Smart Vesna Architecture

Smart Vesna Architecture
Integrated Measurement, Control, and Management System

1. SYSTEM OVERVIEW
Smart Vesna is a fully integrated automation architecture designed for the uninterrupted monitoring of environmental conditions and nutrient solution parameters in professional greenhouse facilities, the generation of automatic control decisions based on this data, and the physical implementation of these decisions through field equipment.

The system adopts a modular approach that layers measurement, control, and action mechanisms to operate independently yet in tight integration with one another. This layered structure guarantees the system's reliability, flexibility, scalability, and ease of maintenance.

The Smart Vesna architecture consists of four fundamental layers:

Each layer independently performs the task assigned to it. This separation prevents a failure that may occur at any point in the system from spreading to other layers and elevates the overall reliability of the entire system to the highest level.

2. MEASUREMENT LAYER
Purpose: To measure critical parameters of the greenhouse environment and nutrient solution with industrial precision and uninterrupted continuity.

Components:

• Smart Vesna Climate: An industrial-grade measurement computer that measures internal greenhouse temperature, relative humidity, and carbon dioxide (CO₂) levels. It filters raw data received from sensors, converts it into reliable measurement values, and transmits them instantaneously to the relevant layers.

• Smart Vesna Core: An industrial-grade measurement computer that measures the pH (acidity/alkalinity balance) and EC (electrical conductivity, hence nutrient density) values of the nutrient solution. It operates on the same architectural principles as Climate and presents measurement data to the system in real time.

Layer Features:

• Uninterrupted, 24/7 continuous measurement

• Industrial precision and accuracy

• Automatic measurement that completely eliminates human error

• Signal processing capability that filters out sudden deviations

• Open architecture allowing easy integration of new sensor types in the future (soil moisture, light intensity, pressure, dissolved oxygen, etc.)

Important Note: The measurement layer only produces data. It does not make any control decisions and does not directly intervene with field equipment. Its function is limited to providing reliable and consistent data to the decision layer.

3. MANAGEMENT LAYER
Purpose: To provide a central interface for the user to monitor, configure, report on, and manually intervene in the entire system when necessary.

Components:

• Smart Vesna Management System: A web-based, browser-accessible central management and monitoring platform. It presents all measurement data, alarm statuses, equipment operating statuses, and historical records to the user on a single screen.

Layer Features:

• Monitoring of all greenhouses and measurement points from a single screen

• Real-time dashboards

• User-defined alarm thresholds and a 3-level alarm system (Yellow - Warning, Red - Critical)

• Graphical and tabular reporting of historical data

• Definition of setpoints and control strategies

• Manual on/off control of equipment

• Temporary disabling of automation mode

• Authorization management for different user levels

• Remote access support (via internet connection)

Important Note: The management layer is the system's "observation and intervention" point. The system can continue to operate on its own without the management layer. The management layer provides the user with control and monitoring capabilities, but it is not mandatory for the system's core operation.

4. CONTROL LAYER
Purpose: To generate control decisions regarding the operating status of field equipment by comparing real-time data received from the measurement layer with user-defined setpoints and operating strategies.

Components:

• Smart Vesna Control Computer: The system's central decision-making mechanism. It collects all measurement data, analyzes it using advanced control algorithms (PID, stepped, on/off, timed, conflict prevention, etc.), and generates digital commands to be transmitted to the application layer.

Layer Features:

• Simultaneous evaluation of multiple parameters

• User-defined setpoints and strategies

• PID, stepped, on/off, and timed control modes

• Intelligent decision algorithms that prevent equipment conflicts

• Strategy management that varies according to time, crop cycle, and environmental conditions

• Emergency prioritization and safe state management

• Transition to a pre-defined safe state during communication interruptions

• Fully software-based configuration, requiring no physical intervention

Important Note: The decision layer only generates logical decisions. It does not apply these decisions directly to field equipment. The physical switching operation is the responsibility of the application layer. This separation is the fundamental principle of system safety.

5. APPLICATION LAYER
Purpose: To convert digital commands received from the control layer into the physical switching of field equipment (fans, heaters, coolers, pumps, motors, lighting, valves, etc.).

Components:

• Smart Vesna Relay Modules: Industrial switching units offering up to 64 independent relay outputs. They communicate with the Control Computer via industrial communication protocols (RS-485, Ethernet) and activate or deactivate the relevant relay channels according to incoming commands.

Layer Features:

• Up to 64 independent switching channels

• Industrial-grade power relays (high current carrying capacity)

• Complete electrical isolation between the control circuit and field circuit via optical isolation

• Independent LED status indicators for each channel

• Short-circuit and overcurrent protection

• Modular structure: Multiple modules can operate on the same network as needed

• Ability to set all outputs to a safe state when connection to the Control Computer is lost

Important Note: Relay modules do not activate any equipment unless they receive commands from the decision layer. They have no independent decision-making capability. This prevents equipment from operating without authorization or in unexpected ways.

6. DATA FLOW AND OPERATING CYCLE BETWEEN LAYERS
In the Smart Vesna architecture, data flow occurs continuously and cyclically as described below:

1. Data Generation: The measurement layer (Climate/Core) converts measurements taken from the physical environment into digital data.

2. Data Transmission: Measurement data is transmitted in real-time via the local network to the Decision layer (Control Computer). The same data is also sent to the Management layer for monitoring and recording purposes.

3. Decision Generation: The Control Computer compares current measurement data with user-defined strategies and setpoints. It analyzes deviations and decides which equipment should be in which state.

4. Command Transmission: The decisions taken are transmitted as control commands to the Application layer (Relay Modules).

5. Physical Action: The Relay Modules evaluate incoming commands and switch the relevant relay channels to start or stop field equipment.

6. Feedback Loop: The changing physical conditions are re-sensed by the measurement layer, and the cycle repeats from step 1.

This cycle repeats several times per second, ensuring that the greenhouse continuously remains at the target conditions defined by the user.

7. ADVANTAGES OF THE SYSTEM'S MODULARITY
The layered and modular structure of the Smart Vesna architecture provides the following critical advantages:

8. SAFETY AND DATA INTEGRITY
In the Smart Vesna architecture, safety is ensured at both hardware and software levels through the following principles:

• Electrical Isolation Between Layers: The measurement and decision layers are separated from the application layer by optical isolation. High voltage, overcurrent, or electromagnetic interference originating from field equipment cannot reach the sensitive control hardware.

• Data Integrity Checks: Special checksum and validation mechanisms are used against errors that may occur during data transmission. Corrupted data is automatically rejected by the system.

• Communication Loss Safety: When communication between the decision layer and the application layer is lost, the relay modules transition to a pre-defined safe state (all outputs passive). This prevents equipment from continuing to operate undesirably in the event of control loss.

• Automatic Data Recovery: During network interruptions, the measurement layer continues to collect data. When the connection is re-established, all data generated during the interruption is automatically transmitted to the central system. No data loss occurs.

• Conflict Prevention: The Control Computer includes logical controls that prevent the same equipment from being operated for opposing functions (e.g., heating and cooling simultaneously).

• Physical Durability: All hardware components are designed to withstand the temperature, humidity, power outages, and electromagnetic interference conditions of the industrial greenhouse environment.

9. SCALABILITY AND MULTI-FACILITY MANAGEMENT
The Smart Vesna architecture is designed to scale from a single greenhouse to geographically dispersed dozens of facilities.

• Adding a New Greenhouse: When a new facility is established, a new Measurement Layer (Climate/Core) and Application Layer (Relay Modules) are installed at that facility. The existing Decision Layer (Control Computer) and Management Layer automatically recognize the new components and incorporate them into the system.

• Centralized Monitoring: Through the Management System, the real-time status, alarm information, equipment operating statuses, and historical data of all greenhouses can be displayed on a single screen.

• Comparative Analysis: Data from different greenhouses can be compared, the most efficient practices can be identified, and operational improvements can be made.

• Independent Strategy Management: Each greenhouse can be independently configured and managed according to its own specific crop, climate, and nutrient requirements.

10. SYSTEM COMPONENT RELATIONSHIP AND DEPENDENCY MATRIX

11. TECHNICAL COMMUNICATION STANDARDS
The Smart Vesna architecture uses standard industrial automation communication protocols:

• RS-485 (Modbus RTU): Provides reliable and noise-resistant serial communication between the measurement and application layers. Suitable for long-distance installations.

• Ethernet (Modbus TCP): Used for communication between the management layer and the decision layer. Offers high speed and remote access capability.

• Local Area Network (LAN): All components communicate over the greenhouse's local network. Internet connection is only required for remote access and is not mandatory for the system's core operation.

12. SUMMARY: CORE PRINCIPLES OF THE ARCHITECTURE

• Separation of Concerns: Measurement, decision-making, and application tasks are separated into independent layers.

• Modularity: Each layer consists of replaceable and expandable components that independently perform their own tasks.

• Reliability: Independence between layers prevents a single failure from affecting the entire system.

• Flexibility: The system can be installed, expanded, and customized gradually according to user needs.

• Safety: The separation of decision and application layers prevents incorrect or unauthorized commands from reaching equipment.

• Data Integrity: Checksum, validation, and automatic recovery mechanisms are active throughout all data transmission.

• Scalability: Usable at any scale, from a single greenhouse to multi-facility management.

The Smart Vesna architecture is an industrial-grade, layered, modular, and future-oriented automation platform designed to ensure that your greenhouse is managed continuously, reliably, and efficiently.