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IoT Experiments

This category exemplifies the different use case based on Arduino, ESP and other boards. I will take you from the very basics of IoT sensors and actuators and build some interesting applications

Experiment-10:  Automatic Room Lights using Arduino and PIR Sensor

by Ravinder Nath Rajotiya - 0

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

by Ravinder Nath Rajotiya - 0

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,

Experiment-8 : To configure nodeMCU ESP8266 12-E in station mode

by Ravinder Nath Rajotiya - 0

AIM : To configure nodeMCU ESP8266 12-E in station mode, and indicate the connected status on the LED. Objective: To configure ESP8266 as a station To establish communication between Access point and the station nodeMCU ESP8266 station. To blink the LED while searching for SSID and continuously glow when connected Requirement: Breadboard NodeMCU ESP8266 12-E One LED to indicate connected status One 220 Ohm Resistor Theory: Mode of Operation of ESP8266 - nodeMCU ESP8266 can operate in the following modes: Station (STA) Only Soft Access Point (Soft AP) Both the Soft Access Point and Station (Soft AP +STA) To play around with the ESP8266 WiFi module, you can program it in two modes: Station (STA) or Access Point (AP). Station (STA) Mode In station mode, ESP8266 will act just like

Experiment-7: To demonstrate web server and client communication using nodeMCU ESP8266 12-E as a Soft AP

by Ravinder Nath Rajotiya - 0

AIM : To demonstrate nodeMCU ESP8266 as Soft AP web server Objective: At the end of this experiment students will be able to: Understand mode of connection of ESP8266 Understand the use of Soft AP Create web server and access it on client (Mobile) via the URL Control LED using mobile phone Requirement: Breadboard, connecting jumper wires NodeMCU ESP8266 12-E Two 5mm blue Light Emitting Diodes (LEDs) Two 220 Ohm Resistor Theory: You all know that a web server hosts files, images, text, videos, blog posts, or other relevant data of a specific website i.e., Wikipedia, Google, Yahoo, etc. Any clients can connect to such a web server anytime and fetch relevant information. Communication between a client and a web server takes place using HTTP Request or HTTP

Experiment-6: To Measure humidity and temperature using Arduino

by Ravinder Nath Rajotiya - 0

Aim : Measure humidity and temperature Objective: At the end of this experiment we will be able to: Understand the working of DHT module Interface DHT11 with arduino and develop a program using DHT-11 Requirement: PC with Arduino IDR, Arduino Uno board, DHT-11 module and 03 jumper wire. Theory DHT11 Sensor The DHT-11 is a digital-output relative humidity and temperature sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air. It is smaller and less expensive but this sensor is less precise, less accurate and works in a smaller range of temperature and humidity when compared with DHT22. DHT11 has a sampling rate of 1Hz, which means it can provide new data once every second. Comes with 4 pin or

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