You're reading from DIY Microcontroller Projects for Hobbyists The ultimate project-based guide to building real-world embedded applications in C and C++ programming

Product type Paperback

Published in Jul 2021

Publisher Packt

ISBN-13 9781800564138

Length 320 pages

Edition 1st Edition

Languages

Tools

ARM Cortex

Concepts

Microcontroller

Authors (2):

Miguel Angel Garcia-Ruiz

Pedro Cesar Santana Mancilla

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Table of Contents (16) Chapters

Preface

1. Chapter 1: Introduction to Microcontrollers and Microcontroller Boards

2. Chapter 2: Software Setup and C Programming for Microcontroller Boards FREE CHAPTER

3. Chapter 3: Turning an LED On or Off Using a Push Button

4. Chapter 4: Measuring the Amount of Light with a Photoresistor

5. Chapter 5: Humidity and Temperature Measurement

6. Chapter 6: Morse Code SOS Visual Alarm with a Bright LED

7. Chapter 7: Creating a Clap Switch

8. Chapter 8: Gas Sensor

9. Chapter 9: IoT Temperature-Logging System

10. Chapter 10: IoT Plant Pot Moisture Sensor

11. Chapter 11: IoT Solar Energy (Voltage) Measurement

12. Chapter 12: COVID-19 Digital Body Temperature Measurement (Thermometer)

13. Chapter 13: COVID-19 Social-Distancing Alert

14. Chapter 14: COVID-19 20-Second Hand Washing Timer

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Coding a program to send the sensed data to the internet

If you remember, in Chapter 9, IoT Temperature-Logging System, we found that an ESP-01 module was used because it integrates Wi-Fi communication through ESP8266. This module was programmed using AT commands through the STM32 Blue Pill microcontroller (where AT stands for Attention). As mentioned at the beginning of the chapter, we will use the NodeMCU development board, which is depicted in the following photo:

Figure 10.8 – NodeMCU development board

This board is also based on the ESP8266 microcontroller. However, unlike the SP-01 module, this can be programmed directly from its micro USB port using different development IDEs and various programming languages such as Lua and C. It also includes general-purpose input/output (GPIO) pins to be programmed according to the developer's needs. These characteristics make the NodeMCU microcontroller one of the most popular IoT platforms today...