E&TC / ECE · GSM and GPS · Final year project
DIY 2G Android Phone with Gesture Interface
A homemade mobile phone built on a Raspberry Pi. A touch screen, GSM/GPRS module and battery let it make calls and send messages, with gesture controls and a battery level indicator.
What is the DIY 2G Android Phone with Gesture Interface project?
A homemade mobile phone built on a Raspberry Pi. A touch screen, GSM/GPRS module and battery let it make calls and send messages, with gesture controls and a battery level indicator.
Key facts
- Branch
- Electronics & Telecommunication (E&TC / ECE); also suits Computer & IT
- Domain
- GSM and GPS projects
- Type
- Final year project · Advanced
- Suitable for
- Diploma capstone and B.E / B.Tech final year
- Build time
- 6 to 8 weeks
- Estimated component cost
- ₹6,900 – ₹10,100
- Guidance from
- ₹9,999 (Hardware / IoT Final Year)
How the DIY 2G Android Phone with Gesture Interface works
- Rechargeable battery supplies the circuit; a regulator gives the controller and sensors a steady 5 V.
- The Camera module captures images or video for recognition and monitoring.
- The Raspberry Pi 4 runs Linux and the main program, handles the camera, networking and heavier processing such as image recognition.
- The GSM module sends SMS alerts or makes calls to the registered phone number using a normal SIM card.
Block diagram
Inputs
Camera moduleController
Raspberry Pi 4Communication
GSM moduleComponents list and cost
Typical prices from Indian online stores and electronics markets (Lamington Road, Budhwar Peth, SP Road). Buy from one store where you can to save on shipping.
| Component | Qty | What it does | Approx. cost |
|---|---|---|---|
| Raspberry Pi 4 (2 GB) | 1 | Runs Linux and the main program, handles the camera, networking and heavier processing such as image recognition. | ₹4,800 |
| Camera module | 1 | Captures images or video for recognition and monitoring. | ₹650 |
| GSM module (SIM800L) | 1 | Sends SMS alerts or makes calls to the registered phone number using a normal SIM card. | ₹450 |
| Rechargeable battery (12 V 1.3–7 Ah) | 1 | Stores energy and supplies power when mains is absent. | ₹650 |
| Passive components, PCB and wiring kit | 1 | Resistors (assorted), capacitors (assorted), PCB / breadboard and cables, connectors and jumper wires. | ₹310 |
| Wiring, PCB, soldering and enclosure | 1 | Project overhead | ₹450 |
| Demo model base / mounting board | 1 | Project overhead | ₹500 |
| Testing spares and replacements | 1 | Project overhead | ₹300 |
| Estimated total | Varies with brand, quality and city | ₹6,900 – ₹10,100 |
Prices are estimates for budgeting. We confirm the bill of materials when your design is frozen, and components are charged at actual cost with bills.
How much does this project cost?
| Option | What you get | Cost |
|---|---|---|
| Components only | You buy the parts and build it yourself | ₹6,900 – ₹10,100 |
| Hardware / IoT Final Year | Working model or guided build, Circuit diagram and bill of materials, Firmware / code with explanation | from ₹9,999 + components |
| Capstone Project (CPE) | Working project or model, Black book in MSBTE format, Step-by-step explanation | ₹9,999 + components |
| Diploma ITR | 100% working source code, Project report PDF, PPT | ₹1,999 + components |
No GST and no hidden charges. Use the cost calculator for a quote with your deadline and add-ons, or see all plans.
Download the project brief (PDF)
Summary, working, components and cost and viva questions on one branded PDF to show your guide or team. To get it developed, contact us on WhatsApp.
What you submit with this project
- Working model with circuit diagram and program code
- Project report or black book in your university's chapter order (block diagram, circuit, calculations, results)
- Presentation for the review and final viva
- Synopsis for topic approval, if your college asks for one
E&TC / ECE viva questions on this project
What is the aim of the DIY 2G Android Phone with Gesture Interface project?
A homemade mobile phone built on a Raspberry Pi. A touch screen, GSM/GPRS module and battery let it make calls and send messages, with gesture controls and a battery level indicator.
Explain the working of your project in short.
Rechargeable battery supplies the circuit; a regulator gives the controller and sensors a steady 5 V. The Camera module captures images or video for recognition and monitoring. The Raspberry Pi 4 runs Linux and the main program, handles the camera, networking and heavier processing such as image recognition. The GSM module sends SMS alerts or makes calls to the registered phone number using a normal SIM card.
Why did you choose a Raspberry Pi instead of an Arduino?
The Raspberry Pi is a full computer with an operating system, so it can run Python, OpenCV and a web server. An Arduino is a microcontroller that is better for simple real-time control but cannot process images or run multiple programs.
How is the camera image processed?
Frames are captured and processed with OpenCV: converted to grayscale, filtered and passed to a detection or recognition model that labels faces, objects or number plates.
How does the GSM module send an SMS?
The microcontroller sends AT commands over serial, for example AT+CMGF=1 to select text mode and AT+CMGS with the phone number followed by the message. The module transmits it over the mobile network.
How do you calculate battery backup time?
Backup time (hours) ≈ battery capacity (Ah) × voltage × 0.8 efficiency ÷ load power (W). For example, 12 V 7 Ah at 20 W gives about 3.3 hours.
Explain the block diagram of your project.
The input section senses the real-world quantity, the Raspberry Pi 4 processes it according to the program, and the output section acts locally and sends the data or alert wirelessly. The power supply section feeds every block.
Which communication protocols are used between the modules?
UART (serial) for the GSM, GPS, Bluetooth or fingerprint modules. Each protocol was chosen because the module supports it and it uses the fewest pins.
What is the operating voltage of the circuit?
The controller and most sensors work at 5 V (ESP boards and some modules at 3.3 V). The battery powers the board, and a regulator steps it down. Motors and relays get their own supply line so they do not reset the controller.
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Want to build DIY 2G Android Phone with Gesture Interface?
Send your college, deadline and team size. We confirm the scope, cost and what you will submit.