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Lua for Embedded Systems and Iot Devices: Build Firmware, Sensor Networks, and Home Automation with Nodemcu, Esp32, and Resource-Constrained Microcont
Paperback
Publisher: Independently Published
Published: Nov 9 2025
Pages: 262
Weight: 1.01
Height: 0.55 Width: 7.00 Depth: 10.00
Language: English
Build reliable Lua firmware for ESP8266 and ESP32 that ships, updates, and runs for months without fuss.
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.
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