Espressif Systems ESP8266EX User manual

CONFIDENTIAL
Espressif
Systems
ESP8266EX Beginner’s Guide
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ESPRESSIF
ESP8266EX:
A BEGINNER’S GUIDE
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ESP8266EX Beginner’s Guide
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ESP8266EX Beginner’s Guide
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Disclaimer and Copyright Notice
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 MERCHANTABILITY, NONINFRINGEMENT, FITNESS
FOR ANY PARTICULAR PURPOSE, OR ANY WARRANTY OTHERWISE ARISING OUT OF
ANY PROPOSAL, SPECIFICATION OR SAMPLE. All liability, including liability for
infringement of any proprietary rights, relating to use of information in this document 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.
All trade names, trademarks and registered trademarks mentioned in this document are
property of their respective owners, and are hereby acknowledged.
Copyright © 2013 Espressif Systems Inc. All rights reserved.
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ESP8266EX Beginner’s Guide
Table of Contents
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1. INTRODUCTION 7.....................................................................................................................................
1.1. GENERAL OVERVIEW 7...........................................................................................................................
1.1.1. Features 9
1.1.2. Specifications 9.............................................................................................................................
1.1.3. Applications 11
1.2. HARDWARE OVERVIEW 12.....................................................................................................................
1.2.1. Pin Definition 12...........................................................................................................................
1.2.2. Electrical Characteristics 14...........................................................................................................
1.2.3. Power Consumption 14.................................................................................................................
1.2.4. Package Footprint 15.....................................................................................................................
1.2.5. Hardware Development Kit 16......................................................................................................
1.2.6. ESP8266EX Modules (WROOM) 18..............................................................................................
1.3. APPLICATIONS USING ESP8266EX 20......................................................................................................
1.3.1. UART Connector (as in Fig. 4 Demo Board) 20............................................................................
1.3.2. Sensor Application (as in Fig. 5 USB Sensor Demo) 20.................................................................
1.3.3. Smart Light Application (as in Fig. 6 Smart Light Demo) 21...........................................................
1.3.4. Wi-Fi Smart Plug Application 23....................................................................................................
2. SOFTWARE FEATURES 24............................................................................................................................
2.1. WIRELESS NETWORKING 24....................................................................................................................
2.1.1. SoftAP Mode 24
2.1.2. Station Mode 25
2.1.3. SoftAP + Station Mode 25.............................................................................................................
2.2. PASS-THROUGH CONNECTION 26...........................................................................................................
2.3. UART FRAMES 26.................................................................................................................................
2.4. ENCRYPTION 27....................................................................................................................................
2.5. LOW POWER OPERATION 28..................................................................................................................
2.6. FIRMWARE UPDATER 28.........................................................................................................................
3. ESPRESSIF CLOUD SERVER 29.....................................................................................................................
3.1. GUIDE TO USING ESPRESSIF CLOUD SERVER WEBSITE 29............................................................................
3.1.1. Device Development 31...............................................................................................................
3.1.2. Product Management 35...............................................................................................................
3.2. GUIDE TO USING ESP8266EX MODULES 36............................................................................................
3.2.1. Software Debugging Tools 36.......................................................................................................
3.2.2. Network Connections 36..............................................................................................................
3.2.3. Default Connection Parameters 36................................................................................................
3.3. APPLICATION EXAMPLES 37.....................................................................................................................
3.3.1. Wi-Fi Remote Control 37...............................................................................................................
3.3.2. Wi-Fi Remote Access 37................................................................................................................
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ESP8266EX Beginner’s Guide
3.3.3. Transparent Serial 38.....................................................................................................................
4. AT INSTRUCTION SET 39...........................................................................................................................
4.1. OVERVIEW 39
4.2. BASIC AT INSTRUCTIONS 39...................................................................................................................
4.3. WI-FIINSTRUCTIONS 40........................................................................................................................
4.4. TCP/IP TOOLBOX 42.............................................................................................................................
5. DEVELOPMENT KIT 48................................................................................................................................
5.1. COMPONENTS OF ESP8266EX DEVELOPMENT KIT 48...............................................................................
5.2. DOCUMENTATION LIST 49......................................................................................................................
APPENDIX: CONTACT DETAILS 50.................................................................................................................
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ESP8266EX Beginner’s Guide
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ESP8266EX Beginner’s Guide
1. Introduction
1.1. General Overview
Espressif Systems’ Smart Connectivity Platform (ESCP) is a set of high performance, high
integration wireless SOCs, designed for space and power constrained mobile platform
designers. It provides 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.
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Figure 1: ESP8266EX Block Diagram
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ESP8266EX offers a complete and self-contained Wi-Fi networking solution; it can be used
to host the application 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
integrated cache to improve the performance of the system in such applications.
Alternately, serving as a Wi-Fi adapter, wireless internet access can be added to any
microcontroller-based design with simple connectivity (SPI/SDIO or I2C/UART interface).
ESP8266EX is among the most integrated WiFi chip in the industry; it integrates the
antenna switches, RF balun, power amplifier, low noise receive amplifier, filters, power
RF
receive
Analog
receive
RF
transmit
Analog
transmit
RF balun
PLL
Digital baseband
PMUSRAM
Registers
CPU
Sequencers
Accelerator
MAC
SDIO
SPI
GPIO
I2C
Interface
Bias circuits
Switch
VCO 1/2 PLL
PMU Crystal
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ESP8266EX Beginner’s Guide
management modules, it requires minimal external circuitry, and the entire solution,
including front-end module, is designed to occupy minimal PCB area.
ESP8266EX also integrates an enhanced version of Tensilica’s L106 Diamond series 32-bit
processor, with on-chip SRAM, besides the Wi-Fi functionalities. ESP8266EX is often
integrated with external sensors and other application specific devices through its GPIOs;
codes for such applications are provided in examples in the SDK.
Sophisticated system-level features include fast 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, LCD interference mitigation.
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ESP8266EX Beginner’s Guide
1.1.1. Features
▪802.11 b/g/n protocol
▪Wi-Fi 2.4 GHz, support WPA/WPA2
▪Super small module size (11.5mm x 11.5mm)
▪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
▪+20dBm output power in 802.11b mode
▪Supports antenna diversity
▪Deep sleep power <10uA, Power down leakage current < 5uA
▪Integrated low power 32-bit MCU
▪SDIO 2.0, SPI, UART
▪STBC, 1x1 MIMO, 2x1 MIMO
▪A-MPDU & A-MSDU aggregation & 0.4µs guard interval
▪Wake up and transmit packets in < 2ms
▪Standby power consumption of < 1.0mW (DTIM3)
▪Operating temperature range -40C ~ 125C
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1.1.2. Specifications
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Category
Parameter
Value
Wi-Fi
Standard
CCC/FCC/CE
Wi-Fi
802.11b/g/n
Frequency
2.4G-2.5G (2400M-2483.5M)
Tx Power
802.11b: 20dBm
802.11g: 17dBm
802.11n: 14dBm
Rx Sensitivity
802.11b: (11Mbps) -91dBm
802.11g: (54Mbps) -75dBm
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ESP8266EX Beginner’s Guide
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802.11n: (MCS7) -72dBm
Antenna
PCB Trace, External, IPEX
Connector, Ceramic Chip
Hardware
Data Interface
UART/SDIO/SPI/I2C
PWM, GPIO
Operating Voltage
3.0~3.6V
Operating Current
Avg. 80mA
Operating Temperature
-40 C ~ 125 C
Storage Temperature
Room Temperature
Size
5x5mm
External Interface
N.A.
Software
Wi-Fi Mode
Station/SoftAP/SoftAP+Station
Security
WPA/WPA2
Encryption
WEP/TKIP/AES
Firmware Upgrade
UART Flash Download /
Via Cloud Server
SW Development
Supports Cloud Server
Development / SDK for custom
firmware development
Network Protocols
IPv4. TCP/UDP/HTTP/FTP
User Config
AT Instruction Set, Cloud Server,
Android/iOS App
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