Wireless Sensors Network Kit

📌 Why WSN is Important
Wireless Sensor Networks (WSNs) are the nervous system of smart environments — they connect the physical world to the digital world by sensing, communicating, and reporting real-time data without human intervention.

🎓 Why Cognifront's WSN Kit Matters
Cognifront's WSN kit is the perfect starting point to explore the future of connected systems. It helps students and teachers to learn how real-world sensing, communication, and data processing work — all in one hands-on, scalable setup.

Overview

The WSN Kit is a modular wireless sensor network system designed for educational and experimental use. It includes:

• 5 Sensor Nodes (based on NodeMCU ESP8266)
• 2 Repeater Nodes (based on NodeMCU ESP8266)
• 1 Centeral Server Node (based on Raspberry Pi)
• GUI Based Management Software for configuration, real-time network and data visualization, other utilities.

Explore the key components of the Wireless Sensors Network (WSN) Kit through these images. This gallery gives you a closer look at what’s inside the kit and how each sensor node is designed for hands-on learning.

🔍 Take a Look:

Sensor Type	Sensor Type
Raspberry Pi Server	Gas Sensor Node
Temperature Sensor Node	Humidity Sensor Node File:Humidity.jpg
LDR Sensor Node File:Ldr.jpg	Push Button Node
Repeater Node

These images are part of the WSN Kit developed by Cognifront – a powerful tool for interactive, real-time IoT education.

System Architecture

The system follows a hierarchical network model:

• Sensor Nodes transmit data to Repeater Nodes / Central Server
• Repeater Nodes forward the data to the Central Server
• The Server Node stores, processes, and visualizes the data with the Desktop GUI

Important Notes:

• Sensor → Repeater (one-way)
• Repeater → Server (one-way)
• No Direct Sensor ↔ Server communication
• Each Sensor connects to only one Repeater
• Each Repeater connects to only one Repeater or Server
• If the distance between a Sensor Node and the Server Node exceeds the WiFi range of the NodeMCU module, one or more Repeaters must be placed between them to extend the communication range and ensure reliable data transmission.

Components

Component	Quantity	Platform	Description
Sensor Node	5	NodeMCU ESP8266	Equipped with environmental sensors
Repeater Node	2	NodeMCU ESP8266	Relays data to the Server
Server Node	1	Raspberry Pi	Collects and stores data
Desktop GUI	1	Cross-platform	Visualizes nodes, connections, and data status

Sensor Types Used

Each sensor node in the WSN Kit is equipped with one or more of the following sensors:

• Humidity Sensor (HR202) – Detects ambient humidity levels.
• Waterproof Temperature Sensor (DS18B20) – Measures temperature in harsh or wet environments.
• Smoke Sensor (M12) – Detects smoke presence in the air.
• LDR (Light Dependent Resistor) – Measures light intensity.
• Push Button – Used as a manual trigger to activate a buzzer.

These sensors help demonstrate different real-world use cases such as environmental monitoring, fire detection, and user interaction.

Connection Flow Diagram

Sensor Node (S1) ---> Repeater Node (R1)
Sensor Node (S2) ---> Repeater Node (R1)
Sensor Node (S3) ---> Repeater Node (R2)
Sensor Node (S4) ---> Repeater Node (R2)
Sensor Node (S5) ---> Repeater Node (R2)

Repeater Node (R1) --- Repeater Node (R2)
Repeater Node (R2) ---> Server (Raspberry Pi)

Desktop GUI Features

The WSN Kit includes a cross-platform Desktop GUI that allows real-time visualization and monitoring of the network.

Key Features

• Live network topology map
• Real-time data stream from sensors
• Node-to-repeater and repeater-to-server connection indicators
• Node status (active/inactive)
• Configurable update interval
• WSN Conceptual mode

Applications of the WSN Kit

The Wireless Sensor Network (WSN) Kit can be used in a variety of real-world scenarios, including but not limited to:

• Environmental Monitoring: Measuring temperature, humidity, smoke, and light levels in indoor or outdoor environments.
• Fire Detection: Using smoke sensors and temperature sensors to detect early signs of fire.
• Home Automation: Triggering alerts or devices (e.g., buzzers) based on sensor inputs like push buttons or environmental conditions.
• Educational Purposes: Teaching concepts of wireless communication, sensor integration, and network topology visualization.
• Industrial Monitoring: Collecting data from multiple sensors to monitor equipment health and safety conditions.
• Security Systems: Detecting unauthorized access or environmental anomalies with sensors and immediate alerts.

These applications demonstrate the versatility of the WSN Kit for prototyping, research, and practical deployments.

Notes

• Make sure each sensor is uniquely addressed.
• Only one repeater should handle a sensor's data.