Arduino interfacing with bluetooth.
- 1. Overview 1. What is IOT? 2. How to get Started. 3. What is Arduino? 4. What is its used for?
- 2. IOT Internet Of Things is interconnection of various Digital Devices which enables them to share data , with least required human-human or human- computer interaction. The vast network of devices connected to the Internet, including smart phones and tablets and almost anything with a sensor on it – cars, machines in production plants, jet engines, oil drills, wearable devices, and more. These “things” collect and exchange data.
- 4. What is Arduino? • Arduino is a open source hardware and software platform. In 2005 Massimo Banzi of Italy created it. • These are AVR based microcontrollers. • Various Arduino boards are UNO, Nano, Lilypad, MEGA, MEGA ADK etc.
- 5. Why Arduino? • IT is open Source, both in terms of hardware and software. • It is cheap, and can be made by using purchased components. • It can communicate via serial communication by USB • Powered even from PC.
- 6. Arduino IDE • Figure showing a basic program of Arduino IDE
- 7. Atmega 328 •Microcontroller ATmega328 •Operating Voltage (logic level): 5 V •Input Voltage (recommended): 7-12 V •Input Voltage (limits): 6-20 V •Digital I/O Pins : 14 (of which 6 provide PWM output) •Analog Input Pins: 8 •DC Current per I/O Pin: 40 mA •Flash Memory 32 KB (ATmega328) of which 2 KB used by bootloader •SRAM: 2 KB (ATmega328) •EEPROM: 1 KB (ATmega328) •Clock Speed: 16 MHz
- 8. About Project • Project is own an application of IOT. • Title:- Bluetooth controlled devices using Arduino. • Components Used:- 1. Arduino Nano, Bluetooth HC-05 2. Relays, ULN 2003 3. 220V light bulbs as AC load.
- 10. What is relay? • Relay is kind of an electric lever , it switches ON with a tiny current but switches ON(leaverages) other devices with a large current.
- 11. Why to use relay? • For relay only machine interaction is is required in circuit. • Circuit powering the coil is completely separate from the circuit switched ON by the relay. • For low power controlling circuit to control high power controlled circuit relays are used. • In this circuit 220V AC load is there so 12V relays are used.
- 12. What is ULN 2003? What is this used for? • ULN is an array of 7 NPN darlington transistor ,capable of 50 mA’s of current and upto 50 V of output. • ULN acts as an invertor. • It also acts as an voltage driver between relay And Arduino
- 13. Bluetooth module HC-05 • Default baud rate is 9600. But it supports upto 1382400 upto requirement of high speed transmission • Works at Frequency of 2.5 GHz • Auto pairing code is 0000 by default but you can change it as your wish.
- 14. Android App used • App is built on Appinventor by MIT. Bulding Block Are shown in figure
- 15. App
- 16. Program working • Program is written in file works as: 1. Setting the output pins D2,D3 as 2, 3 respectively 2. Setting baud rate of Serial Communication 9600. 3. Checking if Serial Data is Available. 4. Table of App Working. Light no. ON OFF Light 1 Sends character ‘a’ Sends character ‘b’ Light 2 Sends character ‘c’ Sends character ‘d’
- 17. Applications of Project • DIY Projects. Like RFID based. • Can be used for physically disabled persons. • Applications where short circuit may happen if touched the supply. • Wireless Serial Communication. • Home Automation. • Can be used for various sound enabled devices.
- 18. Disadvantages • Only work for limited range or short distance path • Number of appliances which can be controlled through it are limited. • Circuit complexity increases as the number if connected devices are increased. • Don’t play stupid with your house electricity.
- 19. Future Scope of IOT • Smart homes. • Smart farms. • Smart cities. Jalandhar one of the Upcoming smart cities. • Smart industry. • Our smartphones are brilliant examples of IOT.
- 20. Thank You for your attention • ANY QUERIES.Post in comments