Book Image

ESP8266 Internet of Things Cookbook

By : Marco Schwartz
Book Image

ESP8266 Internet of Things Cookbook

By: Marco Schwartz

Overview of this book

The ESP8266 Wi-Fi Module is a self contained System on Chip (SOC) with an integrated TCP/IP protocol stack and can give any microcontroller access to your Wi-Fi network. It is capable of either hosting an application or offloading all Wi-Fi networking functions from another application processor. This book contains practical recipes that will help you master all ESP8266 functionalities. You will start by configuring and customizing the chip in line with your requirements. Then you will focus on core topics such as on-board processing, sensors, GPIOs, programming, networking, integration with external components, and so on. We will also teach you how to leverage Arduino using the ESP8266 and you'll learn about its libraries, file system, OTA updates, and so on. The book also provide recipes on web servers, testing, connecting with the cloud, and troubleshooting techniques. Programming aspects include MicroPython and how to leverage it to get started with the ESP8266. Towards the end, we will use these concepts and create an interesting project (IOT). By the end of the book, readers will be proficient enough to use the ESP8266 board efficiently.
Table of Contents (15 chapters)
ESP8266 Internet of Things Cookbook
About the Author
About the Reviewer
Customer Feedback

Troubleshooting basic ESP8266 issues

You may run into some issues when using the ESP8266's basic functions. We will list some of the common problems that many people face and some ways of troubleshooting them.

The analog pin cannot measure high voltages

The analog pin of the ESP8266 can only measure voltages between 0V and 1V. If you have a sensor that outputs an analog signal that goes above that range, you will need to divide it. Otherwise, most of your readings from the analog pin will be 1023.

The best way of dividing the voltage is by using a voltage divider. It is easy to implement, since all you need is two resistors of the desired value and you are good to go.

Since most of the analog sensors you use with the ESP8266 board will output a signal of voltages between 0V and 3.3V, you will need a 1200 Ω resistor (R1) and a 470 Ω resistor (R2) to build a voltage divider.

You can read more on voltage dividers at this link:

The board stops...