Introduction - Espressif Systems ESP8266EX Programming Manual

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The ESP8266EX offers a complete and self-contained Wi-Fi SoC solution. With low power
consumption, a compact design and high stability, it caters to the needs of its users.
It can be used to host applications or to offload Wi-Fi network functions from other
application processors. When the ESP8266 hosts an application, as the only processor in
the device, it boots up directly from an external flash. It has an built-in, high-speed cache
which improves the performance of the system and optimizes the memory. Alternatively,
when the ESP8266EX is used as a Wi-Fi adapter, wireless internet access can be added to
any microcontroller-based device through the SPI/SDIO interface or the I2C/UART
interface, and thus provide the users with a simple Wi-Fi solution.
Furthermore, the ESP8266EX offers a high level of on-chip integration. It integrates the
antenna switch, RF balun, power amplifier, low-noise receive amplifier, filters, and power
management modules. It requires minimal external circuitry, and the entire solution,
including the front-end module, is designed to occupy minimal PCB space.
The ESP8266EX also integrates an enhanced version of the 32-bit processor of Tensilica's
L106 Diamond series, with on-chip SRAM. The ESP8266EX is often integrated with
external sensors and other application-specific devices through its GPIOs. The SDK files
provide examples of the software of the related applications.
The ESCP–Espressif Systems' Smart Connectivity Platform has many cutting-edge
advantages, including energy-efficient VoIP that can switch rapidly between sleep and
wake modes, adaptive radio bias for low-power operations, front-end signal processing
capacity, problem-shooting capacity, and the radio system co-existence feature to remove
cellular, bluetooth, DDR, LVDS and LCD interference.
The SDK based on the ESP8266EX IoT platform offers users a simple, high-speed and
efficient software platform for IoT device development. This programming guide provides an
overview of the SDK, as well as details of the APIs. The present document should be
particularly helpful to embedded software developers who use the ESP8266EX IoT platform
for software development.
Espressif

Introduction

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1. Introduction
2017.05