User's Manual

ESP-32S User Manual

Shenzhen Ai-Thinker Technology Co., Ltd http://www.ai-thinker.com

1.Preface

ESP-32S is a powerful, generic Wi-Fi +BT+BLE MCU module that targets a wide variety of applications,

ranging from low-power sensor networks to the most demanding tasks, such as voice encoding, music

streaming and MP3 decoding.

At the core of this module is the ESP32-D0WDQ6 chip*, which is designed to be scalable and adaptive. There

are two CPU cores that can be individually controlled or powered, and the clock frequency is adjustable from

80 MHz to 240 MHz . The user may also power off the CPU and make use of the low-power coprocessor to

constantly monitor the peripherals for changes or crossing of thresholds. ESP32 integrates a rich set of

peripherals, ranging from capacitive touch sensors, Hall sensors, low-noise sense amplifiers, SD card

interface, Ethernet, high speed SDIO/SPI, UART, I2S and I2C.

The integration of Bluetooth, Bluetooth LE and Wi-Fi ensures that a wide range of applications can be

targeted, and that the module is future proof: using Wi-Fi allows a large physical range and direct connection

to the internet through a Wi-Fi router, while using Bluetooth allows the user to conveniently connect to the

phone or broadcast low energy beacons for its detection. The sleep current of the ESP32 chip is less than 5

µA, making it suitable for battery powered and wearable electronics applications. ESP-32S supports data

rates of up to 150 Mbps, and 22 dBm output power at the PA to ensure the widest physical range. As such

the chip does offer industry-leading specifications and the best performance for electronic integration, range,

power consumption, and connectivity.

The operating system chosen for ESP32 is free RTOS with LWIP; TLS 1.2 with hardware acceleration is built in

as well. Secure (encrypted) over the air (OTA) upgrade is also supported, so that developers can continually

upgrade their products even after their release.

Table 1 provides the specifications of ESP-32S.

Table 1: ESP-32S Specifications