ESP32-S3 Ultimate Guide: Uses, vs ESP32, Python Support, and Specs

The ESP32-S3 has quickly become one of the most popular chips for Internet of Things (IoT) developers and electronics hobbyists alike. Created by Espressif Systems, this powerful, low-cost system-on-chip (SoC) delivers a massive performance boost for modern wireless projects.

If you are wondering what the ESP32-S3 is used for, how it compares to the original ESP32, or if it can run Python, this comprehensive guide answers all your questions.

What is the ESP32-S3 Used For?

The ESP32-S3 is specifically designed for Artificial Intelligence of Things (AIoT) applications. Thanks to its hardware acceleration and wireless connectivity, it handles complex edge-computing tasks effortlessly.

Common ESP32-S3 uses include:

• Edge AI and Machine Learning: Local image recognition, offline voice wake-word detection, and acoustic scene classification.
• Smart Home Automation: Building smart thermostats, smart lighting systems, security cameras, and connected home appliances.
• Human-Machine Interfaces (HMI): Driving high-resolution color touchscreens and graphical user interfaces (GUIs).
• Robotics and Advanced IoT: Drone flight controllers, industrial wireless sensors, and telemetry tracking hubs.

Is ESP32-S3 Better Than ESP32?

Yes, the ESP32-S3 is significantly better than the original ESP32 for almost all modern IoT projects. While both chips offer dual-core processors and Wi-Fi, the S3 version introduces critical hardware upgrades:

1. Vector Instructions for Artificial Intelligence

The standout feature of the ESP32-S3 is its inclusion of vector instructions. This provides hardware acceleration for neural network computing and digital signal processing (DSP). As a result, machine learning models run much faster on the S3 than on the standard ESP32.

2. Upgraded Bluetooth 5 (LE) Connectivity

While the original ESP32 relies on older Bluetooth 4.2 technology, the ESP32-S3 supports Bluetooth 5 (LE) and Bluetooth Mesh. This upgrade delivers longer wireless range, faster data throughput, and better power efficiency.

3. More Programmable GPIOs and Native USB

The ESP32-S3 provides up to 45 programmable GPIO pins, compared to only 36 on the standard ESP32. Additionally, it features full native USB OTG support. This eliminates the need for an external USB-to-UART chip, simplifying hardware design.

4. Expanded Memory Support

The S3 chip supports larger octal SPI flash and external PSRAM (Pseudo-static RAM). This extra memory capacity is essential for loading large AI models and smoothly rendering complex display graphics.

Can ESP32-S3 Run Python?

Yes, the ESP32-S3 can run Python. This makes it highly accessible for developers who prefer rapid prototyping over writing complex C++ code. You can program the chip using two main open-source micro-runtimes:

• MicroPython: A lean implementation of Python 3 optimized to run efficiently on bare-metal microcontrollers.
• CircuitPython: Created by Adafruit, this beginner-friendly Python variant offers massive library support for programming sensors, Neopixels, and displays on the ESP32-S3 instantly.

Is ESP32-S3 a Microcontroller or Microprocessor?

The ESP32-S3 is a Microcontroller (MCU), not a microprocessor (MPU).

An MPU—like the processor inside a computer or a Raspberry Pi 4—requires external RAM and boots a heavy operating system like Linux. In contrast, the ESP32-S3 integrates the processor cores, internal memory (ROM/RAM), wireless radios, and hardware peripherals onto a single silicon chip. It executes bare-metal code or a Real-Time Operating System (RTOS) the exact millisecond you turn on the power.

Summary: Should You Choose the ESP32-S3?

If your project involves basic Wi-Fi connectivity and simple sensor reading, the classic ESP32 remains a budget-friendly choice. However, if your project requires machine learning, color displays, Bluetooth 5, or Python programming, upgrading to the ESP32-S3 is highly recommended.