This is a presentaion that i made for my college which describes the Nodemcu board and connecting it to the internet

1. Workshop
on
Real-Time IOT Using NodeMCU

2. IOT
• Network of physical objects-“things”-that are embedded with sensors, software, and other
technologies for the purpose of connecting and exchanging data with other devices and
systems over the internet.
• An IOT ecosystem consists of web-enabled smart devices that use embedded systems, such
as processors, sensors and communication hardware, to collect, send and act on data
they acquire from their environments.

3. USES OF IOT
• Manufacturing Industry
• Agriculture Industry
• Healthcare
• Home Automation
• Automobile and Transportation
• Energy Sector

4. WHY IOT?
Connectivity
 Enables devices to connect to the internet.
 Share data and communicate with other devices.
 Devices can work together.

5. WHY IOT?
Efficiency
 Automating tasks.
 Monitoring systems in real-time
 Providing data for predictive maintenance.

6. WHY IOT?
Personalization
 create of personalized experiences for individuals .
 improve services and products.

7. WHY IOT?
 Innovation
 creating new products and services that were not possible before.
 lead to new business opportunities.

8. WHY IOT?
 Data
 Data can be analysed in the future
 gain insights into consumer behavior
 optimize operations

9. LAYERS OF IOT
ARCHITECTURE
• Device Layer
• Communication's Layer
• Data Storage and Processing
• Application Layer

10. DEVICE LAYER
• First layer of IoT architecture is a sensing layer
• Includes devices , sensors, and actuators
• Collect data from their surroundings

11. COMMUNICATION LAYER
• Transports data from the Device Layer to the Internet
• Security functionality including authentication, encryption and malware
protection

12. DATA STORAGE AND PROCESSING
• structured to handle data analysis and pre-processing.
• Located in the cloud.
• Data can be accessed by applications for edge analytics in use cases
like autonomous vehicles where real-time data is necessary.
• Data is monitored and managed while the processing is completed.

13. APPLICATION LAYER
• located in the cloud
• data is used by end-user applications.

14. LAYERS OF IOT ARCHITECTURE
• Device Layer: A temperature sensor takes temperature readings inside a
refrigerator.
• Communications Layer: Readings are sent to a router via a proprietary
protocol and sent to the cloud.
• Data Storage and Processing Layer: The cloud stores and processes the
incoming data to generate alerts in real time and, when possible, reduce the
total amount of data stored.
• Application layer: The cloud generates reports and analysis for end users
to applications and record keeping, via both web interfaces and email
delivery.

15. PROTOCOL’S IN IOT
• MQTT ( Message Queuing Telemetry Transport )
• CoAP ( Constrained Application Protocol )
• HTTP ( Hypertext Transfer Protocol )
• DDS ( Data Distribution Service )
• Bluetooth
• LoRaWAN

16. MQTT
• set of rules
• lightweight messaging between devices and the cloud
• Used where reliability and low bandwidth are critical
• supports messaging between devices to the cloud and the cloud to the
device

17. MQTT
• Lightweight and efficient
• requires minimal resources
• control message can be as little as two data bytes.
• Scalable
• requires a minimal amount of code that consumes very little power in operations
• support communication with a large number of IoT devices.
• Reliable
• reduce the time the IoT device takes to reconnect with the cloud
• Secure
• encrypt messages and authenticate devices
• Well-supported
• languages have extensive support for MQTT protocol
• implement with minimal coding in any type of application.

18. HTTP
• sending and receiving data between web servers and IoT devices.
• used for IoT devices when there is a lot of data to be published
• connect 3D printers in the network.

19. NODEMCU
• Also known as ESP8266 NodeMCU
• NodeMCU is an open-source platform, its hardware design is open for
edit/modify/build
• Has 8 Digital and 1 Analog Pins
• It supports serial communication protocols i.e. UART, SPI, I2C, etc

20. NODEMCU

21. BENEFITS

22. PROTOCOLS
•UART (universal asynchronous receiver-transmitter)
•SPI (Serial Peripheral Interface)
•I2C ( Inter-Integrated Circuit)

23. SPI
• communication typically happens over short
distances used on a circuit board
• low amount of data transmission
• Have 4 wires to operate
• SCLK
• MOSI
• MISO
• SS

24. I2C
• Only uses two wires
• Supports multiple
masters and multiple
slaves
• Hardware is less
complicated than with
UARTs
• Well known and widely
used protocol

25. UART
• Intergrated circuit in a computer or an microcontroller
• Data is transferred bit by bit using a single line or wire
• Change parallel data into serial data for outbound communications
• Change serial data into parallel data for inbound communications

26. • Low current consumption
• More no of digital I/O Pins
• Better processor and memory
• Breadboard friendly
• Built in WiFi
BENEFITS

27. • Int
• Char
• Float
• Double
• boolean
VARIABLES

28. • pinMode
• digitalWrite
• digitalRead
• analogWrite
• analogRead
• Serial
• delay
DATATYPES

29. • If
• If else
• for
• while
Control structures

30. • Void setup()
• Void loop()
DEFAULT FUNCTIONS

31. FIRST
PROGRAM
void setup()
{
pinMode(LED_BUILTIN, OUTPUT);
}
void loop() {
digitalWrite(LED_BUILTIN, HIGH);
delay(1000);
digitalWrite(LED_BUILTIN, LOW);
delay(1000);
}

32. SOFTWARE
• CP2102 Driver
• http://bit.ly/3TPbsPq
• Arduino IDE
• https://bit.ly/3U61TvX

33. CONFIGURATION
• Install CP2102 Driver
• Install ESP8266 to Arduino IDE
• http://arduino.esp8266.com/stable/package_esp8266com_index.json
• Tools>>Board>>Boards Manager>>ESP8266>>Install
• Tools>>Board>>esp8266>>Nodemcu 1.0 (ESP-12E Module)
• Select correct Port

34. CONNECTING
TOWIFI
#include <ESP8266WiFi.h>
const char *ssid = "Your wifi Network name";
const char *pass = "Network password";
WiFiClient client;
void setup()
{
Serial.begin(9600);
delay(10);
Serial.println("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, pass);
while (WiFi.status() !=WL_CONNECTED)
{
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
}
void loop()
{
}

35. HANDS ON PROJECTS
• Led Blink
• WiFi Connection
• WiFi with LED
• Interfacing with DHT22
• NodeMCU as a WebServer
• Sending data from sensor to Thingspeak,Firebase,Adafruit IO over IOT

36. CHALLENGES IN LARGE SCALE IOT
• Scalability
• Data management
• Security
• Interoperability
• Cost

37. TOPICS DISCUSSED
• What is meant by IOT
• Uses of IOT
• Introduction to NodeMCU
• Hands on Projects
• Case Studies
• Challenges in large scale IOT

38. THANKYOU