Developers run into tight RAM, fragile Wi-Fi, and brittle updates when small devices meet real homes. This book gives you a practical workflow to choose the right ESP boards, keep heaps stable, and move code into flash so your nodes stay responsive.

You will set up a lean toolchain, flash clean images, and structure Lua the way production devices need it, from sensor reads to secure messaging and Home Assistant integration.

Pick ESP8266, ESP32 C3, S3, or C6 with clear RAM, flash, radio, and power tradeoffs
Install Python tools, drivers, esptool, and a dependable serial console on any OS
Build tight NodeMCU firmware, prune modules, and use LFS to keep code in flash
Understand GC behavior, configure pause and step multipliers, and prevent heap spikes
Use tmr, file, node, wifi, net, mqtt, tls, sjson for stable event driven code
Choose SPIFFS or LittleFS wisely, migrate safely, and avoid wear issues
Stage boot flow with init.lua, safe mode, and staged startup loaders
Perform Lua OTA with HTTP pull, verify images, and implement clean rollback
Configure Wi-Fi profiles with static IP and BSSID for fast reconnect after sleep
Stream sockets and HTTP without big buffers, size TLS records, handle certs
Design MQTT lifecycles with keepalive, LWT, retain strategy, and backoff
Integrate with Home Assistant using MQTT Discovery topics and payload templates
Wire DS18B20, BME280, SHT3x, relays, MOSFETs, and PWM dimmers with robust retries and safety
Handle analog inputs on ESP chips, avoid reference pitfalls, and validate readings
Plan deep sleep, wake sources, static IP, and BSSID cache for battery life
Budget power, measure real current, and estimate device life with a simple script
Secure traffic with TLS settings that fit in RAM, or apply PSK with rotation plans
Use ESP32 OTA partitions and rollback flow for firmware updates that recover
Provision unique credentials per device and expose a clear recovery mode
Troubleshoot heap and GC under TLS and JSON load, prevent brownouts and boot loops
Capture crashes and field logs, toggle safe mode with remote flags, and set guardrails
Know when NodeMCU is not the right tool and what alternatives to pick
Apply end to end tests from device to broker to Home Assistant dashboards

Includes field ready case studies, a production checklist, security review steps, update playbooks, and rollback drills you can run on the bench before you ship.

This is a code heavy guide with working Lua snippets, esptool commands, and MQTT payloads you can paste, adapt, and deploy to real devices.

Grab your copy today.

"Synopsis" may belong to another edition of this title.

PBShop.store UK

Fairford, GLOS, United Kingdom

5-star seller

AbeBooks seller since June 11, 1999

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Item	10 to 20 business days	10 to 20 business days
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Lua for Embedded Systems and Iot Devices

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Synopsis