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ESP32

Everything tagged “ESP32” across notes, resources, and Mochi logs.

Bộ điều nhiệt thông minh tự làm được điều chỉnh trong một căn hộ Việt Nam
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IoT SolutionsIoT Solutions

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 SolutionsESP32ESPHomeHome AssistantSmart Thermostat
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A maker tests an unbranded millimeter-wave radar module connected to an ESP32 on an electronics workbench
New
IoT SolutionsIoT Solutions

mmWave Radar: Motion, Gesture, and Presence Detection

Practical notes on separating motion, gesture, and presence detection, choosing the right mmWave radar module, and building an ESP32 prototype that is easy to tune.

IoT SolutionsESP32mmWave RadarPresence DetectionGesture Control
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ESP32 sensor prototype and smartphone being tested over Bluetooth Low Energy on an electronics workbench
IoT SolutionsIoT Solutions

Deep Dive: BLE Communication for IoT Devices

A practical guide to reliable BLE communication for IoT devices, covering GATT, packets, MTU, notifications, reconnection, security, and power with ESP32 NimBLE.

IoT SolutionsBluetooth Low EnergyBLEESP32NimBLEGATTFirmware
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Engineer reviewing the network and firmware security of an ESP32 development board on a workbench
IoT SolutionsIoT Solutions

IoT Security Trend: A Practical Baseline for Connected Devices

A practical IoT security guide for ESP32 and connected devices, from threat modeling and unique identity to Secure Boot, signed OTA, protected storage, and testing.

IoT SolutionsIoT SecurityCybersecurityESP32Secure BootOTAFirmware
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A hand reviewing a sleep environment score on a camera-free DIY bedside clock in the morning
IoT SolutionsIoT Solutions

A camera-free desk clock that indicates sleep quality

Notes for an ESP32 bedside clock that uses CO2, temperature, light, and bed presence to explain why a night felt off, without putting a camera in the bedroom.

IoT SolutionsESP32ESPHomeHome AssistantSleep EnvironmentPrivacy
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DIY ESP32 fridge and freezer temperature alert device mounted beside a refrigerator during a power outage
IoT SolutionsIoT Solutions

A fridge and freezer temperature alert device for power outages

Notes for a small ESP32 box with two DS18B20 probes and Home Assistant alerts, meant to catch a warming fridge or freezer after a power outage.

IoT SolutionsESP32ESPHomeHome AssistantDS18B20Smart Home
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Màn hình HMI LCD gắn cạnh tủ lạnh hiển thị thực đơn và các món sắp hết hạn trong bếp
IoT SolutionsIoT Solutions

A kitchen HMI near the fridge for meals and expiring food

Notes for a small LCD/TFT HMI mounted near the fridge, using Home Assistant to show meal plans, expiring food, and quick shopping-list actions.

IoT SolutionsHMILCDTFTESP32Home AssistantLVGLSmart HomeGrocy
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Annotated PCB view comparing narrow signal traces with a wider power trace
NotesPCB Design

Net Classes and Trace Width: When Should a PCB Trace Be Wider?

A practical guide to PCB net classes and trace width for small boards: signal traces, 3V3, 5V, battery paths, ground, power vias, and a pre-Gerber checklist.

PCB DesignHardwareESP32Power DesignKiCad
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Original diagram showing a signal trace and its compact return path over a continuous ground plane
NotesPCB Design

PCB Ground Planes: GND Is More Than a Net Name

A practical guide to PCB ground planes, return current, GND layout mistakes, stitching vias, decoupling paths, and copper pour checks.

PCB DesignHardwareESP32Power DesignKiCad
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Close-up of SMD capacitors and resistors on a printed circuit board
NotesPCB Design

Choosing Capacitors for Electronics: Simple Part, Easy Mistake

A beginner guide to choosing capacitors for circuits: capacitance, voltage rating, decoupling, ceramic types, DC bias, and ESP32 values.

PCB DesignHardwareCapacitorsPower DesignESP32
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Real ESP32 display prototype running an LVGL interface during development
NotesEmbedded UI

Displaying Expressive GIFs on ESP32 with LVGL

A practical guide to animated GIF expressions in ESP32 firmware: convert assets, enable LV_USE_GIF, store files, and render with lv_gif.

Embedded UIFirmwareLVGLESP32
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A small round display showing an expressive face, surrounded by GIF, PNG, JPG, and C array format badges
NotesEmbedded UI

GIF, PNG, JPG, or a C Array: Which Image Format Fits Your ESP32 Screen?

Compare GIF, PNG, JPG, and C array images for ESP32 displays by flash use, RAM use, decode speed, alpha, animation, and quality.

Embedded UIFirmwareLVGLESP32
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ESP32-S3 reference schematic divided into functional blocks for review
NotesPCB Design

Reading an Open-Source ESP32 Schematic Before Reusing It

An ESP32 TouchDown case study for reviewing an open-source schematic before reuse, covering power, reset, boot, USB, connectors, and tests.

PCB DesignHardwareESP32Open Source
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