Showing posts with label ESP32-CAM. Show all posts
Showing posts with label ESP32-CAM. Show all posts

Friday, 26 June 2026

ESP32-CAM Parking Space Detection System Using AI Cloud API

Parking Space Detection System Using ESP32-CAM with CircuitDigest Cloud
Finding an empty parking space in a busy parking lot can be frustrating. This ESP32-CAM parking space detection system project solves that problem by building a smart parking space detection system using an ESP32-CAM and the CircuitDigest Cloud AI API. Instead of running a complex AI model on the microcontroller, the ESP32-CAM captures an image and sends it to the cloud for analysis. Within seconds, the system identifies occupied and vacant parking spaces and returns the result, making parking management faster and more efficient.

How the System Works

Circuit Diagram of Parking Detection

The system starts when a vehicle approaches the entrance. An ultrasonic sensor detects the vehicle and triggers the ESP32-CAM to capture an image of the parking area. The image is uploaded securely to the CircuitDigest Cloud using an HTTPS request.

The cloud-based AI processes the image and counts the number of occupied and available parking spaces. Once the analysis is complete, the result is sent back to the ESP32. If a parking space is available, the servo motor opens the entrance gate automatically. If the parking area is full, the gate remains closed. Parking status and confidence values are also displayed in the Serial Monitor for monitoring and debugging.

Hardware Used

Hardware Connection of Parking Detection

The project uses simple and affordable hardware components:

  • ESP32-CAM
  • ESP32 Development Board
  • HC-SR04 Ultrasonic Sensor
  • Micro Servo Motor
  • Breadboards
  • Jumper Wires

Since the ESP32-CAM includes both a camera and Wi-Fi connectivity, no additional communication modules are required.

Why Use Cloud AI?

Output Image

Running AI models directly on an ESP32-CAM is difficult because of its limited memory and processing power. Cloud-based inference removes this limitation by performing all image processing on powerful servers.

This approach also eliminates the need to collect datasets, label images, train machine learning models, or optimize neural networks. Developers can simply upload an image and receive accurate parking detection results within seconds.

Key Features

  • Detects occupied and vacant parking spaces automatically
  • Opens the gate only when parking is available
  • Uses cloud AI with no model training required
  • Wireless image upload through built-in Wi-Fi
  • Fast detection with real-time results
  • Easy to integrate into larger smart parking systems

Real-World Applications

This system can be used in apartment complexes, office buildings, shopping malls, educational institutions, and smart city parking projects. It can also be integrated with IoT dashboards, mobile applications, and automated parking guidance systems to provide real-time parking availability.

The ESP32-CAM Parking Space Detection System is a simple yet powerful example of combining IoT with cloud-based AI. By offloading image processing to the cloud, the project delivers accurate parking detection without the complexity of training machine learning models. It is an excellent solution for building affordable, scalable, and intelligent parking systems using readily available hardware.

https://circuitdigest.com

Robotics Projects |Arduino Projects | Raspberry Pi Projects|

Tuesday, 16 June 2026

ESP32-CAM for Face Detection Using CircuitDigest Cloud

Face detection has become a common feature in modern technology. From smart doorbells and security systems to attendance tracking and visitor monitoring, the ability to detect human faces is now more accessible than ever. What once required expensive hardware and powerful computers can now be achieved using a compact ESP32-CAM module and a cloud-based AI service.

In this project, we build an ESP32-CAM Face Detection System that captures an image, uploads it to the CircuitDigest Cloud Face Detection API, and returns the number of faces detected along with confidence scores. The best part? There’s no need to train machine learning models or collect datasets. The cloud handles all the heavy lifting.

How the Face Detection System Works

Try API Tested Image

The workflow is surprisingly simple. When a push button connected to the ESP32-CAM is pressed, the camera captures an image. This image is then sent to the CircuitDigest Cloud using an HTTPS request. The cloud-based AI analyzes the image, detects any visible faces, and sends the results back to the ESP32-CAM.

The ESP32-CAM receives the response and displays the face count on the Arduino Serial Monitor. Within a few seconds, you know whether the image contains one face, multiple faces, or none at all.

Why Use Cloud-Based Face Detection?

Traditional face detection projects often involve collecting image datasets, training machine learning models, optimizing them for embedded hardware, and deploying them. This process can take days or even weeks.

With CircuitDigest Cloud, you simply upload an image and receive the detection results through an API. This dramatically reduces development time and allows you to focus on building your application rather than managing AI models.

Some benefits include:

  • No machine learning training required
  • Faster project development
  • Improved detection accuracy
  • Works on low-cost hardware
  • Automatic cloud-side model updates

Hardware Requirements

One of the reasons this project is beginner-friendly is its minimal hardware requirement.

You'll need:

  • ESP32-CAM module
  • Push button
  • Breadboard
  • Jumper wires

The push button is used to trigger image capture, while the ESP32-CAM handles image acquisition and cloud communication.

Potential Applications

Although simple, this project can be expanded into many practical systems.

A smart doorbell can detect visitors before triggering notifications. Attendance systems can count people entering a classroom or meeting room. Retail stores can use it for visitor counting, while security systems can generate alerts whenever a face is detected in restricted areas.

Because the system uses cloud processing, it can also serve as a foundation for more advanced computer vision applications in the future.

Things to Keep in Mind

Like most cloud-based AI systems, this project requires an active internet connection. Image quality also plays an important role in detection accuracy. Poor lighting, blurry images, or partially visible faces can reduce performance. Additionally, API usage limits may apply depending on your subscription plan.

The ESP32-CAM Face Detection System shows how easy it has become to integrate AI into embedded projects. By combining an inexpensive camera module with a cloud-based face detection API, you can build a functional computer vision system without needing advanced AI knowledge.

Whether you're experimenting with ESP32-CAM projects, learning about computer vision, or building a smart security solution, this project provides an excellent starting point. It is affordable, easy to build, and demonstrates the power of combining IoT hardware with cloud-based artificial intelligence. 

https://circuitdigest.com

Robotics Projects |Arduino Projects | Raspberry Pi Projects|

Saturday, 13 June 2026

Build a Smart Waste Detector Using ESP32-CAM and CircuitDigest Cloud

ESP32 Cam Waste Detection System

Waste segregation is one of those tasks that sounds simple but becomes challenging when done at scale. Every day, biodegradable waste like food scraps and leaves gets mixed with non-biodegradable waste such as plastic bottles, wrappers, and cans. Once mixed, recycling becomes harder, processing costs increase, and a large amount of waste ends up in landfills.

To tackle this problem, we built a compact ESP32-CAM waste detection system that uses image processing and cloud-based AI to identify whether waste is biodegradable or non-biodegradable within seconds. The system is low-cost, beginner-friendly, and can serve as a foundation for future smart waste management projects.

How the Waste Detection System Works

The project uses an ESP32-CAM module to capture an image whenever a push button is pressed. Instead of processing the image locally, the ESP32-CAM uploads it through Wi-Fi to the CircuitDigest Cloud Waste Detection API. The cloud platform analyzes the image using a pre-trained AI model and returns the classification result.

Once the result is received, the system provides an immediate visual indication:

  • Green LED → Biodegradable waste detected
  • Red LED → Non-biodegradable waste detected

The classification result is also displayed on the Serial Monitor for debugging and monitoring purposes.

Hardware Required

Circuit Diagram for ESP32 Cam Based Waste Detection

One of the biggest advantages of this project is its simplicity. The entire setup requires only a few components:

  • ESP32-CAM module
  • Push button
  • Red LED
  • Green LED
  • 220Ω resistors
  • Breadboard and jumper wires

The push button is used to trigger image capture, while the LEDs provide quick visual feedback about the detected waste category.

Why Use Cloud AI?

Try API Tested Image

Traditional machine learning workflows often require collecting datasets, labeling images, training models, optimizing them, and deploying them to hardware. For beginners, this process can be overwhelming and time-consuming.

With CircuitDigest Cloud, all of that complexity is removed. The AI model is already trained and hosted on the cloud. Your ESP32-CAM simply captures an image and sends it through an HTTPS request. The server handles the heavy image processing and sends back the result.

This approach offers several benefits:

  • No dataset collection required
  • No model training needed
  • Faster project development
  • Better accuracy through cloud processing
  • Automatic model improvements without reflashing firmware

Applications

Although simple, this project has several practical applications:

  • Smart waste segregation bins
  • Automated recycling systems
  • Environmental monitoring projects
  • Educational AI and IoT demonstrations
  • Smart city waste management solutions

The same concept can also be expanded into larger systems that automatically sort waste using robotic mechanisms or conveyor belts.

Challenges and Limitations

Like any cloud-based system, this project requires an active internet connection. Image quality also plays an important role in detection accuracy. Poor lighting, blurry images, or improper camera positioning can affect classification results. Additionally, API usage limits may apply depending on the service plan.

The ESP32-CAM Waste Detection System demonstrates how AI and IoT can work together to solve real-world environmental problems. By combining an inexpensive camera module with cloud-based image recognition, the system can identify waste categories in just a few seconds without requiring complex machine learning knowledge.

Whether you're learning about AI, exploring ESP32-CAM projects, or building a smart waste management solution, this project is a great example of how modern cloud services can simplify advanced computer vision applications while keeping hardware costs low. 

https://circuitdigest.com

Robotics Projects |Arduino Projects | Raspberry Pi Projects|

Thursday, 11 June 2026

ESP32-CAM Indian Currency Recognition System for Visually Impaired Users

ESP32 Cam Indian Currency Recognition


Handling cash can be challenging for visually impaired individuals, especially when identifying currency denominations quickly and accurately. While many people rely on touch-based recognition, this becomes more difficult with age as sensitivity decreases. To address this problem, we built an ESP32 Cam Indian Currency Recognition that can identify Indian currency notes and announce their value through a speaker.

This project combines computer vision, cloud-based intergration, and voice feedback to create a simple assistive device that helps users handle money independently. Instead of manually training machine learning models, the system uses the CircuitDigest Cloud Currency Recognition API, making the implementation much easier for beginners.

How the System Works

ESP32 Cam Indian Currency Recognition Circuit Diagram


The project is built around the ESP32-CAM module, which captures an image of the currency note when a push button is pressed. The captured image is sent over Wi-Fi to the cloud-based currency recognition API. The cloud analyzes the image, identifies the denomination, and returns the result to the ESP32-CAM.

Once the denomination is detected, the ESP32-CAM uses Google Text-to-Speech (TTS) to generate an audio announcement. The audio signal is amplified using a PAM8403 amplifier and played through a speaker, allowing users to hear the value of the note instantly.

Hardware Required

ESP32 Cam Indian Currency Recognition Hardware Connection

The hardware setup is intentionally simple and requires only a few components:

  • ESP32-CAM module
  • PAM8403 audio amplifier
  • Speaker
  • Push button

The push button triggers image capture, while the amplifier ensures clear audio output from the speaker.

Why Use Cloud-Based Recognition?

Many AI-based currency recognition projects require collecting hundreds of currency images, labeling datasets, training machine learning models, and optimizing them for embedded devices. This process can take days or even weeks.

With CircuitDigest Cloud, all of that complexity is removed. The pre-trained model is already available, allowing developers to focus on hardware integration rather than machine learning. The ESP32-CAM simply captures an image and sends it to the cloud for processing.

Key Features

  • Recognizes Indian currency notes automatically
  • Supports ₹10, ₹20, ₹50, ₹100, ₹200, and ₹500 denominations
  • Announces detected values through a speaker
  • No machine learning training required
  • Simple hardware design
  • Beginner-friendly implementation

Applications

This project can be useful in several real-world situations:

  • Assisting visually impaired individuals in handling cash
  • Helping elderly people identify currency notes
  • Smart assistive devices for accessibility
  • Voice-enabled financial assistance tools

The ESP32-CAM Indian Currency Recognition System demonstrates how ESP32 and IoT can be used to create practical solutions for everyday challenges. By combining image capture, cloud-based currency recognition, and voice feedback, the system provides an easy and affordable way for visually impaired users to identify Indian currency independently. With minimal hardware and no need for machine learning expertise, this project serves as an excellent introduction to AI-powered embedded systems while delivering meaningful real-world value. 

https://circuitdigest.com 

Robotics Projects |Arduino Projects | Raspberry Pi Projects|


Wednesday, 27 May 2026

ESP32-CAM Helmet Detection Using CircuitDigest Cloud

Helmet Detection with ESP32-Cam using CircuitDigest cloud

Road safety monitoring is becoming increasingly important, especially in busy traffic areas where manually checking every rider is nearly impossible. This ESP32-CAM Helmet Detection project offers a smart and affordable solution by combining the ESP32-CAM module with the CircuitDigest Cloud AI API.

Instead of running heavy machine learning models directly on the ESP32-CAM, the system uses cloud-based AI processing. The ESP32-CAM captures an image, uploads it to the CircuitDigest Cloud, and receives helmet detection results within seconds. The system can identify helmeted riders, riders without helmets, and even count motorbikes in the frame.

How the ESP32-CAM Helmet Detection System Works

The workflow of this smart helmet detection system is simple and efficient.

When the system powers ON:

  • A green LED glows for a few seconds, indicating that the system is ready.
  • A red LED then turns ON briefly before image capture.
  • The ESP32-CAM captures a JPEG image and uploads it securely to the CircuitDigest Cloud API.

The cloud server processes the image using AI object detection models and returns results in JSON format. These results are sent as a WhatsApp alert with the captured image and helmet status.

The best part is that no AI model training is required. The CircuitDigest Cloud already provides a ready-to-use API endpoint.

Components Required

Circuit Diagram of Helmet Detection with ESP32 Cam

This project uses only a few components:

  • ESP32-CAM Module
  • Red LED
  • Green LED
  • Breadboard
  • Jumper Wires

If you are using a standard ESP32-CAM board without onboard USB, you will also need an FTDI programmer for code upload.

Why Use Cloud-Based AI Instead of Local AI?

Running object detection models directly on microcontrollers usually requires high memory and processing power. Since the ESP32-CAM has limited resources, cloud AI processing becomes a better option.

Advantages of Cloud AI:

CircuitDigest Home Page
  • Faster detection
  • Better accuracy
  • No model training required
  • Lower hardware cost
  • Easy API integration

This makes the project beginner-friendly while still delivering professional-level results.

Hardware Setup

The ESP32-CAM is connected to two LEDs for system indication:

  • Green LED → System ready
  • Red LED → Image capture phase

After uploading the code, the ESP32-CAM automatically connects to WiFi and starts the detection process.

ESP32-CAM Helmet Detection Code

The Arduino code handles:

  • WiFi connection
  • Camera initialization
  • HTTPS image upload
  • JSON response handling
  • WhatsApp notification sending

The image is uploaded securely using multipart/form-data requests, along with the API authentication key.

Once the cloud server processes the image, the ESP32-CAM extracts the result and sends an alert if a rider is detected without a helmet.

WhatsApp Alert Feature

CircuitDigest Cloud API Helmet Detection

One of the most interesting parts of this project is the WhatsApp alert system. Whenever a rider without a helmet is detected, the system sends:

  • Helmet status
  • Captured image
  • Location details
  • Timestamp

This makes the setup useful for traffic monitoring and smart surveillance applications.

Applications of Helmet Detection System

This ESP32-CAM AI project can be used in:

  • Traffic monitoring systems
  • Smart city surveillance
  • Industrial safety monitoring
  • Parking areas
  • Campus safety systems

This ESP32-CAM Helmet Detection project demonstrates how cloud AI can simplify complex computer vision tasks on low-cost hardware. By combining the ESP32-CAM with CircuitDigest Cloud APIs, you can build a smart and practical helmet detection system without expensive processors or AI training.

https://circuitdigest.com 

Robotics Projects |Arduino Projects | Raspberry Pi Projects|

Friday, 15 May 2026

Smart ESP32-CAM Attendance System with WhatsApp Alerts

Smart ESP32-CAM Attendance System with WhatsApp Alerts

Attendance systems are still handled manually in many classrooms and offices. Teachers call out names, students respond one by one, and records are written down manually. It works, but it wastes time and can easily lead to mistakes. This ESP32-CAM Attendance System solves that problem by automating the entire process using Wi-Fi, image capture, and WhatsApp notifications.

The project ESP32-CAM attendance system is built using an ESP32-CAM, an OLED display, and a rotary encoder. The ESP32-CAM acts as both the controller and camera module, making the setup compact and affordable.

How the System Works

Circuit Diagram of Attendance System

Once powered on, the ESP32-CAM connects to Wi-Fi and synchronizes the current time using an NTP server. The OLED display then shows a list of stored student names.

A student uses the rotary encoder to:

  • Scroll through names
  • Select their name
  • Choose either “IN” or “OUT”

After selection, the system starts a short countdown and captures an image using the ESP32-CAM. The captured image, along with the student’s name, entry/exit status, and timestamp, is then sent through the CircuitDigest Cloud API.

Within seconds, a WhatsApp message is delivered to the registered phone number with complete attendance details and photo proof.

Components Used

Components Required for Attendance System

The hardware setup is simple and beginner friendly.

Main components:

  • ESP32-CAM
  • SSD1306 OLED display
  • Rotary encoder
  • Perfboard
  • Project enclosure

If you are using a standard ESP32-CAM without onboard USB, an FTDI programmer is required for uploading the code.

Why This Project Is Useful

Unlike traditional attendance systems, this project provides image verification along with accurate timestamps. That makes the records more secure and reliable.

Some advantages include:

  • Faster attendance process
  • Reduced manual work
  • Real-time WhatsApp alerts
  • Automatic timestamp recording
  • Compact and low-cost hardware

This system can be used in:

  • Schools and coaching centres
  • Offices
  • Hostels
  • Libraries
  • Event check-in systems

Future Improvements

The project can be expanded further with advanced features like:

  • Face recognition
  • RFID or fingerprint authentication
  • Cloud database storage
  • GPS tracking
  • Mobile app support

These upgrades can make the system even smarter and more secure.

This ESP32-CAM Attendance System is a practical IoT project that combines automation, image capture, and cloud communication into one compact setup. Instead of relying on paper registers and manual verification, the system records attendance instantly and sends updates directly through WhatsApp.

It’s an excellent project for beginners and makers who want to explore IoT, ESP32 programming, cloud APIs, and real-world automation applications. 

https://circuitdigest.com 

Robotics Projects |Arduino Projects | Raspberry Pi Projects|

Tuesday, 12 May 2026

ESP32-CAM Image Capture and Email Alert System

 

ESP32 Cam Capture Image and Send Email

The ESP32-CAM is one of the most useful boards for IoT camera projects. It’s compact, affordable, and comes with built-in WiFi and a camera module, making it perfect for remote monitoring applications. In this project, we use the ESP32-CAM to capture an image and send it directly to an email using the CircuitDigest Cloud Email API.

Instead of using complicated mail servers or heavy cloud platforms, this ESP32 Cam capture image and send email setup keeps things simple. A push button is used to capture the image, and another button sends the photo instantly over WiFi. The OLED display provides live feedback during the entire process, making the system easy to operate and beginner friendly.

How the System Works

Circuit Diagram Image Capture and Transfer using Email

The project uses the ESP32-CAM as the main controller. It handles:

  • Camera operation
  • WiFi communication
  • OLED display updates
  • Secure email transfer

When the capture button is pressed, the camera takes a photo and stores it temporarily in memory. The OLED display shows a status message so the user knows the image has been captured successfully.

After that, pressing the send button uploads the image to CircuitDigest Cloud through a secure HTTPS request. The cloud platform then forwards the image to the registered email address as an attachment.

The process feels fast and seamless:
Capture → Upload → Receive Email.

Components Required

Hardware Connection For The Photo Capture and Email System

The hardware setup is simple and uses only a few components:

  • ESP32-CAM module
  • OLED display (I2C)
  • Push buttons
  • Breadboard
  • Jumper wires

If you're using a standard ESP32-CAM without onboard USB support, you’ll also need a USB-to-Serial converter for programming.

Hardware Setup

The connections are straightforward. The OLED display is connected using the I2C interface, while the push buttons are connected to GPIO pins for user input.

One button handles image capture, while the second button triggers email transmission.

The OLED helps by displaying messages like:

  • Booting
  • Capturing
  • Sending
  • Success or error notifications

This makes debugging and monitoring much easier.

Image Capture and Email Flow

Once powered on, the ESP32-CAM connects to WiFi and initializes the camera module.

Here’s the complete workflow:

  1. User presses the capture button
  2. Camera captures an image
  3. OLED confirms successful capture
  4. User presses the send button
  5. ESP32-CAM uploads image securely
  6. CircuitDigest Cloud delivers the email

The received email contains the captured image as an attachment.

Why This Project Is Useful

This setup can be used in many practical applications:

  • Smart security systems
  • Visitor verification systems
  • Motion-triggered alerts
  • Remote monitoring
  • IoT evidence collection

Because the image is sent instantly over WiFi, it works well for real-time monitoring applications.

This ESP32-CAM Email Alert project is a great example of combining embedded systems with cloud communication. It’s simple to build, practical for real-world use, and a solid introduction to camera-based IoT applications.

With just a few components and WiFi connectivity, you can create a smart system capable of capturing and sending images from anywhere in real time.

https://circuitdigest.com 

Robotics Projects |Arduino Projects | Raspberry Pi Projects|


Friday, 17 April 2026

ESP32-CAM WhatsApp Image Alert System – Capture & Send Photos Instantly

Send an Image Via WhatsApp Using ESP32-CAM

We use WhatsApp every day without even thinking about it. Sending messages, sharing photos, and staying connected has become second nature. But what if your electronics project could do the same - capture an image and send it directly to WhatsApp?

That’s exactly what this project Esp32 Cam whatsapp message does. Using an ESP32-CAM and CircuitDigest Cloud, you can build a simple system that captures an image and sends it to your phone instantly.

What This Project Does

This setup turns your ESP32-CAM into a smart alert system. With just a push button, the module captures an image and sends it to a WhatsApp number in real time.

No GSM module. No complex APIs. Just WiFi and a simple HTTPS request.

Press a button → capture image → send to WhatsApp

Simple as that.

How It Works

Circuit-Diagram-of-ESP32-based-image-Sent-in-Whatsapp

The working principle is straightforward and efficient.

A push button is connected to GPIO13. When you press it, the ESP32-CAM triggers the camera and captures an image using its onboard sensor and flash LED. The image is then processed and sent to CircuitDigest Cloud using a secure HTTP request.

The cloud platform handles everything else-formatting the message and delivering the image directly to WhatsApp.

Your microcontroller doesn’t deal with WhatsApp directly. It just sends the data, and the cloud does the heavy lifting.

Components You’ll Need

The hardware setup is minimal:

  • ESP32-CAM module
  • Push button
  • Breadboard
  • Jumper wires
  • 5V power supply

If your ESP32-CAM doesn’t have a USB interface, you’ll need a USB-to-Serial converter for programming.

Hardware Setup

The connections are clean and beginner friendly. The push button is wired to GPIO13 and ground, using an internal pull-up configuration in code. The onboard flash (GPIO4) is used to illuminate the scene during image capture.

Once powered, the system is ready to respond to a button press and trigger image capture instantly.

Behind the Code

The code is structured into simple logical blocks.

First, it connects to WiFi using your credentials. Then it initializes the camera with proper settings like resolution, JPEG format, and memory handling.

When the button is pressed, the system:

  • Captures an image
  • Stores it in memory
  • Turns on flash briefly for better clarity
  • Sends the image via HTTPS

The image is sent as multipart form data along with your API key and template ID. Once received, the cloud platform delivers it to your WhatsApp number.

What You’ll See

When everything is set up, pressing the button will instantly send a WhatsApp message with the captured image.

You’ll receive:

  • The image captured in real time
  • Event details (like trigger action)

It feels just like someone sent you a photo - except it came from your project.

Real-World Applications

This project isn’t just a demo - it’s actually useful.

You can use it for:

  • Home security alerts
  • Doorbell camera systems
  • Intrusion detection
  • Wildlife monitoring
  • Smart automation triggers

Anywhere you need instant visual feedback, this system fits perfectly.

Things to Keep in Mind

Stable power is important. The ESP32-CAM can be sensitive to voltage drops, so a reliable 5V supply is recommended.

Also, make sure your WiFi connection is strong enough for smooth image transmission.

This project is a great example of combining IoT with real-world communication tools. It takes something we use daily - WhatsApp - and integrates it with embedded systems in a practical way.

With just a few components and simple code, you can build a smart system that captures and shares moments automatically. It’s simple, powerful, and a lot of fun to build.

Friday, 27 February 2026

Indian Currency Recognition using ESP32-CAM and Edge Impulse

 

ESP32 CAM Currency Recognition System using Edge Impulse

Artificial Intelligence is no longer limited to powerful computers or cloud servers. Today, even compact and affordable boards like the ESP32-CAM can perform real-time image recognition. In this project, we build an ESP32 CAM Currency Recognition capable of identifying currency denominations using Edge AI (TinyML) directly on the device.

This system captures images using the ESP32-CAM, processes them locally using a trained machine-learning model, and identifies the currency note placed in front of the camera. LEDs provide instant visual feedback, while the Serial Monitor displays the detected denomination.

What You’ll Learn

  • TinyML and Edge AI concepts
  • ESP32-CAM camera interfacing
  • Dataset collection and labelling
  • Model training using Edge Impulse
  • Deploying AI models on microcontrollers

How ESP32-CAM Currency Recognition Works

The ESP32-CAM captures an image of the currency note and runs a trained machine-learning model locally. Instead of sending images to the cloud, processing happens directly on the device — known as AI on Edge.

The trained model recognises visual features such as:

  • Colour patterns
  • Text layout
  • Design elements
  • Security markings

Once a denomination is detected:

  • The corresponding LED glows
  • The detected value appears in the Serial Monitor

This enables fast, private, and offline recognition.

Components Required

  • ESP32-CAM Module
  • USB-to-Serial Converter
  • LEDs (for denomination indication)
  • 100Ω Resistors
  • Breadboard
  • Jumper Wires
  • Arduino IDE
  • Edge Impulse Studio
Circuit Diagram of Currency recognition System

System Workflow

The project follows three major stages:

1. Dataset Collection

Images of Indian currency notes (₹10, ₹20, ₹50, ₹500, etc.) are captured using the ESP32-CAM web interface.
A plain background and proper lighting improve accuracy.

2. Model Training using Edge Impulse

Images are uploaded and labelled in Edge Impulse.
The platform:

  • Processes image features
  • Trains an object detection model
  • Evaluates accuracy using performance metrics

The trained model is then exported as an Arduino library.

3. Deployment on ESP32-CAM

The trained model is uploaded through Arduino IDE.
After deployment, the system works completely offline.

Hardware Setup of Currency Recognition System

Hardware Setup

The ESP32-CAM connects to a USB-to-Serial converter for programming. LEDs are connected to GPIO pins through resistors, where each LED represents a specific currency denomination.

When a note is placed under the camera:

  • Image is captured
  • Model processes the frame
  • Matching denomination LED turns ON

Real-World Performance

For reliable detection:

  • Keep the camera fixed at a stable angle
  • Maintain consistent lighting
  • Ensure the full note is visible

Under proper conditions, the system successfully recognises different Indian currency notes in real time.

Applications

  • Assistive device for visually impaired users
  • Automated retail currency validation
  • Smart vending machines
  • Currency counting systems

This ESP32-CAM Currency Recognition project demonstrates how embedded AI and TinyML can bring intelligent vision capabilities to low-cost hardware. Using Edge Impulse simplifies the entire workflow - from data collection to deployment - making edge AI accessible even for students and hobbyists.

By combining computer vision with microcontrollers, this project opens the door to real-world applications in automation, accessibility, and smart financial systems. It’s a powerful example of how modern embedded systems can see, analyse, and respond intelligently - all without the cloud.

https://circuitdigest.com 

Robotics Projects |Arduino Projects | Raspberry Pi Projects|