WiFi + Bluetooth module ESP32S serial to WiFi / dual antenna module / ESP32-S module

SKU: FA1053-1
SoC

ESP32-D0WDQ6
Wi-Fi Protocol

802.11 b/g/n (up to 150 Mbps)
Bluetooth

Bluetooth v4.2 BR/EDR and BLE standards
Flash Memory

32Mbit (4MB) Default
Voltage Range

3.0V ~ 3.6V (Typically 3.3V)
Operating Current

Average: 80mA; Peak: 500mA
Antenna Type

PCB Antenna + IPEX (U.FL) Connector
Interface

UART, SPI, SDIO, I2C, PWM, I2S, IR, ADC, DAC
The ESP32-S (ESP32S) is a high-performance, ultra-low-power Wi-Fi + Dual-mode Bluetooth module designed for high-reliability IoT environments. As of 2025, it remains a flagship choice for developers requiring a compact SMD (Surface Mount Device) footprint with advanced RF capabilities, including dual-antenna support (PCB antenna + IPEX connector) for flexible signal management. 
Product Description
The ESP32-S module is the core engine for next-generation smart connectivity. Built around the powerful ESP32-D0WDQ6 dual-core processor, it seamlessly integrates 2.4 GHz Wi-Fi and Bluetooth (v4.2 BR/EDR and BLE). 
This specific “Dual Antenna” variant offers a versatile RF front-end: it features a high-gain onboard PCB antenna for standard indoor use and an IPEX (U.FL) connector for projects requiring external high-gain antennas to penetrate metal enclosures or reach long distances. This makes the ESP32-S the industrial standard for Serial-to-Wi-Fi bridges, low-power sensor hubs, and smart home gateways.
Key Features
  • Dual-Core Processing: Xtensa® 32-bit LX6 dual-core processor with adjustable clock frequency (80MHz to 240MHz).
  • Hybrid Antenna Design: Onboard PCB antenna + IPEX socket for external antenna flexibility.
  • Dual-Mode Bluetooth: Supports both Bluetooth Classic (for legacy device pairing) and Bluetooth Low Energy (BLE) for high-efficiency mobile interfacing.
  • Rich Peripheral Set: Includes capacitive touch sensors, Hall sensors, SD card interface, Ethernet, high-speed SPI, UART, I2S, and I2C.
  • Ultra-Low Power Consumption: Advanced fine-grained clock gating and power management for battery-operated deployments.
  • Industrial Reliability: Designed to operate in harsh temperature ranges from -40°C to +85°C.
Usage Scenarios
  • Business & Manufacturing: Ideal for “Serial-to-Wi-Fi” industrial bridges, converting legacy machinery data to cloud-ready IoT signals.
  • Smart Building: Used in Wi-Fi-enabled smart lighting, HVAC controllers, and security systems requiring stable, long-range connectivity via external antennas.
  • Single User / Maker: The perfect module for DIY smart home hubs (Home Assistant) or portable Wi-Fi audio streamers (I2S).
Q: How do I switch between the PCB antenna and the IPEX connector?

This usually requires moving a small 0-ohm resistor (solder bridge) near the antenna base. By default, most modules are set to the PCB antenna. Check your specific batch configuration or use a soldering iron to bridge the IPEX path for external antenna use

Q: Can I use this for battery-powered projects?

Yes. The ESP32-S features a “Deep Sleep” mode where current consumption drops as low as 10µA, making it suitable for sensors that wake up periodically to transmit data

Q: Is the ESP32-S compatible with the Arduino IDE?

Absolutely. Select the “ESP32 Dev Module” or “Generic ESP32” board in the Arduino IDE. It is also fully compatible with MicroPython, CircuitPython, and Espressif’s own ESP-IDF framework

Q: What is the benefit of Dual-mode Bluetooth?

Unlike many modern chips that only support BLE, the ESP32-S supports Bluetooth Classic. This allows you to connect to older audio devices, printers, or legacy computers that do not support Low Energy standards

Q: Is this module suitable for business procurement/mass production?

Yes. The ESP32-S follows standard industrial certifications (FCC/CE/RoHS) and uses the standard SMD-38 footprint, making it easy to integrate into automated pick-and-place manufacturing lines

Q: What is the maximum data rate for Wi-Fi?

Under the 802.11n protocol at 2.4 GHz, the module supports a maximum physical layer data rate of 150 Mbps

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