feat(readme): Add aditional content to the main readme

README.md

@@ -10,3 +10,121 @@ Assignments made for the first semester of ROS2
 <br><br>
 
 ## Table of contents
+
+- [System Architecture](#system-architecture)
+- [Components](#components)
+- [Installation](#installation)
+
+---
+
+## System Architecture
+
+The TI Minor Grade Generator is a ROS2-based distributed system for managing student exam results and calculating final grades. The system follows a microservices architecture with clear separation of concerns.
+
+### Overview
+
+The system consists of multiple ROS2 nodes that communicate through topics and services to process exam data, calculate grades, and store the results in a database.
+
+### Components
+
+#### Core Nodes
+
+1. **ExamResultGenerator** (`assignments::one::exam_resutl_generator`)
+    - Publishes random exam results for students and courses
+    - Simulates exam result generation for testing and demonstration
+    - ([Full documentation](doc/nodes/ExamResultGenerator.md))
+
+
+2. **FinalGradeDeterminator** (`assignments::one::final_grade_determinator`)
+    - Collect grades from ExamResultGenerator
+    - Send results to the GradeCalculator
+    - Put resulting grade in the Database
+    - ([Full documentation](doc/nodes/FinalGradeDeterminator.md))
+
+3. **GradeCalculator** (`assignments::one::grade_calculator`)
+   - Provides ROS2 service for calculating student exam grades
+   - Ensures grade results are within valid bounds (10-100)
+   - ([Full documentation](doc/nodes/GradeCalculator.md))
+
+
+#### Database Management
+
+- **DatabaseManager**: Handles all database operations including storing final course results
+- ([Full documentation](doc/DatabaseManager.md))
+
+#### Configuration Management
+
+- **ConfigManager**: Loads and validates system configuration from TOML files
+- Provides runtime access to configuration parameters for all nodes
+- Ensures consistent environment setup and error handling for misconfigurations
+- ([Full documentation](doc/ConfigManager.md))
+
+#### Message Interfaces
+
+- **Exam Messages** (`g2_2025_interfaces::msg::Exam`): Contains student name, course name, result, and timestamp
+- **Student Messages** (`g2_2025_interfaces::msg::Student`): Contains student and course information with timestamp
+- **Grade Calculation Service** (`g2_2025_interfaces::srv::Exams`): Service interface for grade calculation requests
+
+### Workflow
+
+1. **Exam Result Collection**: Exam results are published to the `exam_results` topic
+2. **Result Aggregation**: FinalGradeDeterminator collects results until the configured threshold is met
+3. **Grade Calculation**: When enough results are available, a service call is made to GradeCalculator
+4. **Result Processing**: Calculated grades are published and stored in the database
+5. **Student Management**: Final student information is published to `student_course_management` topic as this stops the random generation of grades
+6. **Retake scheduler**: Schedule an exam retake for the grades below 55 by resending information to `student_course_management` as this will re-enable grade generation
+7. **Retake grade determination**: repeat steps 1 through 6 using the `retake_grade_determinator` node instead of `final_grade_determinator` until every student hase a passing grade
+
+### Configuration
+
+The system uses TOML configuration files for environment-specific settings:
+- Database connection parameters
+- ROS2 node configurations
+- Grade collection thresholds
+
+### Testing
+
+Unit tests are implemented using Google Test framework:
+- Mock services and database managers for isolated testing
+- Parameterized tests for various grade calculation scenarios
+- Documentation on the tests are located in the full documentation of the nodes themselves
+
+## Installation
+
+### Prerequisites
+
+- ROS2 Jazzy or newer installed ([ROS2 Installation Guide](https://docs.ros.org/en/jazzy/Installation.html))
+- CMake (version 3.8+)
+- Python 3.8+
+- libtomlplusplus-dev
+- libpqxx-dev
+- Colcon build tool
+- Docker compose
+
+### Clone the Repository
+
+```bash
+git clone https://git.wessel.gg/inholland/ros2-assignments.git
+cd ros2-assignments
+```
+
+### Build the Workspace
+
+```bash
+colcon build
+```
+Any parameters can be changed before building by editing the `grade_calculator.launch.xml` in the launch folder
+
+### Source the Workspace
+
+```bash
+source install/setup.bash
+```
+
+### Run the System
+
+```bash
+sudo docker-compose up
+ros2 launch g2_2025_grade_calculator_pkg grade_calculator.launch.xml
+```
+