The project aims at developing an android controlled robot which is capable of detecting bomb, fire, motion and GAS automatically and gives the alert intimation to the user mobile via Bluetooth. The project makes a use of Arduino UNO microcontroller, the main controlling device of the input and output modules. HC-05 Bluetooth module for wireless intimation and controlling of robot. Metal detector is used to detect the bombs in the path of robot. PIR sensor is used to detect the motion. MQ-2 sensor is used to detect the GAS. Flame sensor is uses to detects the flame. Bluetooth is a wireless technology standard for exchanging data over short distances (using short-wavelength UHF radio waves in the ISM band from 2.4 to 2.485 GHz) from fixed and mobile devices, and building personal area networks (PANs). Invented by telecom vendor Ericsson in 1994. The controlling device of the whole system is done using Arduino UNO Microcontroller. The robot can be controlled through our mobile phone over Bluetooth communication. The Bluetooth receiver module in our system gets the input from our mobile phone and gives the same input to the microcontroller. The microcontroller will control the robot accordingly. While moving the robot, metal or gas or motion or fire is detected, the robot will give an alert to the user's mobile via Bluetooth. The Arduino UNO Microcontroller loaded program written in Embedded C language.  

Objectives: Develop an Android-Controlled Robot: Create a robotic system that can be controlled remotely via an Android device using Bluetooth communication. Implement Detection Sensors: Integrate sensors to detect the following hazards: Bomb Detection: Employ appropriate sensors or methods to identify potential explosive devices. Fire Detection: Use flame or heat sensors to identify the presence of fire. Motion Detection: Implement motion sensors to detect movement in the robot's vicinity. Gas Detection: Incorporate gas sensors to identify the presence of hazardous gases. Alert System: Design a system that sends real-time alerts to the user’s mobile device when any of the detected hazards are identified. Bluetooth Communication: Establish a reliable Bluetooth connection between the robot and the Android device for data transmission and control commands. Arduino Integration: Utilize Arduino microcontroller to interface with sensors, process data, and manage communication between the robot and the Android device.

The main blocks of this project are:

1. Arduino UNO Microcontroller.
2. Battery power supply.
3. LED indicator
4. HC-05 BLUETOOTH.
5. METAL sensor
6. DC motors
7. L293d motor driver.
8. PIR sensor.
9. Fire sensor.
10. Gas sensor.

  Software’s used:

• Embedded C programming.
• Arduino IDE compiler for dumping code into Micro controller.
• Express SCH for Circuit design.

Block Diagram:

video: