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

Connecting sensors to your ESP8266 board

In this recipe, we are going to look at how to connect sensors to an ESP8266 board. There are two kinds of sensors that you will be using with your ESP8266: digital sensors and analog sensors.

The digital sensors output digital signals that you can read using the ESP8266 digital GPIO pins. The digital sensor outputs have only two states: high (logic 1) and low (logic 0). The high signals are ideally at a voltage level of 3.3V, while the low signals are at a voltage level of 0V.

Analog sensors output analog signals. The output comes in various voltage levels between 0V and 3.3V. The output signal is read using the ESP8266 analog pin (labeled ADC on our board).

It is advisable not to connect the analog sensor output directly to the ESP8266 analog pin. This is because the sensor output voltage range of 0V-3.3V is greater than the input voltage range of the analog pin, which is 0V-1V. The best way to connect an analog sensor to the analog pin is via a voltage...