Espressif ESP8266 User Manual

4. ESP8266 Programming Basics
In this chapter, we will have a look at the building blocks of an Arduino sketch. This will help
you to understand and modify the Weather Station which we will build in the next chapter. If
you just want to get the WeatherStation running you can skip this chapter.
A. Preparation
In this chapter, we will work with exercises which you can download from GitHub. They contain
several Arduino projects for the ESP8266. For an exercise open the related project in your
Arduino IDE and try to solve the given task. If you get stuck or want to see an alternative
solution open the project which ends with “_Solution”:
⚫ Exercise_04_01: contains the first exercise in chapter 4
⚫ Exercise_04_01_Solution: contains a possible solution
Now download the Zip file from GitHub and extract it in a place you will find it later. There is
a green “Clone or download” button which lets you download a Zip file:
https://github.com/squix78/esp8266-getting-started

Espressif ESP8266 Specifications

General

Digital I/O Pins	17
Analog Input Pins	1
Wi-Fi	802.11 b/g/n
Operating Voltage	3.0V - 3.6V
Clock Speed	80 MHz / 160 MHz
Operating Temperature	-40°C to 125°C
Dimensions	24mm x 14mm
Processor	Tensilica L106 32-bit micro controller