The purpose of this project is to build Spy Robot using raspberrypi4 processor and a camera. The user can control the robot through the inputs from the web browser. Also, if there is any person near the robot, it senses it with the help of SR04 ultrasonic sensor which in turn operates the camera shield i.e., hides the camera in the presence of humans. This project consists of pi camera mainly focuses on image processing; video capture and analysis including features like face detection and object detection. Therefore, live streaming around the robot section is done the video capture feature of Pi camera. In this project we are using python language to write the program. Python is an interpreter, object-oriented, high-level programming language with dynamic semantics. Python's simple, easy to learn syntax emphasizes readability and therefore reduces the cost of program maintenance. Python supports modules and packages, which encourages program modularity and code reuse. The controlling device of the whole unit is a Raspberrypi4 processor to which input and output modules are interfaced. Raspberry Pi 4 has Broadcom BCM2711, Quad core Cortex-A72 (ARM v8) 64-bit SoC @ 1.8GHz 1GB, 2GB, 4GB or 8GB LPDDR4-3200 SDRAM (depending on model) 2.4 GHz and 5.0 GHz IEEE 802.11ac wireless, Bluetooth 5.0, BLE Gigabit Ethernet.   The processor is programmed in PYTHON language which intelligently performs the specific task. Here, the processor gets input from the web browser with which it controls the robot movement. Also, the pi camera in the robot section takes the video of the robot surroundings that is being sent to the web browser initializing live streaming. This input is processed by processor and acts appropriately on the motors of the Robot. Also, if there is any person near the robot, it senses it with the help of SR04 ultrasonic sensor which in turn operates the camera shield i.e., hides the camera in the presence of humans.

    The major features of this project are:

1. Using Raspberrypi4 processor to achieve this task.
2. Using pi camera.
3. Using DC motors to moves the robot.
4. Using L293d motor driver to change the direction of vehicle.
5. SR04 Ultrasonic sensor to detect human presence
6. Servomotor to hide or unhide the camera

The major building blocks of this project:

• Battery power supply.
• Raspberry Pi4 Processor.
• SD Card.
• Pi camera.
• LED indicators.
• DC motors with L293d motor driver.
• SR 04 Ultrasonic Sensor
• Servomotor for camera shield

Software’s used in the project:

1. Python Programming.
2. Embedded Linux operating system.
3. Express SCH for Circuit design.

   

     

Block Diagram:    

 

     

 

video: