Smart Wi-Fi Video Doorbell using ESP32 and Camera
The topic of security systems is currently one of the most investigated fields in today's society. In response to the growing number of security risks, many organizations are developing i…
Know the mission before touching a wire.
Understand what you are making, prepare the right tools, and make the workbench safe.
Project details
Smart Wi-Fi Video Doorbell using ESP32 and Camera is a iot project. The topic of security systems is currently one of the most investigated fields in today's society. In response to the growing number of security risks, many organizations are developing i…
- Source pages
- 1363-1367
- Named parts
- 5
- Build goal
- Working, tested prototype
Tools you need
- Digital multimeter
- Wire stripper and side cutters
- Soldering iron with a fine tip
- Current-limited bench supply
- Computer with a data-capable USB cable
Use eye protection, good lighting, and a clean insulated surface throughout the build.
Safety precautions
- Disconnect every power source before changing a connection.
- Check component polarity, pinout, and supply voltage twice.
- Use a current limit for the first power-up.
- This project may involve hazardous voltage. Work only with qualified supervision and proper isolation.
Gather, identify, and understand every part.
Use the standardized inventory, then open What's this? to learn each part's role, advantages, limitations, handling, and specifications.
What's this?Image, role, pros, cons, handling & specifications
ESP32-CAM
A programmable controller that reads inputs, makes decisions, and drives the project's outputs.
What it does hereIt is the control centre and must use the documented board, pin map, supply, and logic level.
Buy / compare this part ↗Advantages
- Reprogrammable and reusable
- Large learning ecosystem
- Complex behaviour remains changeable
Limitations
- GPIO voltage and current are limited
- Some pins affect boot or communication
- Loads normally need a driver
Handling
- Disconnect power before rewiring
- Avoid static discharge
- Never power motors, relays, or pumps directly from GPIO
Specifications to verify
- Use the exact model, value, package, and rating listed for ESP32-CAM; similar-looking parts are not always interchangeable.
- Confirm operating voltage, logic level, pinout, memory, USB interface, and maximum GPIO current.
What's this?Image, role, pros, cons, handling & specifications
FTDI Programming Board
A named project component whose exact role is defined by the source circuit and build guide.
What it does hereIt performs a documented electrical, control, interface, or construction function in this project.
Buy / compare this part ↗Advantages
- Selected for this project
- Can be checked independently
- Supports modular troubleshooting
Limitations
- Substitutes may differ
- Generic names can hide variants
- Pinouts and ratings vary
Handling
- Compare the received part with the source
- Keep it labelled
- Do not force connectors or adjusters
Specifications to verify
- Use the exact model, value, package, and rating listed for FTDI Programming Board; similar-looking parts are not always interchangeable.
- Confirm dimensions, ratings, connection method, polarity, and environmental limits.
What's this?Image, role, pros, cons, handling & specifications
V AC to 5V DC Converter
A named project component whose exact role is defined by the source circuit and build guide.
What it does hereIt performs a documented electrical, control, interface, or construction function in this project.
Buy / compare this part ↗Advantages
- Selected for this project
- Can be checked independently
- Supports modular troubleshooting
Limitations
- Substitutes may differ
- Generic names can hide variants
- Pinouts and ratings vary
Handling
- Compare the received part with the source
- Keep it labelled
- Do not force connectors or adjusters
Specifications to verify
- Use the exact model, value, package, and rating listed for V AC to 5V DC Converter; similar-looking parts are not always interchangeable.
- Confirm dimensions, ratings, connection method, polarity, and environmental limits.
What's this?Image, role, pros, cons, handling & specifications
Buzzer
An output component turns an electrical control signal into light, sound, motion, switching, or displayed information.
What it does hereIt presents the circuit result or acts on the physical world.
Buy / compare this part ↗Advantages
- Makes system state visible
- Can be tested separately
- Supports clear troubleshooting
Limitations
- Loads may exceed controller current
- Polarity or driver direction can matter
- Inductive loads create voltage spikes
Handling
- Use the documented driver stage
- Check polarity and load current
- Add flyback protection for inductive loads
Specifications to verify
- Use the exact model, value, package, and rating listed for Buzzer; similar-looking parts are not always interchangeable.
- Confirm voltage, current, polarity, interface, driver requirements, and duty cycle.
What's this?Image, role, pros, cons, handling & specifications
Push Button
A named project component whose exact role is defined by the source circuit and build guide.
What it does hereIt performs a documented electrical, control, interface, or construction function in this project.
Buy / compare this part ↗Advantages
- Selected for this project
- Can be checked independently
- Supports modular troubleshooting
Limitations
- Substitutes may differ
- Generic names can hide variants
- Pinouts and ratings vary
Handling
- Compare the received part with the source
- Keep it labelled
- Do not force connectors or adjusters
Specifications to verify
- Use the exact model, value, package, and rating listed for Push Button; similar-looking parts are not always interchangeable.
- Confirm dimensions, ratings, connection method, polarity, and environmental limits.
Connect one verified path at a time.
Explore the named components and standardized signal flow, then use Source Check to verify exact physical pins, values, and topology before applying power.
Trace this circuit.
Smart Wi-Fi Video Doorbell using ESP32 and Camera: interactive parts, standardized terminals, responsive anchored wires, student explanations, and the original circuit reference in one shared system.
Trace before wiring
Follow power, ground, inputs, processing, and outputs in that order. Never guess a pin from package shape alone.
Connect with power off
Make short, labelled connections and share a common ground only where the schematic requires it.
Inspect every joint
Check continuity, polarity, adjacent shorts, and loose connections before the first power-up.
Open all source diagrams and build views 4 visuals
Confirm the hardware-only control path.
This project does not include firmware in the source. The circuit itself provides the required behaviour.
How to connect
- Match every controller label to the circuit view and source pin map.
- Join grounds before signal wires when separate low-voltage supplies are used.
- Keep motors, relays, pumps, and other loads on a suitable driver and external supply.
Common mistakes
Reversed VCC/GND, board-label versus GPIO-number confusion, missing common ground, and charge-only USB cables.
Troubleshoot
Disconnect loads, continuity-test one path at a time, then test with a current limit.
Software preparation
No IDE, board package, library, or firmware upload is required for this project.
If you add a programmable controller as an extension, document its pin map separately.
How to upload code
The original design is implemented entirely in hardware, so proceed after verifying the circuit and supply.
Assemble, deploy, test, and troubleshoot.
Use the complete source notes in build order, then pass the final checks before calling the project finished.
Build in functional stages
- Power and regulation
- Controller or processing stage
- Inputs and sensors
- Outputs and loads
- Enclosure and strain relief
Power up safely
- Inspect unpowered continuity first
- Apply the lowest safe current limit
- Measure supply rails before signals
- Add one load at a time
- Record expected and actual results
Work from simple to complex
- Confirm power, ground, polarity, and orientation
- Compare each pin with the source
- Test inputs separately from outputs
- Replace only one variable at a time
- Power off before every correction
Follow the documented instructions.
These notes come from this project's source and remain in their original order.
Project overview
Project build noteThe topic of security systems is currently one of the most investigated fields in today's society. In response to the growing number of security risks, many organizations are developing innovative, high-tech security products. IoT is an extra advantage in this industry that, in the event of any emergency, can immediately trigger an event, such as calling the police, fire brigade, or your neighbor. In the past, we have constructed a wide variety of security systems, such as an IoT-based door security alarm, a wireless doorbell, a video surveillance camera, and a Raspberry Pi-based visitor monitoring system. Using an ESP32 and a camera, we will construct a smart Wi-Fi door bell in this lesson. After learning about ESP32-CAM and how to utilize it for video streaming in a previous lesson, we will now use ESP32-CAM to create a smart Wi-Fi video doorbell. This AC-powered "smart" doorbell not only alerts you to
visitors at your door by playing a custom tune on your phone, but it also sends you a text message with a link to a live video feed so you can see who's there from anywhere in the globe.
Components Required
Project build noteESP32-CAM FTDI Programming Board 220V AC to 5V DC Converter Buzzer Push Button
Circuit Diagram
Project build noteThe Smart Wi-Fi Doorbell has a very straightforward circuit schematic; all you need to do is connect two LEDs, a push button, and a buzzer to the GPIO pins on the ESP32 board. When a button is pressed, the sound is produced by a buzzer that is attached to the button. The status of the network may be seen through one of the LEDs, while the status of the power supply can be seen through the other LED. If the ESP is connected to a network, the Network LED will be on, and if it is not, it will blink. The Wi-Fi video doorbell system will look like this when it is housed in the
3D-printed casing
Project build noteIFTTT Setup for Wi-Fi Doorbell IFTTT is a free web-based service that enables users to create chains of simple conditional statements, which are referred to as "recipes." These chains are triggered based on changes to other web services, such as Gmail, Facebook, Instagram, and Pinterest. IFTTT is a service that allows users to
create chains of simple conditional statements. "If This Then That" is what "IFTTT" stands for as an abbreviation. IFTTT is being used in this project to trigger the sending of an email whenever the temperature or humidity reaches a threshold that was previously determined. In the past, we utilized IFTTT in several IoT-based projects to send emails or SMS on specific occurrences, such as when there was excessive use of electricity, when there was a high pulse rate, when an intruder entered the building, etc. To begin, head over to IFTTT and either sign in with your existing credentials or create a new account if you don't already have one. Now search for "Webhooks," and when you find it, click on the Webhooks section under Services. Testing the Smart Wi-Fi Doorbell
After the circuit has been assembled, the doorbell must be powered by means of an AC outlet. Now, anytime the button for the Internet of Things doorbell is touched, the smartphone starts playing a song named '123,' and a message will be received with a link of a webpage as shown below, where the live video feed may be seen.
You built Smart Wi-Fi Video Doorbell using ESP32 and Camera.
You followed the full workflow from understanding the mission to testing the finished project. That is a real engineering achievement - well done.
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