Ai-Thinker ESP-01 User manual

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notice or indication of the circumstances the right to modify the content of this manual. This manual is used
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this manual all statements, information and advice nor does it constitute any express or imp
ESP-
01 WiFi Module
Information in this document, including URL references, is subject to change without notice
.
DOCUMENT IS PROVIDED AS IS WITH NO WARRANTIES WHATSOEVER, INCLUDING ANYWARRANTY OF MERCHANTABILITY, NON
PURPOSE, OR ANY WARRANTY OTHERWISE ARISING OUT OF ANY PROPOSAL,
g liability for infringement of any proprietary rights, relating to use
document is disclaimed. No licenses express or implied, by estoppel or
otherwise, to any intellectual property rights are granted herein.
r Logo is a trademark of the WiFi Alliance.
All trade names, trademarks and registered trademarks mentioned in this document are property of
their respective owners, and are
All rights reserved
.
Product version upgrades or other reasons, possible changes i
n the contents of this manual. AI-
Thinker reserves i
notice or indication of the circumstances the right to modify the content of this manual. This manual is used only as a guide,
make every effort to provide accurate information in this manual, but
Ai-thinker
does not ensure that manual content without error, in
this manual all statements, information and advice nor does it constitute any express or imp
lied warranty.
01 WiFi Module
Version1.0
DOCUMENT IS PROVIDED AS IS WITH NO WARRANTIES WHATSOEVER, INCLUDING ANYWARRANTY OF MERCHANTABILITY, NON
-
PURPOSE, OR ANY WARRANTY OTHERWISE ARISING OUT OF ANY PROPOSAL,
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Thinker reserves i
n the absence of any
only as a guide,
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does not ensure that manual content without error, in
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Table of Contents
1. Preambles
................................
1.1. Features
................................
1.2. Parameters
................................
2. Pin Descriptions
................................
3.
Packaging and Dimension
4.
Functional Descriptions
4.1. MCU
................................
4.2.
Memory Organization
4.2.1.
Internal SRAM and ROM
4.2.2.
External SPI Flash
4.3. Crystal
................................
4.4. Interfaces
................................
4.5.
Absolute Maximum Ratings
4.6.
Recommended Operating Conditions
4.7.
Digital Terminal Characteristics
5. RF Performance
................................
6. Power Consumption
................................
7. Reflow Profile
................................
8. Schematics
................................
Table of Contents
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Packaging and Dimension
................................
................................
Functional Descriptions
................................
................................
................................
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...............................
Memory Organization
................................
................................
Internal SRAM and ROM
................................
...........................
External SPI Flash
................................
................................
................................
................................
............................
................................
................................
.......................
Absolute Maximum Ratings
................................
..........................
Recommended Operating Conditions
................................
Digital Terminal Characteristics
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4
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12
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16
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18
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19

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1.
Preambles
ESP-01 WiFi
module is developed by
encapsulates
Tensilica L106 integrates industry
Clock speed support 80 MHz, 160 MHz, supports the RTOS, integrated Wi
The module supports standard IEEE802.11
add modules to an existing device networking, or building a separate network controller.
ESP8266 is high integration
wireless SOCs, designed for space and power constrained mobile platform
It provides
unsurpassed ability to embed Wi
application, with the lowest cost, and minimal space requirement.
Figure 1 ESP8266EX Block Diagram
ESP8266EX offers a complete and
self
or to offload Wi-
Fi networking functions from another application processor
When ESP8266EX hosts the application, it boots up directly from an external flash. In has
improve the performance of the system in such applications.
Alternately, serving as a Wi-
Fi adapter, wireless internet access can be added to any micro controllerbased design
with simple connectivity (SPI/SDIO or I2C/UART interface).
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module is developed by
Ai-thinker Team.
core processor ESP8266 in smaller sizes of the module
Tensilica L106 integrates industry
-leading ultra low power 32-
bit MCU micro, with the 16
Clock speed support 80 MHz, 160 MHz, supports the RTOS, integrated Wi
-Fi MAC
/BB/RF/PA/LNA, on
The module supports standard IEEE802.11 b/g/n agreement, complete TCP/IP protocol stack. Users can use the
add modules to an existing device networking, or building a separate network controller.
wireless SOCs, designed for space and power constrained mobile platform
unsurpassed ability to embed Wi
-
Fi capabilities within other systems, or to function as a standalone
application, with the lowest cost, and minimal space requirement.
Figure 1 ESP8266EX Block Diagram
self
-contained Wi-
Fi networking solution; it can be used to host
Fi networking functions from another application processor
.
When ESP8266EX hosts the application, it boots up directly from an external flash. In has integrated
improve the performance of the system in such applications.
Fi adapter, wireless internet access can be added to any micro controllerbased design
with simple connectivity (SPI/SDIO or I2C/UART interface).
3
core processor ESP8266 in smaller sizes of the module
bit MCU micro, with the 16
-bit short mode,
/BB/RF/PA/LNA, on
-board antenna.
b/g/n agreement, complete TCP/IP protocol stack. Users can use the
wireless SOCs, designed for space and power constrained mobile platform
designers.
Fi capabilities within other systems, or to function as a standalone
Fi networking solution; it can be used to host
the application
integrated
cache to
Fi adapter, wireless internet access can be added to any micro controllerbased design

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ESP8266EX is among the most integrated WiFi chip in the industry; it integrates the antenna
power amplifier, low noise receive amplifier, filters, power management modules,
and the entire solution, including front-
end module, is designed
ESP8266EX also integrates an enhanced version of Tensilica’s L106 Diamond series 32
SRAM, besides the Wi-
Fi functionalities. ESP8266EX is often integrated wit
specific devices through its GPIOs; codes for such applications are
Espressif Systems’ Smart Connectivity Platform (ESCP) demonstrates sophisticated system
fas
t sleep/wake context switching for energy
signal processing, and spur cancellation and radio co
LCD interference mitigation.
1.1.
Features
•
802.11 b/g/n
•
Integrated low power 32-bit MCU
•
Integrated 10-bit ADC
•
Integrated TCP/IP protocol stack
•
Integrated TR switch, balun, LNA, power amplifier and matching network
•
Integrated PLL, regulators, and power management units
•
Supports antenna diversity
•
Wi-Fi 2.4 GHz, support WPA/WPA2
•
Support STA/AP/STA+AP operation modes
•
Support Smart Link Function for both Android and iOS devices
•
Support Smart Link Function for both Android and iOS devices
•
SDIO 2.0, (H) SPI, UART, I2C, I2S, IRDA, PWM,
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ESP8266EX is among the most integrated WiFi chip in the industry; it integrates the antenna
power amplifier, low noise receive amplifier, filters, power management modules,
it requires minimal external circuitry,
end module, is designed
to occupy minimal PCB area.
ESP8266EX also integrates an enhanced version of Tensilica’s L106 Diamond series 32
-
bit processor,
Fi functionalities. ESP8266EX is often integrated wit
h external
sensors and other application
specific devices through its GPIOs; codes for such applications are
provided in examples in the SDK.
Espressif Systems’ Smart Connectivity Platform (ESCP) demonstrates sophisticated system-
t sleep/wake context switching for energy
-efficient VoIP, adaptive radio biasing. for low-
power operation, advance
signal processing, and spur cancellation and radio co
-existence
features for common cellular, Bluetooth, DDR, LVDS,
Integrated TR switch, balun, LNA, power amplifier and matching network
Integrated PLL, regulators, and power management units
Support STA/AP/STA+AP operation modes
Support Smart Link Function for both Android and iOS devices
Support Smart Link Function for both Android and iOS devices
SDIO 2.0, (H) SPI, UART, I2C, I2S, IRDA, PWM,
GPIO
4
ESP8266EX is among the most integrated WiFi chip in the industry; it integrates the antenna
switches, RF balun,
it requires minimal external circuitry,
bit processor,
with on-chip
sensors and other application
provided in examples in the SDK.
-
level features include
power operation, advance
features for common cellular, Bluetooth, DDR, LVDS,

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•
STBC, 1x1 MIMO, 2x1 MIMO
•
A-MPDU & A-
MSDU aggregation and 0.4s guard interval
•
Deep sleep power <10uA, Power down leakage current < 5uA
•
Wake up and transmit packets in < 2ms
•
Standby power consumption of < 1.0mW (DTIM3)
•
+20dBm output power in 802.11b
mode
•
Operating temperature range -
40C ~ 125C
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MSDU aggregation and 0.4s guard interval
Deep sleep power <10uA, Power down leakage current < 5uA
Wake up and transmit packets in < 2ms
Standby power consumption of < 1.0mW (DTIM3)
mode
40C ~ 125C
5

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1.2.
Parameters
Table 1 below describes the major parameters.
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Table 1 below describes the major parameters.
Table 1 Parameters
6

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2.
Pin Descriptions
There are altogether 8
pin counts, the definitions of which are described in Table 2 below
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pin counts, the definitions of which are described in Table 2 below
。
Table 2 ESP-01 Pin design
7

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NO.
1
2
3
4
5
6
7
8
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Table 2 Pin Descriptions
Pin Name
Function
GND
GPIO2 GPIO
,Internal Pull
GPIO0
GPIO,Internal Pull
RXD
UART0,data received pin RXD
VCC
3.3V power supply (VDD)
RST
1)
External reset pin
2)
Can loft or external MCU
CH_PD
Chip enable pin. Active high
TXD
UART0,data
8
Function
GND
,Internal Pull
-up
GPIO,Internal Pull
-up
UART0,data received pin RXD
3.3V power supply (VDD)
External reset pin
,
active low
Can loft or external MCU
,
Chip enable pin. Active high
UART0,data
send pin RXD

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Mode
GPIO15
UART
Low
Flash Boot
Low
Table
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Table 3 Pin Mode
GPIO15
GPIO0
Low
Low
Low
High
Table
4 Receiver Sensitivity
9
GPIO2
High
High

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3.
Packaging and Dimension
The external size of the module is 14.3
mm*2
integrated in this module is an SPI f
lash, the capacity of which is
The antenna applied on this module is a 3DBi PCB
Figure 3
[Module Pin Counts,
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Packaging and Dimension
mm*2
4.8mm*3mm, as is illustrated in Figure 3
below. The type of
lash, the capacity of which is
1 MB, and the package size of
which is SOP
The antenna applied on this module is a 3DBi PCB
-on-board antenna.
[Module Pin Counts,
8 pin, 14.3 mm *24.8 mm *
3.0 mm]
10
below. The type of
flash
which is SOP
-210mil.
3.0 mm]