Ai Thinker Technology ESP01F WiFi module User Manual

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ESP-01/07/12 Series Modules User's Manual

Version 1.4

Ai-Thinker Inc

(c)

2017

Ai-Thinker

ESP

01/07/12 Series Modules User's Manual V1.

Revision Record

Date Version Author Release Notes

2017.07.01 V1.0 Wang Chong First Version

2017.09.04 V1.1 Wang Chong Add ESP-01M, Delete ESP-12E

2017.12.18 V1.2 Fang Dongbin Modify the GPIO4 pin description, change

the contact number

2018.3.10 V1.3 Lv Junxiong Add ESP-01F

2018.8.16 V1.4 Lv Junxiong Add ESP-01E

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FCC STATEMENT

Changes or modifications not expressly approved by the party responsible for compliance

could void the user’s authority to operate the equipment.

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, and

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

undesired operation.

Note: This equipment has been tested and found to comply with the limits for a Class B

digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide

reasonable protection against harmful interference in a residential installation. This equipment

generates, uses, and can radiate radio frequency energy, and if not installed and used in

accordance with the instructions, may cause harmful interference to radio communications.

However, there is no guarantee that interference will not occur in a particular installation. If

this equipment does cause harmful interference to radio or television reception, which can be

determined by turning the equipment off and on, the user is encouraged to try to correct the

interference by one or more of the following measures:

– Reorient or relocate the receiving antenna.

– Increase the separation between the equipment and receiver.

– Connect the equipment into an outlet on a circuit different from that to which the receiver

is connected.

– Consult the dealer or an experienced radio/TV technician for help.

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-ESP01M” or “Contains FCC

ID:2AHMR-ESP07S”or “Contains FCC ID:2AHMR-ESP12S” or “Contains FCC

ID:2AHMR-ESP12F” or “Contains FCC ID:2AHMR-ESP01E”or “Contains FCC

ID:2AHMR-ESP01F”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 20cm

between 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 t

o 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 con

figurations with respect to Part 2.1093 and difference antenna configurations.

There is requirement that the grantee provide guidance to the host manufacturer for complia

nce with Part 15B requirements.

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Table Of Contents

1 Product Overview ...........................................................................................1

1.1 Product Features ...................................................................................1

1.2 Application Plan ...................................................................................1

2 Module Interface.............................................................................................2

2.1 Package Size ........................................................................................2

2.1 Pin Definition .......................................................................................6

2.2 Boot Mode ...........................................................................................7

3 Electrical Characteristics.................................................................................8

3.1 Maximum Ratings ................................................................................8

3.2 Suggested Working Environment .........................................................8

3.3 Digital Port Features ............................................................................8

3.4 Power Consumption .............................................................................8

3.5 Transmit Power .................................................................................. 10

3.6 Receive Sensitivity ............................................................................. 10

4 Hardware Guidance ...................................................................................... 11

4.1 Typical Applications .......................................................................... 11

4.2 PCB Antenna Display Instructions ..................................................... 13

4.3 Module Peripheral Routing Instructions ............................................. 14

4.4 GPIO Level Conversion ..................................................................... 15

4.5 Power Supply Reference Design ........................................................ 15

4.6 ADC Supply Reference Design .......................................................... 15

4.7 Automatically Download Reference Design ....................................... 16

4.8 Reflow oven temperature curve .......................................................... 16

5 Usage Guide ................................................................................................. 17

5.1 Introduction To The Basic AT Command ........................................... 17

5.1.1 AT ........................................................................................... 17

5.1.2 AT+GMR ................................................................................ 17

5.1.3 AT+RST .................................................................................. 17

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5.1.4 AT+RESTORE........................................................................ 18

5.2 Use Examples .................................................................................... 18

5.2.1 TCP Communication Test ........................................................ 18

5.2.2 UDP Communication Test ....................................................... 20

6 FAQ ............................................................................................................. 22

6.1 Garbage Instructions When Power Is On ............................................ 22

6.2 How To Shield The Power When The Garbled ................................... 22

6.3 Can’t Burn Normally ....................................................................... 22

6.4 SDK Development Environment ........................................................ 23

6.5 Startup Information Description ......................................................... 23

7 Module Selection .......................................................................................... 23

8 Contact US ................................................................................................... 25

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1 Product Overview

ESP8266 series wireless module is a series of cost-effective Wi-Fi SOC module

which can be developed independently. The series modules support the standard

IEEE802.11 b/g/n protocol, built-in complete TCP/IP protocol stack. Users can use

this series of modules to add networking capabilities to existing devices, or to build

standalone network controllers.

Ai-Thinker Technology can provide customers with a complete hardware,

software reference program, in order to shorten your product development cycle, for

your cost savings.

1.1 Product Features

The smallest 802.11b/g/n Wi-Fi SOC module

Using low-power 32-bit CPU, can also serve as the application

processor

Clocked at up to 160MHz

Built-in 10 bit high precision ADC

Support UART/GPIO/IIC/PWM/ADC/HSPI and other interfaces

Integrated Wi-Fi MAC/BB/RF/PA/LNA

Supports multiple sleep modes, deep sleep current as low as 20uA

Embedded Lwip protocol stack

Support STA/AP/STA + AP work mode

Supports Smart Config/AirKiss key distribution network

Serial port rate up to 4Mbps

General AT commands can be used quickly

Support SDK secondary development

Supports serial local upgrade and remote firmware upgrade (FOTA)

1.2 Application Plan

Industrial wireless control

Infant Monitor

IP camera

Sensor network

Household appliances

Home automation

Smart socket/intelligent light

Mesh network

Wearable electronic products

Wireless location sensing device

Security ID tag

Wireless positioning system beacon

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2 Module Interface

2.1 Package Size

Figure 2.1 ESP-01/ESP-01S pin dimensions

Figure 2.2 ESP-01M pin dimensions

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Figure 2.3 ESP-01F pin dimensions

Figure 2.4 ESP-07 pin dimensions

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Figure 2.5 ESP-07S pin dimensions

Figure 2.6 ESP-12F pin dimensions

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Figure 2.7 ESP-12S pin dimensions

Figure 2.7 ESP-01E pin dimensions

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Table 2.1 ESP series module size table

Model Length

(mm)

Width

(mm)

Height

(mm

PAD size

(mm)

Spacing

(mm)

Shield

Shell

(mm)

Thickness

(mm)

ESP-01

ESP-01S 24.7 14.4 11.0 1.5 x 1.5 2.54 - 1.0±0.1

ESP-01M 18 18 2.8±0.2 - 1.6 2.0 0.8±0.1

ESP-01F 11 10 2.0±0.2 1.1 1.2 0.8±0.1

ESP-07 21.2 16.0 3.0±0.2 - 2.0 2.0 0.8±0.1

ESP-07S 17.0 16.0 3.0±0.3 1 x 1.2 2.0 2.0 0.8±0.1

ESP-12F 24.0 16.0 3.0±0.2 2.0 2.0 0.8±0.1

ESP-12S 24.0 16.0 3.0±0.2 1 x 1.2 2.0 2.0 0.8±0.1

2.1 Pin Definition

Table 2.2 ESP Series Module Pin Function Definitions

Pin Number Pin

Nam

Remarks

01S 01M 01E 01F

07S

12S

12F

7 18 18 16 1 1 RST Reset Pin, Active Low

-16 16 32 2 ADC AD conversiont, Input voltage

range 0~1V, the value range

6 9 9 43 3 EN Chip Enabled Pin, Active High

-17 17 54 4 IO16 Connect with RST pin to wake

up Deep Sleep

-15 15 65 5 IO14 HSPI_CLKIR_T

I2C_SCL



I2SI_WS

- 14 14 76 6 IO12 HSPI_MISO

- 5 5 87 7 IO13 HSPI_MOSI; UART0_CTS

8 2 2 17 8 8 VCC Module power supply pin, the

voltage range of 3.0 ~ 3.6V

- - - --9CS0 Flash chip select signal

- - - --10 MIS

Slave Output Master Input

- 11 11 --11 IO9 Gpio9Only ESP-01M/01E Can

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-12 12 --12 IO10 Gpio10,Only ESP-01M/01E Can

- - - --13 MOS

Master Output Slave Input

- - - --14 SCL

Clock

1 1 1 2/18 915 GND GND

- 6 6 910 16 IO15 HSPI_CSU0_RTS

I2SO_BCK

2 7 7 10 11 17 IO2 U1_TXDI2C_SDAI2SO_WS

3 8 8 11 12 18 IO0 GPIO0HSPI_MISO

I2SI_DATA

-10 10 12 13 19 IO4 GPIO4

-13 13 13 14 20 IO5 IR_R

4 4 4 14 15 21 RXD GPIO3I2SO_DATA

5 3 3 15 16 22 TXD GPIO1

- - 1 1- - ANTOnly ESP-01F/01E Can

Note: Only GPIO4 and GPIO5 are low at boot time, the other GPIO are high.

2.2 Boot Mode

Table 2.3 Description of the ESP series module boot mode

Mode CH_PD

(EN) RST GPIO15 GPIO0 GPIO2 TXD0

Download

mode high high low low high high

Running

mode high high low high high high

Chip Test

mode high high - - - low

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3 Electrical Characteristics

3.1 Maximum Ratings

Table 3.1 Maximum Ratings

Rated value condition Value Unit

Storage Temperature --40 ~ 90 

Maximum Welding

Temperature

-250 

Supply Voltage IPC/JEDEC

J-STD-020

+3.0 ~ +3.6 V

3.2 Suggested Working Environment

Table 3.2 Recommended working environment

Work Environment Name Min Typ Max Unit

Operating Temperature -20 20 85 

Supply Voltage VDD 3.0 3.3 3.6 V

3.3 Digital Port Features

Table 3.3 Digital Port Features

Port Name Min Typ Max Unit

Input logic level low VIL -0.3 - 0.25 * VDD V

Input logic level high VIH 0.75 * VDD - VDD + 0.3 V

Output logic level low VOL N-0.1 * VDD V

Output logic level

high VOH 0.8 * VDD -N V

Note: Unless otherwise specified, the test conditions are: VDD = 3.3 V and

temperature 20 .

3.4 Power Consumption

All measurements are made at the antenna interface without SAW filters.

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All transmit data is based on a 90% duty cycle measured in the continuous firing

mode.

Table 3.4 Power consumption

Mode Min Ty

xUnit

Transmit 802.11b, CCK 11Mbps, POUT = +

17dBm

170 mA

Transmit 802.11g, OFDM 54Mbps, POUT = +

15dBm

140 mA

Transmit 802.11n, MCS7, POUT = + 13dBm 120 mA

Receive 802.11b, packet length 1024 bytes,

-80dBm

50 mA

Receive 802.11g, packet length 1024 bytes,

-70dBm

56 mA

Receive 802.11n, packet length 1024 bytes,

-65dBm

56 mA

Modem-Sleep20 mA

Light-Sleep2mA

Deep-Sleep20 uA

Power Off 1 uA

Note: Modem-Sleep is used to require the CPU to remain in operation, such as PWM or I2S.

When there is no data transmission while maintaining a WiFi connection, power off the WiFi

Modem circuit according to the 802.11 standard (eg U-APSD). For example, in DTIM3, every

sleep 300mS, wake up 3mS receive AP Beacon package, etc., the overall average current of about

20mA.

Note : Light-Sleep for CPU can be suspended applications, such as WiFi switch. If there

is no data transmission while maintaining a WiFi connection, the WiFi Modem circuit can be

switched off and the CPU is powered down according to the 802.11 standard (eg U-APSD). For

example, at DTIM3, every sleep 300 ms, wake up 3 ms to receive AP's Beacon packets, etc., the

overall average current is about 2 mA.

Note: Deep-Sleep is used for applications that do not have to keep the WiFi connection for a

long time, such as a sensor that measures the temperature once every 100 seconds. Every 300 s

wake up after 0.3s - 1s connected to the AP to send data, the overall average current can be much

smaller than 2mA.

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3.5 Transmit Power

Table 3.5 RF parameters

Describe Min Typ Max Unit

802.11b@11Mbps 14 16 18 dBm

802.11g@54Mbps 12 14 16 dBm

802.11n@HT20, MCS7 11 13 15 dBm

3.6 Receive Sensitivity

Table 3.6 Receiving Sensitivity

Parameter Min Typ Max Unit

DSSS, 1 Mbps -95 dBm

CCK, 11 Mbps -80 dBm

6 Mbps (1/2 BPSK) -88 dBm

54 Mbps (3/4 64-QAM) -70 dBm

HT20, MCS7 (65 Mbps, 72.2 Mbps) -67 dBm

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4 Hardware Guidance

4.1 Typical Applications

Note: You can’t use USB to TTL 3.3V or 5V power supply, it is recommended

to use two dry batteries or after conversion through the LDO 3.3V, it is strongly

recommended to buy a new development board.

Figure 4.1 Typical application of ESP-01

Figure 4.2 Typical application of ESP-01S

Figure 4.3 Typical application of ESP-01M

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Figure 4.4 Typical application of ESP-01F

Figure 4.5 Typical application of ESP-07

Figure 4.6 Typical application of ESP-07S

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Figure 4.7 Typical application of ESP-12E/ESP-12F

Figure 4.8 Typical application of ESP-12S

Figure 4.9 Typical application of ESP-01E

4.2 PCB Antenna Display Instructions

The ESP8266 series module can be soldered to the PCB board. In order to get

the best RF performance of the end product, please pay attention to the rational

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design of the module and the placement of the antenna on the bottom plate according

to this guide.

Option 1 (recommended):

Place the module along the edge of the PCB board, and the antenna is placed

outside the frame or along the board and the bottom is hollowed out;

Option 2:

The module placed along the PCB board side, the antenna placed along the

board and the bottom of the hollow;

Option 3:

Place the module along the board side of the board, the antenna placed along the

board and the bottom are not copper.

Figure 4.7 ESP-12S antenna placement instructions

4.3 Module Peripheral Routing Instructions

The ESP8266 series modules integrates high-speed GPIO and peripheral

interfaces, which can cause severe switching noise. If some applications require high

power and EMI characteristics, it is recommended to connect 10 to 100 ohms in

series on digital I/O lines. This can suppress overshoot when switching power

supplies and make the signal smooth. Series resistance can also prevent electrostatic

discharge (ESD) to some extent.

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4.4 GPIO Level Conversion

Figure 4.8 Transistor level conversion

4.5 Power Supply Reference Design

Figure 4.9 Power supply reference

4.6 ADC Supply Reference Design

Figure 4.10 ADC supply reference

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4.7 Automatically Download Reference Design

Figure 4.11 Automatically Download Reference Design

4.8 Reflow oven temperature curve

Figure 4.12 Reflow furnace temperature curve

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5 Usage Guide

ESP8266 series module factory default built-in AT firmware, and the default

baud rate of 115200, can refer to 4.1 typical application diagram to build the

minimum system circuit, then the AT command operation.

Serial and network debugging tools download: http://wiki.ai-thinker.com/tools

5.1 Introduction To The Basic AT Command

This chapter only describes the common AT commands, please refer to

http://wiki.aithinker.com/esp8266/docs#at

5.1.1 AT

parameters No

Description Test AT is OK

Example AT

5.1.2 AT+GMR

parameters No

Description Returns the firmware version information

Example

AT+GMR

AT version:1.2.0.0(Jul 1 2016 20:04:45)

SDK version:1.5.4.1(39cb9a32)

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Dec 2 2016 14:21:16

5.1.3 AT+RST

parameters No

Description soft restart module

Example

AT+RST

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5.1.4 AT+RESTORE

parameters No

Description Reset the module to factory settings

Example

AT+RESTORE

5.2 Use Examples

This section explains how to configure two modules through the serial port on

the PC side to communicate with each other over TCP/UDP. For more examples,

please refer to: http://wiki.ai-thinker.com/esp8266/examples/at_demo. Test, through

the PC side instead of one end of the module to establish the appropriate connection.

5.2.1 TCP Communication Test

TCP Server is in AP mode and TCP Client is Station mode.

TCP Server Configuration

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AT+CWMODE=2 //configured for AP mode

AT+CWSAP_DEF="TCP_Server","12345678",5,4 //Configure AP

information

AT+CIFSR //Query the local IP address

+CIFSR:APIP,"192.168.4.1"

+CIFSR:APMAC,"a2:20:a6:19:c7:0a"

AT+CIPMUX=1 //open multiple links

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AT+CIPSERVER=1 //open the server

0,CONNECT //There is a client connected to the server

+IPD,0,10:Ai-Thinker //received 10 data (Ai-Thinker)

AT+CIPSERVER=0 //Close the server

0,CLOSED //TCP connection is off

TCP Client Configuration

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AT+CWMODE=1 //configured for station mode

AT+CWJAP_DEF="TCP_Server","12345678" //Connect to AP

WIFI CONNECTED

WIFI GOT IP

AT+CIFSR //Query the local IP address

+CIFSR:STAIP,"192.168.4.2"

+CIFSR:STAMAC,"5c:cf:7f:91:8b:3b"

AT+CIPMUX=0 //open single link

AT+CIPSTART="TCP","192.168.4.1",333 //Connect to TCP server

CONNECT

AT+CIPSEND=10 //send 10 bytes of data to the server side

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>//After the emergence of the symbol serial port to send

Ai-Thinker (without carriage return line)

Recv 10 bytes //The serial port receives the data

SEND OK //sent successfully

CLOSED //TCP connection is closed

5.2.2 UDP Communication Test

One is in AP mode , the local port is 8001, and the other is Station mode. the

local port is 8002.

AP Configuration

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AT+CWMODE=2 //configured for AP mode

AT+CWSAP_DEF="TCP_Server","12345678",5,4 //AP information

AT+CIFSR //Query the local IP address

+CIFSR:APIP,"192.168.4.1"

+CIFSR:APMAC,"a2:20:a6:19:c7:0a"

AT+CIPSTART="UDP","192.168.4.2",8002,8001,0 //Open UDP

connection

CONNECT

+IPD,10:Ai-Thinker //received 10 data (Ai-Thinker)

AT+CIPSEND=10 //send 10 bytes of data to the server

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>//After the emergence of the symbol serial port to send

Ai-Thinker (without carriage return line)

Recv 10 bytes //The serial port receives the data

SEND OK

AT+CIPCLOSE //close the UDP connection

CLOSED

Station Configuration

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AT+CWMODE=2 //configured for station mode

AT+CWSAP_DEF="TCP_Server","12345678",5,4 //Connect to AP

AT+CIFSR //Query the local IP address

+CIFSR:STAIP,"192.168.4.2"

+CIFSR:STAMAC,"5c:cf:7f:91:8b:3b"

AT+CIPSTART="UDP","192.168.4.1",8001,8002,0 //Open UDP connection

CONNECT

AT+CIPSEND=10 //send 10 bytes of data to the server

>//After the emergence of the symbol serial port to send

Ai-Thinker (without carriage return line)

Recv 10 bytes //The serial port receives the data

SEND OK

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+IPD,10:Ai-Thinker //received 10 data (Ai-Thinker)

AT+CIPCLOSE //close the UDP connection

CLOSED

6 FAQ

6.1 Garbage Instructions When Power Is On

ESP8266 chip itself supports 26MHz and 40MHz crystal, if the use of 40MHz

crystal, the default baud rate of 115200, if the use of 26MHz crystal, the UART0

power after the baud rate = 26 * 115200/40 = 74880, the letter can be ESP8266

Series modules are used 26MHz, because the general serial port tool does not support

the baud rate, so there will be printed on the garbled.

You can use the security serial interface assistant to configure the baud rate

74880 to view the startup information.

Note: part of the USB to TTL does not support 74880 baud rate, the computer

comes with RS232 to TTL does not support 74880 baud rate, recommend the use of

FT232, CP2102, CH340 and other chips.

6.2 How To Shield The Power When The Garbled

U0TXD default power will be system printing, through the UART's internal pin

switching function, user_init () call system_uart_swap () function, the new U0TXD

change to GPIO15, U0RXD change to GPIO13, the hardware connection on the two

cited Feet can be serial communication.

Note: After the exchange, the download pin on the hardware is still the original

U0TXD and U0RXD.

6.3 Can’t Burn Normally

Refer to http://wiki.ai-thinker.com/esp_download to download, pay attention to

download before the module to ensure that the download mode.

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6.4 SDK Development Environment

Refer to http://wiki.ai-thinker.com/ai_ide_install to build the SDK development

environment.

6.5 Startup Information Description

Start, if the power and serial port connection is normal, then the baud rate 74880

to see the first sentence is as follows:

ets Jan 8 2013,rst cause:1, boot mode:(3,6)

The start and start modes of the module can be analyzed based on the print

information:

rst cause 

1: Power restart

2: External reset

4: Hardware watchdog reset

boot mode

The second in parentheses has no practical meaning, the first can refer to the

following table to start the information analysis:

Table 6.1 Startup Mode Description

Value Mode GPIO0 GPIO2 GPIO15

0 - 0 0 0

1Download Mode 0 1 0

2 - 1 0 0

3Run mode 1 1 0

4 - 0 0 1

5 - 0 1 1

6 - 1 0 1

7 - 1 1 1

7 Module Selection

model ESP-01 ESP-01S ESP-01M ESP-07 ESP-07S ESP-12F ESP-12S

Package DIP-8 DIP-8 SMD-18 SMD-16 SMD-16 SMD-22 SMD-16

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Size(mm) 24.7*14.4 24.7*14.4 18*18 21.2*16.0 17.0*16.0 24.0*16.0 24.0*16.0

layer 2 2 4 2 4 4 4

Flash size 8Mbit 8Mbit 8Mbit 8Mbit 32Mbit 32Mbit 32Mbit

Certificati

on ----FCC/CE FCC/CE FCC/CE

Antenna PCB PCB PCB Ceramic

IPEX IPEX PCB PCB

Indicator

light

TXD0

POWER GPIO2 GPIO2

POWER -GPIO2 GPIO2 GPIO2

Available

IO 2 2 11 9 9 9 9

For more selection information please see http://wiki.ai-thinker.com/esp8266 or

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8 Contact US

Official website: https://www.ai-thinker.com

Develop Wiki: http://wiki.ai-thinker.com

Official forum: http://bbs.ai-thinker.com

Sample purchase: https://anxinke.taobao.com

Business cooperation: sales@aithinker.com

Technical support: support@aithinker.com

Telephone: 0755-29162996

Company Address: 6/F, Block C2, Huafeng Industrial Park, Hangcheng Road,

Bao'an Road, Baoan District, Shenzhen ,China

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