Lunchtron
What it is
This package is the automatic lunch money system used by ProVeg.
All employees have a card key based on a Myfare Classic 1k RFID smartcard, and the UIDs are used to book every lunch an employeed has partaken.
The database backend is a MariaDB. Employees can top up their lunch money account in cash with an administrator, who changes the amount in a web interface.
In the future, topping up will also be possible using an automatic bank note counter.
Hardware
The "server" is a SBC, in our case a Raspberry Pi 3. Connected to it:
- via SPI: A RC522 board. See https://pimylifeup.com/raspberry-pi-rfid-rc522/
- via I2C: A 64x128 pixel OLED display for showing the current balance
- via USB: An ESC/POS receipt printer. (optional)
Software
The software consists of three parts:
- The MariaDB backend
- The lunchtron-register python script that reads the RFID-cards, changes the balance and displays it.
- The lunchtron-admin where new users and cards can be created and the amount changed by admin users.