Overview

This book is a practical guide to building complete, reliable IoT devices with MicroPython. It focuses on real hardware, real networks, and real failure conditions. The goal is to help you move beyond short scripts and prototypes and start building devices that run continuously, recover from errors, and remain maintainable after deployment. Many MicroPython resources focus on isolated features. This book focuses on systems. You learn how individual parts fit together and how design decisions affect stability, power usage, and long term behavior. Every chapter is written with deployment in mind. The Raspberry Pi Pico W is used as the primary reference platform. It provides Wi Fi, BLE, and strong MicroPython support. The techniques and patterns apply to other MicroPython boards with minor adjustments. What you will learn You will learn how to design and implement MicroPython based IoT systems from first principles to production ready projects. The book teaches you how to: Understand how MicroPython runs on constrained hardware Work confidently with GPIO, ADC, I2C, SPI, and UART Structure MicroPython projects for clarity and reuse Build reliable Wi Fi clients and servers Exchange data using HTTP and raw sockets Design and implement BLE services and characteristics Control devices from mobile applications Combine Wi Fi and BLE in a single device Apply event driven design and state management Reduce power consumption using sleep and duty cycles Handle network failures without crashing Use watchdogs and recovery strategies Manage configuration safely across updates Implement logging and diagnostics for deployed devices Troubleshoot devices in the field Prepare devices for long term, unattended operation What is inside the book The content is organized to build skill progressively. You will find: Clear explanations of embedded concepts using simple language Practical design patterns for MicroPython systems Fully working code examples tested on real hardware Complete end to end IoT projects Deployment and maintenance guidance Appendices with hardware references, APIs, examples, and checklists Each code example exists to support a real use case. There is no filler. Hands on projects included The book includes full projects that integrate multiple concepts. You will build: A Wi Fi environmental monitoring device A BLE controlled device A persistent sensor data logger A network enabled actuator A combined Wi Fi and BLE device with local provisioning These projects reflect common commercial and industrial designs. Who this book is for This book is written for readers who want dependable results. It is for you if: You know basic Python and want to build hardware projects You are frustrated by examples that fail after a short time You want to deploy IoT devices outside a lab environment You care about reliability, power usage, and recovery You want to understand systems, not shortcuts Why this book matters IoT devices live in unpredictable environments. They fail in ways desktop software does not. This book teaches you how to anticipate those failures and design around them.

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