCESS-TOKEN" > /home/pi/.dropbox_token
     • NOTE: Replace the text DROPBOX-ACCESS-TOKEN with the actual token generated above

Install brewpi-backup repo

1. cd $HOME
2. git clone https://github.com/andylytical/brewpi-backup.git
3. /home/pi/brewpi-backup/install.sh
4. Logout and login again (this is required to reload user environment with modifications made during install)

Usage

Create static html pages for each brewlog

1. python3 /home/pi/brewpi-backup/mk_brewlog_graphs.py

Sync static html pages (and supporting files) to Dropbox

1. python3 /home/pi/brewpi-backup/sync.py
2. The static HTML pages (created above) should now be sync'd to the folder in Dropbox/Apps/YOUR_APP_NAME
3. Double click one of the HTML pages to view it in your default web browser

Automation

1. Create a cron job for running each command above
   1. crontab -e
      1. 01 */4 * * * python3 /home/pi/brewpi-backup/mk_brewlog_graphs.py
      2. 12 */4 * * * python3 /home/pi/brewpi-backup/sync.py