Campanella - Open-source bell management system
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README.md

Campanella - Open-source bell management system

README.md

Written by: Michele Lizzit <lizzit.it>, 21 Apr 2017
Last update: 21 Apr 2017
Version: 1.1

Campanella - Open-source bell management system
More informations are available on the project website: https://lizzit.it/campanella

Campanella is a bell management system designed for schools.
It is composed of a Raspberry PI (or any other Linux machine), and a loudspeaker or regular electric bell.
The system can be configured through a user-friendly web interface and represents a valid and accurate alternative to the expensive (and often inaccurate) timers that are often used for this purpose.
The system rings the bell and/or plays a sound on the loudspeaker according to the customizable internal schedule.
The software is very versatile and can plan different timetables: daily, weekly, monthly or custom.
The internal clock is automatically synchronized with a remote atomic clock via NTP once per day.
The system is designed for schools but is suitable for a lot more applications!
The system supports an optional HD44780 or serial LCD to display the time from the internal clock.

Campanella has been tested on the following hardware:
Raspberry PI 1 model B
Raspberry PI 3 model B

Installation procedure (EXPERIMENTAL)

Note: this procedure is HIGHLY EXPERIMENTAL and may irreversibly damage your system, please make sure you have a full backup of your system before proceeding
Note: this procedure has only been tested on Raspbian

sudo apt-get update
sudo apt-get -y install git
cd
git clone https://github.com/michelelizzit/campanella/
cd campanella
sudo ./install_script.sh

Schematic

Schematic

Pins:

Name Pin
GPIO_CAMPANELLA_PIN 7
GPIO_LED_RED_PIN 13
GPIO_LED_GREEN_PIN 16
GPIO_LED_BLUE_PIN 18
GPIO_BUTTON_PIN 15

Optional HD44780 LCD:

LCD Pin RaspberryPI Pin
RS_PIN 19
RW_PIN 21
ENABLE_PIN 3
DATA_PIN 23, 26, 22, 24

Note: Pins are numerated according to the PIN.BOARD numeration scheme

Screenshots

Screenshot1 Screenshot2 Screenshot3