Hackster.io
Hackster.io
Community platform where engineers and hobbyists publish connected-device build logs with wiring diagrams, source code and parts lists spanning ESP32, Raspberry Pi, Arduino and major cloud services. Useful for seeing how complete projects are assembled end to end.
More resources on IoT Applications
Adafruit Learn Guides
Adafruit's free library of thousands of step-by-step electronics tutorials covering microcontrollers, sensors, motors, servos and CircuitPython. Each guide includes wiring diagrams and code, so learners can assemble, wire and program working robot and maker hardware projects.
Designing Connected Products: UX for the Consumer Internet of Things
A 700-page treatment of designing connected consumer systems, covering interusability across device and companion app, network latency and offline failure states, onboarding and pairing, data and device models, service design, and conventions for interfaces spread across multiple screens.
Andreas Spiess (YouTube channel)
Swiss engineer's channel documenting sensor, ESP32, gateway and LoRaWAN builds with bench measurement rather than assertion: battery current draw, radio range, antenna behavior and module comparisons are tested, and failed approaches are shown alongside the reworked ones.
Node-RED Documentation
Official documentation for the flow-based tool used to wire devices, brokers, APIs and databases together in production connected-device systems, including the user guide, step-by-step tutorials, a cookbook of task recipes, and instructions for authoring custom nodes. The fastest honest path from 'I understand MQTT' to a working deployed application - ingest sensor data, transform it, route it to storage and dashboards. The cookbook is the load-bearing part: concrete recipes rather than concept prose.
AWS Well-Architected Framework: IoT Lens
Whitepaper applying operational excellence, security, reliability, performance and cost pillars to connected-device workloads, covering device provisioning and identity, fleet management, over-the-air updates, edge versus cloud processing, telemetry ingestion, and secure decommissioning across consumer, commercial and industrial fleets.
Building the Internet of Things
Cisco strategy executive Maciej Kranz makes the business case for industrial IoT adoption, using deployment examples from manufacturing, energy, and transportation. Readers come away understanding how to scope a first IoT project and the organizational obstacles involved.