The ESP32 is a WiFi + Bluetooth powerhouse, combining dual-core processing, rich peripherals, and ultra-low power modes making it ideal for next-gen IoT, wearables, and edge computing.
Core Specifications
Microcontroller: Dual-Core Xtensa LX6 (32-bit)
Operating Voltage: 3.3V (5V tolerant I/O with caution)
Clock Speed: 80MHz (up to 240MHz configurable)
Flash Memory: 4MB / 8MB / 16MB (varies by model)
SRAM: 520KB (total)
Wireless: WiFi 4 (802.11 b/g/n) + Bluetooth 4.2/5.0 (BLE)
I/O & Connectivity
Digital I/O Pins: 34 (GPIOs, some restricted)
Analog Inputs: 18x 12-bit ADC (0-3.3V range)
Analog Outputs: 2x 8-bit DAC (unique feature)
Communication:
3x UART (vs. ESP8266’s 1)
I2C, SPI, I2S, CAN (software-configurable)
PWM: 16 channels (software-driven)
Power & USB
Input Voltage: 5V via Micro-USB or VIN (5V-12V)
Operating Current: ~80mA (WiFi active)
Deep Sleep Current: ~5μA (ultra-low power)
Onboard Regulator: 3.3V/600mA
Advanced Features
Touch Sensor Pins: 10x capacitive touch GPIOs
Hall Effect Sensor: Built-in magnetic field detection
Secure Boot & Flash Encryption: Enhanced security
Physical Dimensions
Size: ~52mm × 28mm (varies by variant)
Headers: Male pins (breadboard-friendly)
Key Advantages
✔ Dual-Core CPU: Run tasks in parallel (e.g., WiFi + BLE simultaneously)
✔ Bluetooth 5.0: Classic + BLE support (unlike ESP8266)
✔ 12-bit ADC & 8-bit DAC: Precision analog I/O
✔ Secure IoT: AES/SHA encryption, OTA updates
Performance & Memory
240MHz Max Clock (3x faster than ESP8266)
520KB SRAM (handles complex RTOS tasks)
16MB Flash (highest variant) for large firmware
Connectivity & Expansion
18 Analog Inputs: For high-resolution sensor networks
Hardware CAN Bus: Automotive/industrial applications
I2S Audio: Supports digital microphones/speakers
Power Efficiency
Deep Sleep (5μA): Years of battery life for sensors
WiFi/BLE Sleep Modes: Adaptive power saving
Applications
Smart Home Hubs (WiFi + BLE gateways)
Wearables (low power + compact size)
Industrial IoT (CAN bus, RS485 via UART)
Voice Assistants (I2S + touch controls)
Why Choose ESP32?
Future-Proof IoT: Dual-core + BLE 5.0
Sensor Richness: 12-bit ADC, touch pins, hall sensor
Cost-Performance: Outperforms Arduino at lower cost
Pro Tip: Use FreeRTOS to leverage dual-core multitasking!
Package Includes: 1 x ESP32