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Notes, IoT builds, PCB files, and free resources — four modules in orbit around one signal bus.

boot// notes.index() → 46 articles, last write September 8, 2026
SIGNAL BUS
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Featured build

updates daily from selected articles
Bộ điều nhiệt thông minh tự làm được điều chỉnh trong một căn hộ Việt Nam
Deployed
Today's featured build

A smart thermostat that learns how your room warms up

Notes on building an ESP32 smart thermostat that learns a room's heating rate, starts at the right time, and keeps safety control local.

IoT Solutions · August 26, 2026
22.4°C

Room temperature · local control

Learning curveDay 12 / 21
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Signal feed

8 items

5G IoT with ESP32: Connect NB-IoT & LTE-M from Modem to MQTT

A practical ESP32 guide to integrating an NB-IoT/LTE-M modem: choose the network, power it safely, wire UART, use TinyGSM and send first telemetry.

FirmwareSeptember 8, 2026

Real-Time Operating System (RTOS): FreeRTOS on ESP32

A beginner-friendly guide to using FreeRTOS on ESP32 for multitasking firmware with tasks, queues, notifications, mutexes, and practical debugging habits.

FirmwareSeptember 8, 2026

mmWave Gesture Recognition with AI – Part 2: From Radar Frames to Edge ML

Build a practical mmWave radar gesture classifier: choose usable radar data, collect a balanced dataset, train a compact model, and deploy confidence-gated inference.

DeployedSeptember 8, 2026

OpenMQTTGateway: Building a Multi-Protocol Smart Home Hub

Set up an OpenMQTTGateway hub for BLE, Wi-Fi, RF, and LoRa sensors, then route the data into MQTT and Home Assistant without building a separate bridge for every device.

DeployedSeptember 7, 2026

ESP32 GPIO Pin Mapper

Add sensors and modules, auto-assign free GPIO pins, catch pin conflicts, and export wiring table + Arduino code.

Hardware ReferencesSeptember 2, 2026

ESP32 Pinout Diagram & Comparison Tool

Interactive ESP32 / ESP32-S3 / ESP32-C3 pinout diagrams with GPIO functions, strapping-pin warnings, and side-by-side board comparison.

Hardware ReferencesAugust 31, 2026

Pika GIF Emoji Set for Mochi Robot – 21 Expressions (360x240)

GIF Pika emoji set includes 21 animated expressions, sized 360x240. Suitable for Mochi Robot screen, robot face UI, AI companion, and other UI projects.

ZIPAugust 10, 2026

AQuality32 - Open-Source ESP32 Air Quality Monitoring Device

Open-source AQuality32 ESP32 PCB for battery-powered CO2, particulate matter, temperature, and humidity monitoring, validated in HardwareX.

Design FileJuly 31, 2026

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