ESP32 SMD WiFi Bluetooth Module ESP32S ESP32E 4MB Flash PCB Antenna

🔧 ESP32 SMD Wireless Module (ESP-32 / ESP32E / ESP32S) | AuscomTech

Surface-mount WiFi and Bluetooth modules designed for direct integration into custom PCBs and embedded systems.

These modules use a dual-core 32-bit processor with built-in wireless connectivity, making them ideal for IoT, automation, and smart electronics.

Supplied as bare SMD modules with no headers, they are intended for soldering onto PCBs in compact or production-ready designs.

⭐ Key Features

• SMD Surface-Mount Design – Direct PCB soldering for embedded and production use
• Dual-Core Performance – Up to 240 MHz processing capability
• WiFi + Bluetooth – 802.11 b/g/n with Bluetooth 4.2 BLE
• 4MB Flash – Supports firmware storage and OTA updates
• Integrated PCB Antenna – Compact onboard antenna design
• Rich Peripheral Support – UART, SPI, I2C, PWM, ADC, DAC, SDIO
• Low Power Operation – Suitable for IoT and battery-powered devices

📊 Technical Specifications

• Processor: Xtensa dual-core 32-bit LX6
• Clock Speed: 80 MHz to 240 MHz
• Flash Memory: 4MB
• Wireless: WiFi 802.11 b/g/n + Bluetooth 4.2 BLE
• GPIO: Up to 22 available
• Operating Voltage: 2.7V – 3.6V (3.3V typical)
• Interfaces: UART, SPI, I2C, PWM, ADC, DAC, SDIO
• Package Type: SMD (38-pin castellated module)
• Antenna: Onboard PCB antenna
• Frequency: 2.4 GHz
• Dimensions: approx. 25.5 × 18 × 3 mm

🔀 Module Variants Explained

• ESP-32 (Original) – Standard version with integrated PCB antenna and 4MB flash. Suitable for most general-purpose applications.
• ESP32E – Improved revision with better RF performance and stability. Commonly used in newer designs requiring more reliable wireless communication.
• ESP32S – Variant with PCB antenna and optional external antenna support via IPEX pad (requires resistor modification). Ideal for applications needing flexible antenna options.

🧩 Typical Applications

• Custom IoT product development
• Embedded wireless control systems
• Smart home and automation devices
• Wireless sensor networks
• Compact PCB-based electronics
• Industrial and consumer electronics

⚠️ Important Notes

• Available variants: ESP-32, ESP32E, ESP32S (select before purchase)
• This is a bare module – no headers or USB interface included
• Requires external USB-to-TTL programmer for firmware upload
• 3.3V logic only – not 5V tolerant
• Designed for soldering onto PCBs, not breadboard use
• Antenna performance depends on PCB layout and clearance

📦 Package Includes

• 1 × ESP32 Module (selected variant)

🔗 Recommended Accessories (Not Included)

• USB to TTL Serial Adapter – required for programming
• 3.3V Regulator Module – stable power supply
• Prototype PCB or Custom PCB – for integration
• ESP32 Programming Board – simplifies flashing and testing