The ESP8266 is a
low-cost Wi-Fi chip with full TCP/IP stack and MCU (Micro Controller Unit) capability produced by Shanghai-based
Chinese manufacturer, Espressif
Systems.
The
chip first came to the attention of western makers in
August 2014 with the ESP-01 module, made by a third-party manufacturer,
AI-Thinker. This small module allows microcontrollers to connect to a Wi-Fi
network and make simple TCP/IP connections using Hayes-style commands. However, at the time
there was almost no English-language documentation on the chip and the commands
it accepted. The very low price and the fact that there were very few external
components on the module which suggests that it could eventually be very
inexpensive in volume, attracted many hackers to explore the module, chip, and
the software on it, as well as to translate the Chinese documentation.
The ESP8285 is an
ESP8266 with 1 MB of built-in flash, allowing for single-chip devices capable
of connecting to Wi-Fi.
This is the datasheet of ESP 8266 with Arduino;
This is one of the video for the beginner of ESP 8266 WiFi Module.
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