Over the past decade, ESP32 has evolved from a low-cost Wi-Fi chip into an IoT and embedded development platform familiar to developers worldwide. It is widely used in smart home devices, industrial IoT, smart sensors, wearable devices, audio products, robotics, smart displays, and various connected terminals.
The success of ESP32 is not simply because of its high performance, nor is it just because of its low price.
More importantly, it addresses several long-standing challenges faced by embedded developers at the same time: low-cost hardware, built-in wireless connectivity, the Arduino development environment, a rich software ecosystem, mature development boards and modules, and a complete path from prototyping to mass production.
Arduino played a very important role in the formation of this ecosystem.
Arduino lowered the learning barrier for embedded development and helped a large number of developers become accustomed to a simple, open, and easy-to-use development approach. ESP8266 and later ESP32 leveraged this development entry point to bring Wi-Fi, Bluetooth, rich peripherals, and low-cost hardware to a much broader developer community.
Therefore, a more accurate way to describe their relationship is not that “ESP32 replaced Arduino,” but rather:
Arduino cultivated a large community of embedded developers, while ESP32 brought this development approach into wireless connectivity and IoT product development.
According to Espressif’s 2025 annual report, its IoT chips have achieved cumulative global shipments of more than 1.5 billion units, with more than 3 million active ecosystem developers and over 10,000 customers worldwide.
Why Is ESP32 So Popular?
When the success of ESP32 is broken down, it becomes clear that it does not rely on a single piece of “absolutely leading” technology. Instead, it combines multiple factors that developers genuinely care about.
1. Built-in Wi-Fi and Bluetooth Make ESP32 Naturally Suited for IoT
When developing connected products with traditional MCUs, developers typically need to add separate Wi-Fi, Bluetooth, or other wireless communication chips.
ESP32, however, has made wireless connectivity an important part of the platform from the very beginning.
This allows developers to directly build products around Wi-Fi, Bluetooth, BLE, and other wireless capabilities, including:
- Smart home devices
- Wi-Fi sensors
- Bluetooth devices
- Smart controllers
- Remote monitoring terminals
- IoT gateways
- Audio devices
- Smart display devices
For products that require network connectivity, reducing the number of peripheral chips can not only lower BOM costs, but also reduce the complexity of PCB design, driver development, communication debugging, and supply chain management.
As the ESP32 product family continues to expand, developers can also choose different models according to the requirements of their projects, including the ESP32-C series, ESP32-S series, ESP32-H series, and newer models designed for higher-performance applications.
2. Arduino IDE Lowers the Development Barrier for ESP32
One of the key factors behind the rapid expansion of the ESP32 developer community is the Arduino ecosystem.
For traditional embedded developers, MCU development often involves multiple components and processes, including compilers, SDKs, linker scripts, startup code, programming tools, and device drivers.
The value of Arduino lies in the fact that it highly abstracts and simplifies many of these complex tasks.
Developers can use the familiar Arduino IDE to:
- Install the board support package;
- Select an ESP32 development board;
- Open an example program;
- Modify the code;
- Compile and upload the firmware.
For students, makers, hardware entrepreneurs, and even Web developers who are new to embedded development, this approach significantly lowers the barrier to entry.
More importantly, Arduino did not limit developers to AVR chips.
As the Arduino ecosystem gradually expanded its support for an increasing number of third-party hardware platforms, ESP8266 and ESP32 were able to take advantage of this opportunity.
ESP32 vs Arduino: What Is the Difference?
Many beginners assume that ESP32 and Arduino are essentially the same thing.
In reality, they operate at different levels.
Arduino can refer to a development platform, software ecosystem, development board brand, and a development approach designed for beginners, while ESP32 primarily refers to a series of MCU/SoC products developed by Espressif and their associated ecosystem.
Therefore, “ESP32 vs Arduino” is not simply a chip-versus-chip competition.
| Comparison | ESP32 | Classic Arduino Uno |
|---|---|---|
| Wi-Fi | Built-in | Not built-in |
| Bluetooth | Supported on many models | Not built-in |
| Processing Power | Higher, depending on the model | Relatively lower |
| Wireless IoT | Highly suitable | Usually requires additional modules |
| Development Environment | Arduino IDE, ESP-IDF, etc. | Arduino IDE, etc. |
| Peripherals | Rich | Suitable for basic control |
| Ecosystem | ESP32 + Arduino + ESP-IDF | Arduino ecosystem |
| Typical Applications | IoT, smart hardware, wireless devices | Education, maker projects, basic control |
| Product Development | Can further use modules and native SDKs | Depends on the specific platform |
Therefore, ESP32 did not really “eliminate” Arduino.
Instead, many developers still use the Arduino IDE while choosing ESP32 as the underlying hardware platform.
This is also one of the key reasons why ESP32 was able to quickly enter the developer market.
How Did Arduino Help ESP32 Become Mainstream?
The development of ESP32 cannot be separated from ESP8266.
In its early days, ESP8266 was mainly used as a low-cost Wi-Fi module. Developers often connected it to an Arduino Uno and implemented network connectivity through serial communication and AT commands.
However, the community quickly realized:
Since ESP8266 already had its own processing capabilities, why was another MCU needed to run the main application?
The community then began experimenting with running Arduino-style programs directly on ESP8266.
This change was extremely important.
It meant that developers no longer had to treat ESP8266 merely as a “wireless network adapter,” but could instead use it directly as the main controller of a project.
At the same time, Arduino’s third-party board support mechanism further lowered the barrier for new chips to enter the Arduino ecosystem.
According to Arduino’s 2025 Open Source Report, released in 2026, the Arduino Library Manager added 1,218 new libraries in 2025, bringing the total to 8,754. Arduino Project Hub also currently has more than 6,000 projects.
The significance of this open ecosystem is that:
Developers are not just accumulating experience with a particular development board; they are building a complete development methodology that can be transferred across platforms.
Why Is Arduino Compatibility So Important for ESP32?
Simply put:
Arduino makes it easier for developers to get started, while ESP-IDF allows projects to go deeper.
ESP32 Arduino Core is built on Espressif’s native software ecosystem. This allows developers to start with simple Arduino APIs and gradually move toward more advanced, lower-level, and professional features.
For example:
- GPIO
- I2C
- SPI
- PWM
- Wi-Fi
- Bluetooth
- BLE
- OTA
- File systems
- Network protocols
- Low-power features
- Security features
For a simple prototype, the Arduino API is often sufficient.
When a project enters the formal product development stage, however, development teams can further adopt ESP-IDF, FreeRTOS, and other lower-level capabilities.
This “progressive development” approach is extremely important.
If developers had to learn a complete professional toolchain before starting a project, many maker projects might never get off the ground.
On the other hand, if a development platform were only suitable for quickly building demos but lacked the capabilities needed for product development, companies would have to switch platforms again when entering mass production.
ESP32 addresses this gap between the two stages.
ESP32 Developer Ecosystem: The Real Competitive Advantage Is More Than the Chip
If you only look at chip specifications, ESP32 is not necessarily ahead in every category.
What has enabled ESP32 to remain competitive over the long term is the complete developer ecosystem that has formed around it.
ESP32 Arduino Core
It allows developers who are already familiar with Arduino to quickly get started with ESP32 development.
ESP-IDF
It provides professional developers with a more complete native development framework.
A Wide Range of Development Boards
From basic DevKit boards to third-party development boards equipped with displays, cameras, sensors, audio interfaces, and other peripherals, developers can directly select hardware that closely resembles the target product form factor.
ESP32 Modules
After completing a prototype, developers can further adopt ESP32 modules that integrate RF, antennas, and related designs, helping accelerate product development.
A Large Number of Open-Source Projects
Thousands of GitHub projects, tutorials, forum discussions, and third-party libraries reduce the cost and time required for troubleshooting.
Continuously Updated Software Tools
ESP-IDF, Arduino Core, flashing tools, debugging tools, and various components are continuously updated, allowing the entire ecosystem to keep expanding.
This is also an important difference between ESP32 and some chip platforms that offer only “Arduino Core compatibility.”
The real challenge is not simply getting an Arduino program to run. The real challenge is maintaining Arduino, the SDK, development boards, modules, documentation, toolchains, and mass-production support over the long term.
Why Is ESP32 Particularly Suitable for IoT Development?
One of the biggest advantages of ESP32 is that it is highly suitable for products that combine connectivity, control, and sensing.
Smart Home
ESP32 can be used for:
- Smart lights
- Smart switches
- Smart plugs
- Smart locks
- Temperature and humidity sensors
- Home gateways
- Smart panels
Capabilities such as Wi-Fi, Bluetooth, and OTA can be directly integrated into the product development process.
Industrial IoT
ESP32 can be used for:
- Data acquisition terminals
- Wireless sensors
- Remote monitoring devices
- Industrial gateways
- Equipment condition monitoring
- Environmental monitoring devices
For cost-sensitive devices that require connectivity but do not need the high-performance Linux processing capabilities of more powerful processors, ESP32 is an attractive solution.
Smart Displays
As ESP32 products continue to improve in performance, their applications have expanded from simple sensors to:
- Smart control panels
- Small-size HMIs
- Appliance displays
- Touch-enabled devices
- Handheld terminals
- Information display terminals
Audio Devices
The Bluetooth and I2S capabilities of ESP32 make it suitable for:
- Bluetooth audio devices
- Smart speakers
- Voice-controlled terminals
- Audio controllers
- Multi-device audio applications
Camera and Vision Applications
ESP32 is also widely used in low-cost vision and sensing projects, such as:
- Camera devices
- Video doorbells
- Barcode and QR code scanning devices
- Basic machine vision
- Remote image acquisition
Of course, this does not mean that ESP32 can replace all high-performance vision SoCs.
For complex video processing, high-resolution vision, and high-performance AI inference, more powerful processors or dedicated SoCs are generally still required.
Why Is ESP32 Easy to Move from Prototype to Mass Production?
This is one of the more important advantages of ESP32 compared with many maker platforms.
Many development boards allow developers to complete a demo within a few hours, but once a project enters product development, a series of new challenges can suddenly emerge:
- How should the PCB be designed?
- How should RF be handled?
- How should the antenna be designed?
- How should the power supply be designed?
- How should EMC/EMI be controlled?
- How should OTA be implemented?
- How should firmware be programmed during production?
- How should production testing be performed?
- How can long-term component availability be ensured?
- How can a development board be transitioned to a production-ready module?
The ESP32 ecosystem provides a relatively continuous development path:
ESP32 Development Board → Product Prototype → ESP32 Module → Custom PCB → PCBA → Testing → Certification → Mass Production
This is also why ESP32 is more than just a “maker chip.”
For businesses, what matters even more is:
A prototype developed by an engineering team using ESP32 today can potentially continue to use the same platform when moving into a commercial product.
This continuity can reduce the costs associated with selecting a new platform, redeveloping drivers, and revalidating hardware.
ESP32 Is Not the Best Choice for Every Application
ESP32 is powerful, but that does not mean it is suitable for every project.
For example:
Ultra-Low-Power Bluetooth Products
Some dedicated low-power wireless MCUs may be more suitable for certain applications.
Complex Industrial Control
For projects requiring strict real-time performance, extensive industrial interfaces, or specific functional safety requirements, MCUs such as STM32 may be a better choice.
High-Performance Linux Applications
If a product requires Linux, a complex GUI, high-performance video processing, or large AI models, a Linux SoC is generally a more appropriate option.
High-End Machine Vision
For high-resolution video, complex vision algorithms, and high-performance edge AI, ESP32 is not the ideal choice.
Therefore, the advantage of ESP32 is not that it ranks first in every performance category.
Its real advantage is:
Low cost + wireless connectivity + easy development + a mature ecosystem + diverse product forms + mass-production capability.
When a platform is “good enough” across multiple critical dimensions, it can easily become the default choice for developers.
The Next Step for ESP32: From IoT Connectivity to AIoT and Smart Interaction
The ESP32 product family is moving toward higher performance, richer connectivity, and more complex interactive applications.
One of the new members worth paying attention to is the ESP32-S31.
Espressif released the ESP32-S31 in March 2026, positioning it for next-generation AIoT applications. The chip adopts a dual-core RISC-V architecture and integrates multiple connectivity technologies, including Wi-Fi 6, Bluetooth 5.4, IEEE 802.15.4, and Ethernet. It is designed for applications such as edge AI, human-machine interaction, consumer devices, and industrial equipment.
More notably, the ESP32-S31 entered mass production and was officially launched in July 2026. Its official positioning covers applications including smart home hubs, smart speakers, edge AI devices, and industrial automation.
This indicates that the direction of ESP32 development is changing.
Early ESP8266 mainly addressed:
How can devices be connected to the Internet at a low cost?
Early ESP32 went a step further:
How can wireless connectivity, control, and more peripherals be integrated into a single chip?
New-generation products are now exploring another question:
How can developers use fewer chips to achieve connectivity, interaction, sensing, and edge intelligence?
This is also an important direction to watch for the future of ESP32.
Why Can ESP32 Maintain Its Developer Ecosystem Advantage?
Looking back, the success of ESP32 can essentially be attributed to seven factors.
1. Low Cost
Low cost lowers the barrier for developers to try the platform for the first time.
2. Built-in Wireless Connectivity
Wi-Fi and Bluetooth make ESP32 naturally suitable for IoT applications.
3. Arduino Support
Developers familiar with Arduino do not need to learn an entirely new development approach from scratch.
4. ESP-IDF
Once a project matures, developers can move further into professional development.
5. A Rich Software Ecosystem
A large number of libraries, examples, tutorials, and open-source projects reduce development costs.
6. Development Boards and Modules
Developers can quickly move from a demo to a product prototype and then to customized hardware.
7. Long-Term Platform Continuity
ESP32 is not just a single chip model, but an entire product family that continues to expand.
Together, these seven factors create a positive feedback loop:
More developers → More projects → More tutorials and code → Lower development costs → More product adoption → A larger ecosystem → More developers
Once a hardware platform enters this cycle, it becomes difficult for newcomers to replace it simply by offering higher chip specifications.
What ESP32 Really Defeated Was Not Arduino
If we have to answer the question:
“If Arduino cultivated so many developers, why did so many connected projects eventually choose ESP32?”
The answer is not that ESP32 defeated Arduino.
More accurately:
Arduino cultivated developers’ development habits, while ESP32 combined those habits with wireless connectivity, low-cost SoCs, a wide range of modules, and mass-production capabilities.
Arduino solved the problem of:
Making it possible for more people to develop electronic products.
ESP32 took this a step further by solving the problem of:
Making it easier for these developers to build connected electronic products and continue developing their prototypes into real-world products.
This is where the true value of the ESP32 ecosystem lies.
From a Wi-Fi chip costing around $5 to more than 1.5 billion cumulative IoT chip shipments and over 3 million active ecosystem developers today, the success of ESP32 is not simply the result of competing on hardware specifications. Instead, it comes from the platform effect created jointly by hardware, software, development tools, the developer community, modules, and mass-production capabilities.
Conclusion
For future ESP32 products, what determines whether the platform can continue to grow will not simply be CPU clock speed or any single specification.
How easy it is for developers to get started, whether commonly used libraries are comprehensive, whether development boards are diverse, whether AI/IoT examples are mature, whether modules can be easily integrated into commercial products, and whether the transition from prototyping to mass production is smooth are equally important.
This may be the core reason why ESP32 has been able to remain competitive over the long term: it is not simply selling a chip, but an entire development ecosystem that helps developers turn ideas into products.
