The document discusses the Internet of Things (IoT). It defines IoT as the network of devices that contain electronics, software and connectivity which allows them to connect and exchange data. The key components of IoT include devices/sensors that collect data, gateways that transmit data between networks, the cloud for data storage and processing, analytics to analyze data, and user interfaces for human access. Common IoT applications are then discussed, including using the NodeMCU and ESP8266 microcontroller board to build basic IoT projects like controlling an LED, reading temperature and humidity with a DHT11 sensor, and using a relay module.

1. Internet Of things

2.  The Internet Of Things is the network of
devices , vehicles and home appliances that
contain electronics , software , actuators, and
connectivity which allows these things to
connect , interact and exchange data.
 In simple words iot is an ecosystem of
connected physical objects which are
accessible through internet.
What is IoT?

3. Various Names , One Concept
 M2M (Machine to Machine)
 “Internet of Everything”
 “World Size Web”
 “Skynet” (Terminator movie)

4. Components Of IOT

5. Devices And Sensors
 Devices and sensors are the components of
the device connectivity layer.
 These smart sensors are continuously
collecting data from the environment and
transmit the information to the next layer.
 Examples-temperature sensor , moisture
sensor.

6. Gateway
 Gateway manages the bidirectional data traffic
between different networks and protocols.
 Gateways can be configured to perform pre-
processing of the collected data from
thousands of sensors locally before
transmitting it to the next stage.
 It acts as a middle layer between devices and
cloud to protect the system from malicious
attacks and unauthorized access.

7. Cloud
 Internet of things creates massive data from
devices, applications and users which has to
be managed in an efficient way.
 IoT cloud offers tools to collect, process,
manage and store huge amount of data in real
time.
 Industries and services can easily access
these data remotely and make critical
decisions when necessary.

8. Analytics
 Analytics is the process of converting analog
data from billions of smart devices and
sensors into useful insights which can be
interpreted and used for detailed analysis.
 Careful analysis will help organizations to
predict trends in the market and plan ahead for
a successful implementation.

9. User Interface
 User interfaces are the visible, tangible part of
the IoT system which can be accessible by
users.
 Designers will have to make sure a well
designed user interface for minimum effort for
users and encourage more interactions.
 Modern technology offers much interactive
design to ease complex tasks into simple
touch panels controls.

10. Why IOT?
 Dynamic control of industry and daily life
 Improves the resource utilization ratio.
 Integrating Human society and physical
system.
 Flexible configuration.
 Acts as technology integrator.
 Universal inter networking.

11. Applications Of IOT

12. NodeMCU

13.  NodeMCU is an open source IoT platform.
Which includes firmware which runs on the
ESP8266 Wi-Fi Module.
 It has GPIO(general purpose input output)pins
for the interfacing of sensors , actuators and
other modules like LCD module.

14. ESP8266 Features
 Open Source
 Interactive
 Programmable
 Low Cost
 Simple
 Wi-fi enabled
 Plug and Play

15. Specifications
 Developer - Esp8266 Open Source
Community
 CPU - Esp8266
 Memory - 128 kb
 Storage - 4 mb
 Power Voltage- 3v , 5v(with 3.3v inbuilt voltage
regulator)
 Code -Arduino CPP

16. Ready For First Program?
Glow A LED
#define LE D0
Void setup()
{
pinMode(LE,OUTPUT);
}
Void loop()
{
digitalWrite(LE,HIGH);
}

17. DHT11(temp & humidity)
 Humidity Range : 20%-90% RH
 Humidity Accuracy : (+/- 5%)
 Temp Range : 20-50(Degree Celsius)
 Temp Accuracy : (+/- 2%)

18. Relay Module
 Switching Device
 Operating Voltage :5 v
 It has NC(Normally Closed) and NO(Normally
Open) ports