Experiment-10: Automatic Room Lights using Arduino and PIR Sensor IoT Experiments by Ravinder Nath Rajotiya - November 5, 20240 AIM: Automatic Room Lights using Arduino and PIR Sensor. Objective: We will be able to: Understand the working of PIR Sensor Understand the interfacing of PIR with arduino and Relay Develop real time program to Automatically control Room Lights Requirement : PC with internet, Arduino board, breadboard, PIR Sensor, Relay, LED, Jumper Wires Theory: PIR Sensor: A PIR sensor is an electronic sensor used in motion detectors such as automatically triggered lighting devices and protection systems that measure devices emitting infrared light in their field of view. Each body with a temperature above zero releases heat energy, which is in the form of radiation. PIR sensors detect infrared radiation that is reflected or released from the target instead of measuring or sensing heat. If the sensor detects an animal, insect, or a
Experiment-9: DHT11 Humidity Temperature Monitor on ThingSpeak with NodeMCU IoT Experiments by Ravinder Nath Rajotiya - November 4, 2024November 5, 20240 DHT11 Humidity Temperature Monitor on ThingSpeak with NodeMCU Objective: It explains how to log Humidity & Temperature data on the cloud. We can use Thingspeak as a cloud service provider and DHT11 to measure temperature and humidity. Requirement: NodeMCU ESP8266 Board, DHT11 humidity and temperature sensor, Connecting Wires, Breadboard Theory DHT11 Humidity & Temperature Sensor: The DHT11 is a basic, ultra low-cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air and spits out a digital signal on the data pin (no analog input pins needed). It’s fairly simple to use but requires careful timing to grab data. The only real downside of this sensor is you can only get new data from it once every 2 seconds,