Bitcoin $ Price Tracker Using ESP32 & OLED Display
491.Bitcoin $ Price Tracker Using ESP32 & OLED Display In this project, we'll use an ESP32 WiFi module and an OLED display to create a Bitcoin price tracker. The device is programmable, a…
Know the mission before touching a wire.
Understand what you are making, prepare the right tools, and make the workbench safe.
Project details
Bitcoin $ Price Tracker Using ESP32 & OLED Display is a iot project. 491.Bitcoin $ Price Tracker Using ESP32 & OLED Display In this project, we'll use an ESP32 WiFi module and an OLED display to create a Bitcoin price tracker. The device is programmable, a…
- Source pages
- 1393-1397
- 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.
- 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
ESP32- ESP32 WROOM WiFi Module
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- ESP32 WROOM WiFi Module; 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
PART LEARNING VIEWLED 5mm LED Red & Green Color
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 LED 5mm LED Red & Green Color; 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
PASSIVE LEARNING VIEWResistor 560 ohm
A passive component sets current, voltage, timing, filtering, or signal behaviour without adding gain.
What it does hereIts exact value and tolerance determine how the surrounding stage behaves.
Buy / compare this part ↗Advantages
- Simple and dependable
- Low cost
- Easy to measure before installation
Limitations
- A wrong value can stop or damage the circuit
- Ratings must not be exceeded
- Polarized parts require correct orientation
Handling
- Measure unclear values
- Observe capacitor polarity
- Avoid overheating leads while soldering
Specifications to verify
- Use the exact model, value, package, and rating listed for Resistor 560 ohm; similar-looking parts are not always interchangeable.
- Confirm value, tolerance, power or voltage rating, polarity, and package size.
What's this?Image, role, pros, cons, handling & specifications
OLED Module - 0.96" SSD1306 OLED Display
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 OLED Module - 0.96" SSD1306 OLED Display; 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
Hardware Setup & Circuit
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 Hardware Setup & Circuit; 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.
Bitcoin $ Price Tracker Using ESP32 & OLED Display: 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 note491.Bitcoin $ Price Tracker Using ESP32 & OLED Display In this project, we'll use an ESP32 WiFi module and an OLED display to create a Bitcoin price tracker. The device is programmable, and it has the capability of displaying the current price of Bitcoin in US dollars. The most advantageous feature of this approach is that the gadget may be configured to show the value of any cryptocurrency in any fiat currency. This is only
doable if one of the exchanges provides access to an application programming interface (API). The Bitcoin Price Tracker was created with the help of the ESP32 development board, which already incorporates WiFi connectivity. It then establishes a connection to your WiFi network and, once every 15 minutes, retrieves the most recent Bitcoin price using the Coindesk API. In addition to displaying the current price of Bitcoin, the device also shows the percentage change in price from yesterday's market close. In addition to that, a red or green LED glows, depending on whether or not the price has gone up or down since it was last checked.
Component Required
Project build noteESP32- ESP32 WROOM WiFi Module LED 5mm LED Red & Green Color Resistor 560 ohm OLED Module - 0.96" SSD1306 OLED Display Jumper Wires
Breadboard Hardware Setup & Circuit The circuit for the Bitcoin Price Tracker is not a complicated one at all. For the creation of the schematic, I utilized the fritzing software.
Circuit Diagram
Project build noteEstablish a connection between the SDA and SCL pins of the OLED display and the D21 and D22 pins of the ESP32 module. Connect the red and green LEDs to terminals D18 and D19, respectively, using a resistor of 200 ohms. The 3.3V and GND pins on the ESP32 are used to supply power to the OLED Display. In this case, a red LED shows that the price of Bitcoin is decreasing, while a green LED indicates that the price of Bitcoin is increasing.
In order to put together the circuit in accordance with the circuit schematic, I utilized a breadboard. For this project, you have the option of building your own personal circuit board (PCB). Testing the Bitcoin $ Price Tracker After the code has been uploaded, the ESP32 Module will make an attempt to connect to the WiFi Network by using the credentials for the Network that were provided in the code. After it has successfully connected, it will work to retrieve the data by utilizing the API that has been provided and will show the parameters on the Serial Monitor.
On the other side, the Bitcoin logo will appear on the OLED display when it first starts up. As soon as the device establishes a connection to the WiFi Network, it will begin displaying the current price of Bitcoin as well as the change in value of Bitcoin since the previous date. If there is a falling trend in the price of bitcoin, the red LED will light up. In the event that the value of Bitcoin continues to rise, a green LED will light up and become active.
You built Bitcoin $ Price Tracker Using ESP32 & OLED Display.
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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