We have a school management system which is built on ruby on rails. It has 
an attendance system where attendance can be marked manually and SMS 
notifications are sent to parents for absent students.. Every student 
profile has a unique Hardware ID which is linked to their student ID and 
other information.

Our hardware devices will be transmit this hardware ID to a set port on the 
server from where it has to be read to get student information and then 
mark attendance accordingly.

Sample ruby code to communicate with the database to get student 
information from hardware ID and to mark attendance will be provided.

You have to develop a plugin for the student management system which does 
all this and also sends SMS for in and out time of the students depending 
on the time of the hardware id received on the port.

An easy api platform will also be provided where html and ruby code can be 
easily tested and implemented.

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