Espressif ESP01 Bedienungsanleitung

Espressif provides email notifications to keep customers updated on changes to technical documentation.

Please subscribe here.

Download certificates for Espressif products from here.

Information in this document, including URL references, is subject to change without notice. THIS DOCUMENT IS

PROVIDED AS IS WITH NO WARRANTIES WHATSOEVER, INCLUDING ANY WARRANTY OF MERCHANTABIL-

ITY, NON-

INFRINGEMENT, FITNESS FOR ANY PARTICULAR PURPOSE, OR ANY WARRANTY OTHERWISE

ARISING OUT OF ANY PROPOSAL, SPECIFICATION ORSAMPLE.

All liability, including liability for infringement of any proprietary rights, relating to use of information in this docu-

ment is disclaimed. No licenses express or implied, by estoppel or otherwise, to any intellectual property

rights

are granted herein. The Wi-Fi Alliance Member logo is a trademark of the Wi-Fi Alliance.

Alltrade names,trademarks and registeredtrademarksmentionedinthis document arepropertyoftheir

respective

owners, and are hereby acknowledged.

About This Guide

This document provides the specifications for the ESP01 module.

The document structure is as follows:

Chapter

Title

Subject

Chapter 1

Preface

An overview of ESP01

Chapter 2

Pin Definitions

Device pinout and pin descriptions

Chapter 3

Functional Description

Description of major functional modules

Chapter 4

Peripherals and Sensors

Description of peripherals

Chapter 5

Electrical Characteristics

Electrical characteristics and specifications of ESP01

Release Notes

Date

Version

Release notes

2017.10

V1.0

First release.

Documentation Change Notification

Certification

Disclaimer and Copyright Notice

1. O VERVIEW

Note:

* For details on the part number of the ESP32 series, please refer to the document ESP32 Datasheet.

Overview

ESP01 is a powerful, generic Wi-Fi 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. ESP01 integrates a U.FL connector.

At the core of this module is the ESP32-D0WD chip*. The chip embedded is designed to be scalable and adaptive.

There are two CPU cores that can be individually controlled, 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 co-processor 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

SPI, UART, I2S and I2C.

The sleep current of the ESP32 chip is less than 5 µA, making it suitable for battery powered and wearable

electronics applications. 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 freeRTOS 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 theirrelease.

Table 2 provides the specifications of ESP01

Table 2: ESP01 Specifications

Categories

Items

Specifications

Hardware

Module interface

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

PWM, I2S, IR

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

amplifier

On-chip sensor

Hall sensor, temperature sensor

On-board clock

40 MHz crystal

Operating voltage/Power supply

2.7

3.6V

Operating current

Average: 80 mA

Minimum current delivered by

power supply

500 mA

Operating temperature range -40°C ~ +85°C

Ambient temperature range Normal temperature

Package size

18±0.2 mm x 19.2±0.2 mm x 3.2±0.15 mm

Software

Wi-Fi mode

Station/SoftAP/SoftAP+Station/P2P

Wi-Fi Security WPA/WPA2/WPA2-Enterprise/WPS

Encryption

AES/RSA/ECC/SHA

Firmware upgrade

UART Download / OTA (download and write firmware

via network or host)

Software development

Supports Cloud Server Development / SDK for cus-

tom firmware development

Network protocols

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

User configuration

AT instruction set, cloud server, Android/iOS app

2 . PIN DEFINITIO NS

IO35 NC

39: GND

IO32

IO19

IO33

IO18

IO25 IO5

IO26

IO17

IO27 IO16

IO14 IO4

IO12 IO0

GND

IO23

IO22

TXD0

RXD0

IO21

GND

3V3

SENSOR_VP

SENSOR_VN

IO34

Keepout Zone

GND

IO13

SD2

SD3

CMD

CLK

SD0

SD1

IO15

IO2

Pin Definitions

2.1

Pin Layout

1 38

2 37

3 36

4 35

5 34

6 33

7 32

8 31

9 30

10 29

11 28

12 27

13 26

14 25

Figure 1: ESP01 Pin layout

2.2

Pin Description

ESP01 has 38 pins. See pin definitions in Table 3.

Table 3: Pin Definitions

Name

No.

Type

Function

GND

Ground

3V3

Power supply.

Chip-enable signal. Active high.

SENSOR_VP

GPIO36, SENSOR_VP, ADC_H, ADC1_CH0, RTC_GPIO0

SENSOR_VN

GPIO39, SENSOR_VN, ADC1_CH3, ADC_H, RTC_GPIO3

IO34 6

GPIO34, ADC1_CH6, RTC_GPIO4

IO35

GPIO35, ADC1_CH7, RTC_GPIO5

IO32 8 I/O

GPIO32, XTAL_32K_P (32.768 kHz crystal oscillator input), ADC1_CH4,

TOUCH9, RTC_GPIO9

2 . PIN DEFINITIO NS

Note:

* Pins SCK/CLK, SDO/SD0, SDI/SD1, SHD/SD2, SWP/SD3 and SCS/CMD, namely, GPIO6 to GPIO11 are connected

to the integrated SPI flash integrated on ESP01 and are not recommended for other uses.

Name No. Type Function

IO33 9 I/O GPIO33, XTAL_32K_N (32.768 kHz crystal oscillator output), ADC1_CH5,

TOUCH8, RTC_GPIO8

IO25

I/O

GPIO25, DAC_1, ADC2_CH8, RTC_GPIO6, EMAC_RXD0

IO26

I/O

GPIO26, DAC_2, ADC2_CH9, RTC_GPIO7, EMAC_RXD1

IO27

I/O

GPIO27, ADC2_CH7, TOUCH7, RTC_GPIO17, EMAC_RX_DV

IO14 13 I/O

GPIO14, ADC2_CH6, TOUCH6, RTC_GPIO16, MTMS, HSPICLK,

HS2_CLK, SD_CLK, EMAC_TXD2

IO12 14 I/O

GPIO12, ADC2_CH5, TOUCH5, RTC_GPIO15, MTDI, HSPIQ,

HS2_DATA2, SD_DATA2, EMAC_TXD3

GND

Ground

IO13 16 I/O GPIO13, ADC2_CH4, TOUCH4, RTC_GPIO14, 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, SPICS0, HS1_CMD, U1RTS

SCK/CLK*

20 I/O

GPIO6, SD_CLK, SPICLK, HS1_CLK, U1CTS

SDO/SD0* 21 I/O GPIO7, SD_DATA0, SPIQ, HS1_DATA0, U2RTS

SDI/SD1* 22 I/O GPIO8, SD_DATA1, SPID, HS1_DATA1, U2CTS

IO15 23 I/O GPIO15, ADC2_CH3, TOUCH3, MTDO, HSPICS0, RTC_GPIO13,

HS2_CMD, SD_CMD, EMAC_RXD3

IO2 24 I/O

GPIO2, ADC2_CH2, TOUCH2, RTC_GPIO12, HSPIWP, HS2_DATA0,

SD_DATA0

IO0 25 I/O GPIO0, ADC2_CH1, TOUCH1, RTC_GPIO11, CLK_OUT1,

EMAC_TX_CLK

IO4 26 I/O

GPIO4, ADC2_CH0, TOUCH0, RTC_GPIO10, HSPIHD, HS2_DATA1,

SD_DATA1, EMAC_TX_ER

IO16

I/O

GPIO16, HS1_DATA4, U2RXD, EMAC_CLK_OUT

IO17

I/O

GPIO17, HS1_DATA5, U2TXD, EMAC_CLK_OUT_180

IO5

I/O

GPIO5, VSPICS0, HS1_DATA6, EMAC_RX_CLK

IO18

I/O

GPIO18, VSPICLK, HS1_DATA7

IO19

I/O

GPIO19, VSPIQ, U0CTS, EMAC_TXD0

IO21 33 I/O GPIO21, VSPIHD, EMAC_TX_EN

RXD0 34 I/O GPIO3, U0RXD, CLK_OUT2

TXD0

I/O

GPIO1, U0TXD, CLK_OUT3, EMAC_RXD2

IO22

I/O

GPIO22, VSPIWP, U0RTS, EMAC_TXD1

IO23

I/O

GPIO23, VSPID, HS1_STROBE

GND

Ground

2 . PIN DEFINITIO NS

Note:

Firmware can configure register bits to change the settings of ”Voltage of Internal LDO (VDD_SDIO)” and ”Timing of SDIO

Slave” after booting.

2.3

Strapping Pins

Please refer to ESP01 schematics.

ESP32 has five strapping pins, which can be seen in Chapter 6 Schematics:

•

MTDI

•

GPIO0

•

GPIO2

•

MTDO

•

GPIO5

Software can read the value of these five bits from the register ”GPIO_STRAPPING”.

During the chip’s system reset (power-on reset, RTC watchdog reset and brownout reset), the latches of the

strapping pins sample the voltage level as strapping bits of ”0” or ”1”, and hold these bits until the chip is powered

down or shut down. The strapping bits configure the device boot mode, the operating voltage of VDD_SDIO and

other system initial settings.

Each strapping pin is connected with its internal pull-up/pull-down during the chip reset. Consequently, if a strap-

ping pin is unconnected or the connected external circuit is high-impendence, the internal weak pull-up/pull-down

will determine the default input level of the strapping pins.

To change the strapping bit values, users can apply the external pull-down/pull-up resistances, or apply the host

MCU’s GPIOs to control the voltage level of these pins when powering on ESP32.

After reset, the strapping pins work as the normal functions pins.

Refer to Table 4 for detailed boot modes’ configuration by strapping pins.

Table 4: Strapping Pins

Voltage of Internal LDO (VDD_SDIO)

Default

3.3V

1.8V

MTDI

Pull-down

Booting Mode

Pin Default SPI Boot Download Boot

GPIO0 Pull-up 1 0

GPIO2 Pull-down Don’t-care 0

Debugging Log on U0TXD During Booting

Pin Default U0TXD Toggling U0TXD Silent

MTDO

Pull-up

Timing of SDIO Slave

Pin Default

Falling-edge Input

Falling-edge Output

Falling-edge Input

Rising-edge Output

Rising-edge Input

Falling-edge Output

Rising-edge Input

Rising-edge Output

MTDO Pull-up 0 0 1 1

GPIO5 Pull-up 0 1 0 1

3 . FUN CTIO N AL D ESC RIPTIO N

Functional Description

This chapter describes the modules and functions integrated in ESP01.

3.1

CPU and Internal Memory

ESP32-D0WD contains two low-power Xtensa® 32-bit LX6 microprocessors. The internal memory includes:

•

448 kB of ROM for booting and core functions.

•

520 kB (8 kB RTC FAST Memory included) of on-chip SRAM for data and instruction.

–

8 kB of SRAM in RTC, which is called RTC FAST Memory and can be used for data storage; it is

accessed by the main CPU during RTC Boot from the Deep-sleep mode.

•

8 kB of SRAM in RTC, which is called RTC SLOW Memory and can be accessed by the co-processor during

the Deep-sleep mode.

•

1 kbit of eFuse, of which 256 bits are used for the system (MAC address and chip configuration) and the

remaining 768 bits are reserved for customer applications, including Flash-Encryption and Chip-ID.

3.2

External Flash and SRAM

ESP32 supports up to four 16-MB of external QSPI flash and SRAM with hardware encryption based on AES to

protect developers’ programs and data.

ESP32 can access the external QSPI flash and SRAM through high-speed caches.

•

Up to 16 MB of external flash are memory-mapped onto the CPU code space, supporting 8, 16 and 32-bit

access. Code execution is supported.

•

Up to 8 MB of external flash/SRAM are memory-mapped onto the CPU data space, supporting 8, 16 and

32-bit access. Data-read is supported on the flash and SRAM. Data-write is supported on the SRAM.

ESP01 integrates 4 MB of external SPI flash. The 4-MB SPI flash can be memory-mapped onto the CPU code

space, supporting 8, 16 and 32-bit access. Code execution is supported. The integrated SPI flash is connected

to GPIO6, GPIO7, GPIO8, GPIO9, GPIO10 and GPIO11. These six pins cannot be used as regular GPIO.

3.3

Crystal Oscillators

The ESP32 Wi-Fi firmware can only support 40 MHz crystal oscillator for now.

3 . FUN CTIO N AL D ESC RIPTIO N

3.4

RTC and Low-Power Management

With the use of advanced power management technologies, ESP32 can switch between different power modes

(see Table 5).

•

Power modes

–

Active mode: The chip radio is powered on. The chip can receive, transmit, or listen.

–

Modem-sleep mode: The CPU is operational and the clock is configurable. The Wi-Fi base- band and

radio are disabled.

–

Light-sleep mode: The CPU is paused. The RTC memory and RTC peripherals, as well as the ULP

co-processor are running. Any wake-up events (MAC, host, RTC timer, or external interrupts) will wake

up the chip.

–

Deep-sleep mode: Only the RTC memory and RTC peripherals are powered on. Wi-Fi connection

data are stored in the RTC memory. The ULP co-processor can work.

–

Hibernation mode: The internal 8-MHz oscillator and ULP co-processor are disabled. The RTC recovery

memory is powered down. Only one RTC timer on the slow clock and some RTC GPIOs are active.

The RTC timer or the RTC GPIOs can wake up the chip from the Hibernation mode.

•

Sleep Patterns

–

Association sleep pattern: The power mode switches between the Active mode, Modem- and Light-

sleep mode during this sleep pattern. The CPU, Wi-Fi and radio are woken up at predeter- mined

intervals to keep Wi-Fi connections alive.

–

ULP sensor-monitored pattern: The main CPU is in the Deep-sleep mode. The ULP co-processor takes

sensor measurements and wakes up the main system, based on the data collected from sensors.

Table 5: Functionalities Depending on the Power Modes

Power mode

Active

Modem-sleep

Light-sleep

Deep-sleep

Hibernation

Sleep pattern Association sleep pattern

ULP sensor-

monitored pattern -

CPU

PAUSE

OFF

Wi-Fi baseband and radio

OFF

RTC memory and RTC pe-

ripherals

OFF

ULP co-processor

ON/OFF

OFF

Thepowerconsumption varies with differentpowermodes/sleeppatternsandwork statusesoffunctional modules.

Please see Table 6 for details.

Table 6: Power Consumption by Power Modes

Power mode Description Power consumption

Active (RF working)

Wi-Fi Tx packet 14 dBm

19.5 dBm

Please refer to ESP32 Datasheet.

Wi-Fi Tx packet 0 dBm

Wi-Fi Rx and listening

Association sleep pattern (by Light-sleep)

1 mA

4 mA @DTIM3

3 . FUN CTIO N AL D ESC RIPTIO N

Note:

•

When Wi-Fi is enabled, the chip switches between Active and Modem-sleep mode. Therefore, power consumption

changes accordingly.

•

In Modem-sleep mode, the CPU frequency changes automatically. The frequency depends on the CPU load and

the peripherals used.

•

During Deep-sleep, when the ULP co-processor is powered on, peripherals such as GPIO and I2C are able to

work.

•

When the system works in the ULP sensor-monitored pattern, the ULP co-processor works with the ULP sensor

periodically; ADC works with a duty cycle of 1%, so the power consumption is 100 µA.

Power mode Description Power consumption

Modem-sleep

The CPU is powered on.

Max speed 240 MHz: 30 mA ~ 50 mA

Normal speed 80 MHz: 20 mA

25 mA

Slow speed 2 MHz: 2 mA

4 mA

Light-sleep - 0.8 mA

Deep-sleep

The ULP co-processor is powered on.

150

ULP sensor-monitored pattern

100 µA @1% duty

RTC timer + RTC memory

Hibernation

RTC timer only

Power off

CHIP_PU is set to low level, the chip is powered off

0.1

4 . P ERIP H ERALS AN D SENSO RS

Peripherals and Sensors

4.1

Peripherals and Sensors Description

Table 7: Description of Peripherals and Sensors

Interface

Signal

Function

ADC

ADC1_CH0

SENSOR_VP

Two 12-bit SAR ADCs

ADC1_CH3

SENSOR_VN

ADC1_CH4

IO32

ADC1_CH5

IO33

ADC1_CH6

IO34

ADC1_CH7

IO35

ADC2_CH0

IO4

ADC2_CH1

IO0

ADC2_CH2

IO2

ADC2_CH3

IO15

ADC2_CH4

IO13

ADC2_CH5

IO12

ADC2_CH6

IO14

ADC2_CH7

IO27

ADC2_CH8

IO25

ADC2_CH9

IO26

Ultra-Low Noise

Analog Pre-Amplifier

SENSOR_VP

IO36 Provides about 60 dB gain by using larger

capacitors on PCB

SENSOR_VN

IO39

DAC

DAC_1

IO25

Two 8-bit DACs

DAC_2

IO26

Touch Sensor

TOUCH0

IO4

Capacitive touch sensors

TOUCH1

IO0

TOUCH2

IO2

TOUCH3

IO15

TOUCH4

IO13

TOUCH5

IO12

TOUCH6

IO14

TOUCH7

IO27

TOUCH8

IO33

TOUCH9

IO32

SD/SDIO/MMC Host

Controller

HS2_CLK

MTMS

Supports SD memory card V3.01 standard

HS2_CMD

MTDO

HS2_DATA0

IO2

HS2_DATA1 IO4

HS2_DATA2 MTDI

HS2_DATA3

MTCK

Espressif Systems 9 ESP01 Datasheet V1.0

Inhaltsverzeichnis

Andere Espressif Steuereinheit Handbücher

Espressif

Espressif ESP8266 Series Gebrauchs- und Pflegehandbuch

Espressif

Espressif PAN100 Bedienungsanleitung

Espressif

Espressif ESP32-WATG-32D Bedienungsanleitung

Espressif

Espressif ESP32--MINI--1 Bedienungsanleitung

Beliebte Steuereinheit Handbücher anderer Marken

Festo

Festo Compact Performance CP-FB6-E Stücklistenhandbuch

Elo TouchSystems

Elo TouchSystems DMS-SA19P-EXTME Bedienungsanleitung

JS Automation

JS Automation MPC3034A Bedienungsanleitung

JAUDT

JAUDT SW GII 6406 Series Kurzanleitung

Spektrum

Spektrum Air Module System Bedienungsanleitung

BOC Edwards

BOC Edwards Q Series Bedienungsanleitung

KHADAS

KHADAS BT Magic Bedienungsanleitung

Etherma

Etherma eNEXHO-IL Bedienungsanleitung

PMFoundations

PMFoundations Attenuverter Bedienungsanleitung

GEA

GEA VARIVENT Bedienungsanleitung

Walther Systemtechnik

Walther Systemtechnik VMS-05 Bedienungsanleitung

Altronix

Altronix LINQ8PD Montageanleitung

Eaton

Eaton Powerware Series Bedienungsanleitung

WAGO

WAGO 750-407/040-000 Bedienungsanleitung

Sony

Sony CCU-590 Bedienungsanleitung

Graco

Graco 25D614 Bedienungsanleitung

Task Force Tips

Task Force Tips YE-RF-900 Programmierhandbuch

Shini

Shini SPV-U Series Bedienungsanleitung