Part 1. Clock-in/out System: Diagram
This post is part of a Series of post which I'm describing a clock-in/out system if you want to read more you can read the following posts:
- Part 1. Clock-in/out System: Diagram.
- Part 2. Clock-in/out System: Basic backend - AuthModule.
- Part 3. Clock-in/out System: Basic backend - UsersModule.
- Part 4. Clock-in/out System: Basic backend- AppModule.
- Part 5. Clock-in/out System: Basic frontend.
- Part 6. Clock-in/out System: Arduino.
- Part 7. Deploy: Docker/Docker-Compose
In this first post of the series of post about the clock-in/out system I'm going to describe the system's architecture. The best way to describe the problem which our system will resolve is using a diagram. In this diagram you can see different components which can be in different or in the same server. The Figure 1 show the diagram used to build the clock-in/out system.
So, the components of our system are the following:
- ID Card: All users have a card which is identified using an UID. The way to work is that the user pass their card near of a Arduino system which has a NFC reader.
- Arduino: There are two Arduino in the system. The first is used to clock-in and the second is used to clock-out. So, each Arduino send to the backend the UID's card using the POST verb over HTTPS. The Arduino system have a NFC and a WiFi chip: 1) The first is used to read the card; 2) and the second is used to connect to the LAN to send the UID to the server.
- Backend: The backend is developed using NestJS which is a framework over express (although you can use other libraries as fastify) which can developed software using the SOLID principles and the syntax as Angular. This backend will be connected to a relational database Postgres using TypeORM as ORM.
There are several components which could be developed in the future as an admin panel to manage information about users and cards, personal information about my check-in/out in the system, the frontend could do search by users to know if the user is in the building or not. Maybe, in the future this features could be develop but today will go to presented a basic system of clock-in/clock-out.
The GitHub project is https://github.com/Caballerog/clock-in-out.