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The $20 Smart Home: Build an AI Video Doorbell with the ESP32-CAM - Live Video, Face Recognition, Two-Way Audio, and Home Assistant Integration with N
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General ComputersGeneral Construction & RenovationSecurity
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ISBN13: 9798188522964
Publisher: Independently Published
Published: Jul 22 2026
Pages: 124
Weight: 0.67
Height: 0.26 Width: 8.50 Depth: 11.00
Language: English
Publisher: Independently Published
Published: Jul 22 2026
Pages: 124
Weight: 0.67
Height: 0.26 Width: 8.50 Depth: 11.00
Language: English
Somewhere on your street right now, a doorbell camera is uploading video of a delivery driver to a data center hundreds of miles away - and the homeowner pays monthly for the privilege. Stop paying. Start building. Across 15 hands-on chapters, you'll build a complete AI video doorbell around a $7 camera board and about $13 more in parts - every component itemized, every assumption stated out loud. Your doorbell will:
And every frame of video, every faceprint, every byte stays inside your house. That's not a feature tier - it's the architecture. This is not a copy-paste tutorial. All 40+ code listings are explained line by line and tested against the current toolchain (versions pinned in print - no dead APIs, no this compiled in 2019 archaeology). Every wiring decision is justified against the board's real constraints, including the pin conflicts, boot-mode traps, and power gremlins that kill most camera-board projects. Honest limitations are stated before you hit them, safety protocols are taught where they matter, and a free companion download provides every line of source code, organized by chapter. Inside you'll learn:
- non-blocking firmware patterns and dual-core architecture
- camera drivers and streaming servers
- soldering and weatherproofing that lasts
- digital audio on a shared bus
- how neural networks actually see, and how to budget them into kilobytes
- enrollment, thresholds, and biometric privacy done respectfully
- home automation that speaks your visitors' names
- deep sleep and solar power arithmetic
- a real threat model, and security proportionate to it
- and the upgrade path to newer silicon.
Who it's for: makers, tinkerers, developers curious about embedded systems and edge AI, smart-home enthusiasts who want cameras that answer to them - anyone who can read code with guidance, follow connect this pin to that pin, and spend one evening learning to solder. You'll finish with a working doorbell on your front door - and with the embedded-systems, networking, AI, and security skills to build whatever comes next. The parts are the tuition. The builder is the product.
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