Heart Beat Monitoring over Internet using Arduino and ThingSpeak
ThingSpeak The objective of this project is to create a Heart Beat Detection System using Arduino which will detect the heartbeat with the help of a pulse sensor and display the results o…
Know the mission before touching a wire.
Understand what you are making, prepare the right tools, and make the workbench safe.
Project details
Heart Beat Monitoring over Internet using Arduino and ThingSpeak is a arduino project. ThingSpeak The objective of this project is to create a Heart Beat Detection System using Arduino which will detect the heartbeat with the help of a pulse sensor and display the results o…
- Source pages
- 755-761
- Named parts
- 8
- 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.
- Keep liquids, loose metal, and uninsulated wires away from the bench.
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
Pulse sensor
A sensor converts a physical condition into an electrical signal the circuit can measure.
What it does hereIt provides project input as an analogue, digital, resistive, frequency, or calibrated signal.
Buy / compare this part ↗Advantages
- Adds real-world awareness
- Can usually be tested independently
- Often supports calibration
Limitations
- Readings can drift
- Placement affects results
- Some sensors need warm-up or calibration
Handling
- Protect the sensing surface
- Observe supply voltage and polarity
- Keep signal leads away from noisy power wiring
Specifications to verify
- Use the exact model, value, package, and rating listed for Pulse sensor; similar-looking parts are not always interchangeable.
- Confirm supply range, output type, measurement range, accuracy, response time, and pin order.
What's this?Image, role, pros, cons, handling & specifications
Wi-Fi module ESP8266
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 Wi-Fi module ESP8266; 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
Arduino Uno
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 Arduino Uno; 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
LCD
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 LCD; 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
Bread 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 Bread 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
k potentiometer
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 k potentiometer; 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
k resistors
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 k resistors; 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
ohm resistors
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 ohm resistors; 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.
Heart Beat Monitoring over Internet using Arduino and ThingSpeak: 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 6 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 noteThingSpeak The objective of this project is to create a Heart Beat Detection System using Arduino which will detect the heartbeat with the help of a pulse sensor and display the results of the measurement on an LCD connected to the Arduino board. Heart Beats can also be monitored remotely from anywhere in the world via the internet, using the Wi-Fi module ESP8266. With ThingSpeak, you can display the data online, access it when you want and where you want. Previously, we developed a simple Heartbeat Monitor without displaying results online. Our project uses ThingSpeak for remote monitoring, so it falls under the Internet of Things category.
Components Required
Project build notePulse sensor Wi-Fi module ESP8266
Arduino Uno LCD Bread Board 10k potentiometer 1k resistors 220-ohm resistors LED Connecting wires
Circuit Diagram and Explanation
Project build noteIn order to use ESP8266, we need to first connect it to the Arduino. The ESP8266 runs on 3.3V and is not able to function properly if you give it 5V from the Arduino. You need to connect the VCC and CH_PD pins of the Arduino to 3.3V. When we connect ESP8266 directly to the Arduino, its RX pin will not transmit when it operates at 3.3V. Thus, we will need to create a voltage divider so that the 5V can be converted into 3.3V. You can do this by increasing the resistance of three resistors as we did in the circuit. The ESP8266's TX pin is connected to pin 9 of Arduino while its RX pin is connected to pin 10 through the resistors.
Your projects can connect to the internet and Wi-Fi using an ESP8266 Wi-Fi module. Your projects become very powerful with this device, which is very cheap. In the IOT platform, it is among the most prominent devices because it can be used with any microcontroller. Check out this article to learn how you can use an ESP8266 with Arduino. Once the Pulse Sensor is connected to the Arduino, it is ready to be used. I love how easy it is to connect the pulse sensor. An Arduino is connected to the pulse sensor through the ground pin and 5V pin. The signal pin of the pulse sensor is connected to the A0 pin.
ThingSpeak Setup
Project build noteIn regard to IoT projects, ThingSpeak offers a very useful tool. Our systems can be monitored and controlled using ThingSpeak's channel and webpages, which make monitoring and controlling our systems possible. ThingSpeak collects data, analyses it, and develops a response. We have previously used
ThingSpeak in Raspberry Pi weather station projects and Arduino weather station projects. The following is a short description of the IoT Heart Beat Monitoring project as it is implemented using ThingSpeak. Creating an account on ThingSpeak.com is the first step, followed by signing in and clicking on Get Started. Go to channels once you've created an account to create a channel. Put the name of the Channel and the Fields on the paper. You should also check the box below for the Make Public option before saving the channel. You have now successfully created your new channel.
Once you have copied your API key, go to API Keys. It's needed in the code. Examine the full code at the end.
Working Explanation
Project build noteThe pulse sensor must first be attached to any organ of the body where it can readily detect the pulse, like a finger, as shown in the video. As the heart pumps blood into the body, the Pulse Sensor will measure the change in volume of blood. In the same way, the change in blood volume affects the brightness of the light that filters through the organ. Once this change is observed, the Arduino will convert it to heart beats per minute (BPM). Additionally, the LED connected to pin 13 will flash in response to the Heart Beat.
An Arduino will communicate with the ESP8266 through ThingSpeak, which will send data to it. With the help of the ESP8266, you can get the data from the sensor and transfer it online via the network of your router. These readings will appear in a graph format and can be accessed from anywhere with a web browser. In addition to the BPM, the LCD connected will also display it.
Features of ThingSpeak With ThingSpeak you can aggregate, visualize, and analyze live data streams on a cloud environment. Some of the features that ThingSpeak offers
include
Project build noteConnect ThingSpeak to a variety of IoT devices easily using popular protocols.
Get real-time data from your sensors. On-demand access to aggregated data from third-parties. Analyze IoT data using the powerful MATLAB programming language. Automatically run your IoT analytics in response to schedules and events. IoT prototypes can be built without launching servers or creating web-based applications. You can use Twilio® or Twitter® to communicate using data that is automatically processed.
You built Heart Beat Monitoring over Internet using Arduino and ThingSpeak.
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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