This project enhances your hardware document scanner. Attach it to a Raspberry Pi and get your scans automatically OCR'd and uploaded to Google Drive or sent via E-Mail.
Built on top of Resin.io.
In order to allow device mounts, set a device-specific environment variable UDEV to 1.
More information: https://www.balena.io/docs/reference/base-images/base-images/#how-the-images-work-at-runtime
If you don't already have an account, go to https://resin.io and create one. Create a new application inside the dashboard and configure a new device (e.g. Raspberry Pi3).
Go to the applications page, note the git remote URL on the top right corner and add the remote to your local repository:
git remote add resin ...
Then push the code to the resin origin: git push resin.
In scripts/scanbd.conf particular actions for the scanner's buttons are defined. The sample action (works with the CANON P-215 device) is:
action scan {
filter = "start"
desc = "Canon P-215 button is pressed"
script = "/usr/src/app/scan.rb"
}
start is an event emitted by the canon_dr sane backend upon clicking the button on the scanner.
This starts the scan.rb file.
The project is specifically tailored to work with the Canon P-215 (not the P-215 II) device. While being relatively aged, it delivers good performance at an acceptable price.
In theory, any scanner that is recognized by the Linux-package sane should work. However, configuration scripts in the Dockerfile and /scripts must be changed to fit your device then. This includes the udev-rule, the scanbd configuration and enabling the correct scanner backends in the Dockerfile.
The included lcd.rb controls a HD44780 4x20 LCD, controlled via I2C. This one is tested and found to be well working.
Note that, in addition, a 3.3V <-> 5V level shifter is required for the Pi! (this one) is working well.
A suitable case to hold display and Pi can be found here
Documents can be uploaded to any UPLOAD_URL set via environment variable.
Basic Authentication credentials should be provided as part of the URI (scheme://username:password@hostname:port/path).
If you want upload scanned documents to Google Drive, create a Google Project with OAuth credentials: https://github.com/gimite/google-drive-ruby/blob/master/doc/authorization.md#command-line
After that, set the following environment variables:
GDRIVE_FOLDER_ID
GOOGLE_OAUTH_CLIENT_ID
GOOGLE_OAUTH_CLIENT_SECRET
Then go to the Resin.io dashboard, start a local shell into the container and run ./auth.sh.
This will open an interactive shell guiding you through the OAuth Token exchange process required for GDrive upload.
This command must only be run once. OAuth credentials are stored in the persistent /data volue
Set the following environment variables to have the scanned file sent as attachment:
EMAIL_ADDRESS
SMTP_HOST
SMTP_USERNAME
SMTP_PASSWORD
The container must mount devices manually. Otherwise, the resin guests do not recognize remounted hardware.
mount -t devtmpfs none /dev