The latest articles on DEV Community by manikanda balamurugan S (@bala02102008). https://dev.to/bala02102008 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4171244%2Fe1ba99a0-06ac-4a59-a2cf-4e2be7386701.png https://dev.to/bala02102008 en manikanda balamurugan S Fri, 09 Oct 2026 13:41:04 +0000 https://dev.to/bala02102008/ldr-based-light-intensity-monitoring-using-iot-and-kiwis-iot-5a6j https://dev.to/bala02102008/ldr-based-light-intensity-monitoring-using-iot-and-kiwis-iot-5a6j <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Farticles%2Fa9f64gjlm9m4luyudp9q.jpeg" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Farticles%2Fa9f64gjlm9m4luyudp9q.jpeg" alt=" " width="800" height="430"></a><br> <a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Farticles%2F9924w0w46y4czgjhlafl.png" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Farticles%2F9924w0w46y4czgjhlafl.png" alt=" " width="799" height="316"></a><br> <a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Farticles%2Fa99s20e8paet7txfrf9v.jpeg" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Farticles%2Fa99s20e8paet7txfrf9v.jpeg" alt=" " width="800" height="309"></a></p> <h2> Introduction </h2> <p>The Internet of Things (IoT) allows physical devices to collect and exchange data through the internet. In this project, an LDR (Light Dependent Resistor) sensor is used to monitor changes in surrounding light intensity.</p> <p>The sensor reading is collected by a microcontroller and monitored through the KiWiS IoT platform.</p> <h2> Objective </h2> <p>The main objective is to monitor light intensity in real time and display the sensor readings on an IoT dashboard.</p> <h2> Components Required </h2> <ul> <li>LDR sensor</li> <li>Microcontroller with Wi-Fi capability</li> <li>Resistor</li> <li>Breadboard</li> <li>Jumper wires</li> <li>Power supply</li> <li>Wi-Fi connection</li> </ul> <h2> Software and Platform </h2> <ul> <li>Arduino IDE</li> <li>KiWiS IoT platform</li> </ul> <h2> Working Principle </h2> <ol> <li>The LDR sensor detects the light falling on its surface.</li> <li>The sensor's electrical response changes according to the surrounding light.</li> <li>The microcontroller reads the sensor signal.</li> <li>The microcontroller sends the reading to the KiWiS IoT platform through Wi-Fi.</li> <li>The dashboard displays the received sensor data.</li> <li>The displayed reading changes when the surrounding light conditions change.</li> </ol> <h2> System Flow </h2> <p>Light Source → LDR Sensor → Microcontroller → Wi-Fi → KiWiS IoT Dashboard</p> <h2> Applications </h2> <ul> <li>Smart lighting systems</li> <li>Indoor light monitoring</li> <li>Smart classrooms</li> <li>Energy-saving automation</li> <li>IoT-based environmental monitoring</li> </ul> <h2> Future Enhancements </h2> <ul> <li>Automatic light ON/OFF control</li> <li>Mobile notifications</li> <li>Sensor data logging</li> <li>Historical data analysis</li> <li>Automatic brightness control</li> </ul> <h2> Conclusion </h2> <p>This project demonstrates how an LDR sensor and a Wi-Fi-enabled microcontroller can be used for IoT-based light monitoring. By connecting the system to KiWiS IoT, sensor readings can be viewed through an online dashboard.</p> <p>The project provides a foundation for developing more advanced smart lighting and environmental monitoring applications.</p> <h2> Project Category </h2> <p>IoT | Embedded Systems | Sensor Monitoring</p> <h2> Feedback </h2> <p>Have you worked on a similar IoT project? Share your ideas and suggestions in the comments!</p> iot arduino beginners electronics