Ai Thinker Technology ESP32S Users Manual

ESP-32S User Manual

REV 1.0

2017.3

ESP-32S User Manual

FCC STATEMENT

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

(1) This device may not cause harmful interference.

(2) This device must accept any interference received, including interference that may cause undesired

operation.

Any changes or modifications not expressly approved by the party responsible for compliance could void the

user’s authority to operate the equipment.

Please notice that if the FCC identification number is not visible when the module is installed inside another

device, then the outside of the device into which the module is installed must also display a label referring to

the enclosed module. This exterior label can use wording such as the following: “Contains FCC ID:

2AHMR-ESP32S” any similar wording that expresses the same meaning may be used.

This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This

equipment should be installed and operated with a minimum distance of 20cmbetween the radiator & your

body. This transmitter must not be co-located or operating in conjunction with any other antenna or

transmitter.

The module is limited to OEM installation ONLY.

The OEM integrator is responsible for ensuring that the end-user has no manual instruction to remove or

install module.

The module is limited to installation in mobile application;

A separate approval is required for all other operating configurations, including portable configurations with

respect to Part 2.1093 and difference antenna configurations.

There is requirement that the grantee provide guidance to the host manufacturer for compliance with Part

15B requirements.

ESP-32S User Manual

Contents

1.Preface

................................................................................................................................................

2. Pin Definitions

....................................................................................................................................

2.1 Pin Layout

.................................................................................................................................

2.2 Pin Description

.........................................................................................................................

2.3 Strapping Pins

...........................................................................................................................

3. Functional Description

.......................................................................................................................

3.1 CPU and Internal Memory

........................................................................................................

3.2 External Flash and SRAM

..........................................................................................................

3.3 Crystal Oscillators

.....................................................................................................................

3.4 Power Consumption

.................................................................................................................

3.5 Peripherals and Sensors

...........................................................................................................

3.5.1 Peripherals and Sensors Description

.............................................................................

3.5.2 Peripheral Schematics

.................................................................................................

4. Electrical Characteristics

..................................................................................................................

4.1 Absolute Maximum Ratings

...................................................................................................

4.2 Recommended Operating Conditions

....................................................................................

4.3 Digital Terminal Characteristics

.............................................................................................

4.4 Wi-Fi Radio

.............................................................................................................................

4.5 Bluetooth LE Radio

.................................................................................................................

4.5.1 Receiver

.......................................................................................................................

4.5.2 Transmit

......................................................................................................................

4.6 Reflow Profile

.........................................................................................................................

5. Schematics

.......................................................................................................................................

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

Categories

Items

Specifications

Hardware

Module interface SD card, UART, SPI, SDIO, I2C, LED PWM, Motor PWM,

I2S, I2C, IR

GPIO, capacitive touch sensor, ADC, DAC, LNA pre-

amplier

On-chip sensor

Hall sensor, temperature sensor

On-board clock

40 MHz crystal

Operating voltage

2.2 〜3.6V

Operating current

Average: 80 mA

Operating temperature range

-40°C ~ 85°C *

Ambient temperature range

Normal temperature

Package size

18 mm x 25.5 mm x 2.8 mm

Software

Wi-Fi mode

Station/SoftAP/SoftAP+Station/P2P

Security

WPA/WPA2/WPA2-Enterprise/WPS

Encryption

AES/RSA/ECC/SHA

Firmware upgrade

UART Download / OTA (via network) / download and

write firmware via host

Software development

Supports Cloud Server Development / SDK for custom

firmware development

Network protocols

IPv4, IPv6, SSL, TCP/UDP/HTTP/FTP/MQTT

User configuration

AT instruction set, cloud server, Android/iOS app

ESP-32S User Manual

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

2. Pin Definitions

2.1 Pin Layout

Figure 1: Top and Side View of ESP-32S

Table 2: ESP-32S Dimensions

Length

Width

Height

PAD size (bottom)

Pin pitch

Shielding can height

PCBthickness

18 mm

25.5 mm

2.8± 0.1 mm

0.85 mm x 0.9 mm

1.27 mm

2 mm

±0.1mm

ESP-32S User Manual

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

2.2 Pin Description

ESP -32S has 39 pins. See pin definitions in Table 3.

Table 3: ESP-32S Pin Definitions

Name

No.

Type

Function

GND

1PGround

3V32P

Power supply.

EN3I

Chip-enable signal. Active high.

SENSOR_VP

4IGPI036, SENS0R_VP, ADC_H, ADC1_CH0, RTC_GPI00

SENSOR_VN

5IGPI039, SENS0R_VN, ADC1_CH3, ADC_H, RTC_GPI03

IO34

6IGPI034, ADC1_CH6, RTC_GPI04

IO35

7IGPI035, ADC1_CH7, RTC_GPI05

IO32

I/O

GPI032, XTAL_32K_P (32.768 kHz crystal oscillator input), ADC1_CH4，

T0UCH9, RTC_GPI09

IO33

I/O

GPI033, XTAL_32K_N (32.768 kHz crystal oscillator output), ADC1_CH5,

T0UCH8, RTC_GPI08

IO25

I/O

GPI025, DAC_1, ADC2_CH8, RTC_GPI06, EMAC_RXD0

IO26

I/O

GPI026, DAC_2, ADC2_CH9, RTC_GPI07, EMAC_RXD1

IO27

I/O

GPI027, ADC2_CH7, T0UCH7, RTC_GPI017, EMAC_RX_DV

IO14

I/O

GPraM，ADC2_CH6, T0UCH6,MTMS, HSPHK， HS2_CLK, SD_CLK,

EMAC_TXD2

IO12

I/O

GPI012, ADC2_CH5, T0UCH5, RTC_GPI015, MTDL HSPIQ, HS2_DATA2,

SD_DATA2, EMAC_TXD3

GND

15PGround

IO13

I/O

GPI013, ADC2_CH4, T0UCH4, RTC_GPI014, MTCK, HSPID, HS2_DATA3,

SD_DATA3, EMAC_RX_ER

SHD/SD2*

I/O

GPIO9, SD_DATA2, SPIHD, HS1_DATA2, U1RXD

SWP/SD3*

I/O

GPIO10, SD_DATA3, SPIWP, HS1_DATA3, U1TXD

SCS/CMD*

I/O

GPIO11, SD_CMD, SPICSO, HS1_CMD, U1RTS

SCK/CLK*

I/O

GPIO6, SD_CLK, SPICLK, HS1_CLK, U1CTS

SDO/SD0*

I/O

GPIO7, SD_DATA0, SPIQ, HS1_DATA0, U2RTS

SDI/SD1*

I/O

GPIO8, SD_DATA1, SPID, HS1_DATA1, U2CTS

IO 15

I/O

GPIO15, ADC2_CH3, T0UCH3, MTD0, HSPICSO, RTC_GPI013, HS2_CMD,

SD_CMD, EMAC_RXD3

IO 224I/O

GPIO2, ADC2_CH2, T0UCH2,HSPIWP, HS2_DATA0, SD_DATA0

IO 025I/O

GPIO0, ADC2_CH1, T0UCH1, CLK_0UT1, EMAC_TX_CLK

IO 426I/O

GPIO4,ADC2_CH0,T0UCH0, RTC_GPI010, HSPIHD, HS2_DATA1,

SD_DATA1, EMAC_TX_ER

IO 16

I/O

GPIO16, HS1_DATA4, U2RXD, EMAC_CLK_0UT

IO 17

I/O

GPIO17, HS1_DATA5, U2TXD, EMAC_CLK_0UT_180

IO 529I/O

GPIO5, VSPICSO, HS1_DATA6, EMAC_RX_CLK

IO18

I/O

GPIO18, VSPHK，HS1_DATA7

IO19

I/O

GPIO19, VSPIQ, UOCTS, EMAC—TXDO

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Ai Thinker Technology ESP32S Users Manual

Specifications and Main Features

Frequently Asked Questions

User Manual