FIRE FIGHTING ROBOT REMOTELY OPERATED BY ANDROID APPLICATIONS

FIRE FIGHTING ROBOT REMOTELY OPERATED BY ANDROID APPLICATIONS Submitted by:

contents • • • Project overview Block diagram Microcontroller 8051 Motor Driver IC Android App and Blue control Software Schematic & Working of the project Advantages Applications Future scope Conclusion

Project overview • The project is designed to develop a fire fighting robot using android application device for remote operation. • The robotic vehicle is loaded with water tanker and a pump which is controlled over wireless communication to throw water • At the transmitting end using android application device, commands are sent to the receiver to control the movement

Contd. . • When the robot faces a fire then it extinguishes fire with the help of pump motor connected to a water tank mounted on its body. • Remote operation is achieved by any smartphone/Tablet etc. , with Android OS, upon a GUI (Graphical User Interface) based touch screen operation. • The android application device transmitter acts as a remote control that has the advantage of adequate range

Block diagram Transmitter:

Microcontroller • It is a smaller computer • Has on-chip RAM, ROM, I/O ports. . . CPU I/O Port RAM ROM Serial Timer COM Port A single chip Microcontroller

Features of MC 8052 • 8 K Bytes of In-System Programmable (ISP) Flash Memory • 4. 0 V to 5. 5 V Operating Range • Fully Static Operation: 0 Hz to 33 MHz • 256 x 8 -bit Internal RAM • 32 Programmable I/O Lines • Three 16 -bit Timer/Counters • Eight Interrupt Sources • Full Duplex UART Serial Channel

Block diagram of MC External interrupts Interrup t Control On-chip ROM for program code Timer/Counter On-chip RAM Timer 1 Timer 0 CPU OSC Bus Control 4 I/O Ports P 0 P 1 P 2 P 3 Address/Data Serial Port Tx. D Rx. D Counter Inputs

Pin out of 8052

Power on Reset circuit +5 V + 10 u. F 31 30 p. F 8. 2 K 30 p. F 11. 0592 MHz 19 18 EA/VPP X 1 X 2 9 RST

RF remote control • The circuit uses HT 12 E, HT 12 D encoder and decoder. • 433 MHz ASK transmitter and receiver is used for the remote control.

Features of RF • Range in open space(Standard Conditions) : 100 Meters • RX Receiver Frequency : 433 MHz • RX Typical Sensitivity : 105 Dbm • RX Supply Current : 3. 5 m. A • RX IF Frequency : 1 MHz • Low Power Consumption • Easy For Application • RX Operating Voltage : 5 V • TX Frequency Range : 433. 92 MHz • TX Supply Voltage : 3 V ~ 6 V • TX Out Power : 4 ~ 12 Dbm

RF Encoder & Decoder • The HT 12 E Encoder ICs are series of CMOS LSIs for Remote Control system applications. They are capable of Encoding 12 bit of information which consists of N address bits and 12 -N data bits. • The HT 12 D ICs are series of CMOS LSIs for remote control system applications. • This ICs are paired with each other. For properation a pair of encoder/decoder with the same number of address and data format should be selected. • The Decoder receive the serial address and data from its corresponding decoder, transmitted by a carrier using an RF transmission medium and gives output to the output pins after processing the data.

MOTOR driver L 293 D • L 293 D is a dual H-bridge motor driver integrated circuit (IC). • Motor drivers act as current amplifiers since they take a lowcurrent control signal and provide a higher-current signal. • This higher current signal is used to drive the motors. Ø L 293 D contains two inbuilt H-bridge driver circuits. In its common mode of operation, two DC motors can be driven simultaneously, both in forward and reverse direction.

Operation of motor driver • L 293 D has 2 set of arrangements where one set has input 1, input 2, output 1 and output 2 and other set has input 3, input 4, output 3 and output 4, according to block diagram if pin no 2 & 7 are high then pin no 3 & 6 are also high. • If enable 1 and pin number 2 are high leaving pin number 7 as low then the motor rotates in forward direction. • If enable 2 and pin number 10 are high leaving pin number 15 as low then the motor rotates in forward direction.

Contd. . • If enable 1 and pin number 2 are low leaving pin number 7 as high then the motor rotates in reverse direction. • If enable 2 and pin number 15 are high leaving pin number 10 as low then the motor rotates in forward direction.

Working of project • The project uses HT 12 E Encoder which converts 4 bit data to serial output which is then fed to the RF module for transmitting the same to be received by the receiver RF module the output of which is fed to HT 12 D the serial decoder IC, the output of which is fed to controller. • The transmitting end MC is connected to a set of pushbutton. Thus while a particular button is pressed the program executed delivers corresponding 4 -bit data which are then transmitted serially at port 1. • The data so received at the receiver end of port 1 operates the motor through motor driver IC L 293 D as required being interfaced from the Microcontroller output port 2.

Contd. . • The transmitter is powered by a 6 v battery in series with a silicon diode to finally develop required voltage for microcontroller circuit. • The receiver is powered by a 12 v battery in series with a silicon diode to protect the circuits from accidental reverse battery connection. • 5 V DC out of the 12 V available from regulator IC 7805 is fed to the controller, decoder, the motor driver IC L 293 D pin 8 for operation of the motor.

Contd. . • The receiving unit uses one more motor driver IC L 293 D for driving one DC Motor for arm operation with a boom mounted on its shaft. • At the end of the shaft a nozzle is connected to a water tanks mounted water pump which is powered from “NO” contacts of a relay that is driven by transistor Q 1 from the output of MC pin 15, thus in the event of a fire the robotic vehicle is moved over to the location by operating the left, right, forward & backward button etc. • After it reaches the site the nozzle mounted motor takes position through the water on the fire from the water tank mounted DC pump actuated by the relay RL 1. • Thus the fire can be extinguished.

Software requirements • Keil an ARM Company makes C compilers, macro assemblers, real-time kernels, debuggers, simulators, integrated environments, evaluation boards, and emulators for ARM 7/ARM 9/Cortex-M 3, XC 16 x/ST 10, 251, and 8051 MCU families. • Compilers are programs used to convert a High Level Language to object code. Desktop compilers produce an output object code for the underlying microprocessor, but not for other microprocessors.

Contd. . • i. e. , the programs written in one of the HLL like ‘C’ will compile the code to run on the system for a particular processor like x 86 (underlying microprocessor in the computer). • For example compilers for Dos platform is different from the Compilers for Unix platform So if one wants to define a compiler then compiler is a program that translates source code into object code.

What is called Android. . ? • Android is an open-source operating system which means that any manufacturer can use it in their phones free of charge. • It was built to be truly open. For example, an application call upon any of the phone’s core functionality such as making calls, sending text messages, or using the camera.

……. contd Android is built on the open Linux Kernel. Furthermore, it utilizes a custom virtual machine that was designed to optimize memory and hardware resources in a mobile environment.

What is an android application on mobile phones? • An android app is meant for phones with an android based operating systems. They can be downloaded from the android app Market which is pre-loaded on every android phone. • Blue control APP and Bluetooth Spp APP are some examples.

Android-The world's most powerful mobile platform Very customizable. Open source operating system is easily changed, hacked, manipulated, and molded to fit whatever functionality you had in mind. Found on all platforms for all prices depending on what hardware and software version you are interested in. The battery is usually replaceable.

COMPARISION OF ANDROID WITH OTHER OS ANDROID OS : Android is open source software, manufacturers can modify the operating system to suit their respective needs and phones. This becomes a cheap and feasible alternative for the manufacturer, as opposed to developing an operating system in-house or hiring a software company to do it.

i-OS: It's not available on all carriers but this is expanding. The battery is not replaceable which is why all the I Phone users you know have it plugged in all the time as the battery degrades.

Windows Phone: Windows Phone is a closed-sourced, which means that it is solely developed by the company and protected by copyright. The Windows Store is limited as there only a few number of apps

ANDROID APPLICATION OPERATED BLUETOOTH • The Android platform includes support for the Bluetooth network stack, which allows a device to wirelessly exchange data with other Bluetooth devices. • The application framework provides access to the Bluetooth functionality through the Android Bluetooth APIs.

An example of Android App Blue-control Screen

FEATURES OF BLUETOOTH • Super simple and easy way to interface using Bluetooth stack. • 3. 3 V Device with standard 5 V DC Power source. • Can also support SPI Protocol, pins are made available. • Low power consumption, Low cost. • Has high-performance wireless transceiver system • Can be used to interface with PC, Mac or Android phones/tablets.

• Generic Default Visibility at Software side: HC-06 or Linvor • Default Pairing code is not '0000' but '1234'. • Please use Baud Rate with 8 -N-1 connectivity from other device. • Works with any microcontroller with Serial connectivity.

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