Achim Pieters

The Ultimate Guide to the ESP8685-WROOM-03 Pinout

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The ESP8685-WROOM-03 is one of Espressif’s most compact and efficient wireless modules, combining Wi-Fi and Bluetooth 5 LE connectivity with a RISC-V single-core processor and rich peripherals — all in a module only 15 × 17.3 mm in size. It is designed for modern IoT applications that demand reliability, low power consumption, and flexible integration. Whether you’re a maker or a professional engineer, this guide […]

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The Complete Guide to the 1.28-Inch GC9A01 Round TFT Display Module

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Circular displays are a unique twist for DIY electronics projects. While most LCDs are square or rectangular, the 1.28-inch round TFT display gives your project a modern, smartwatch-like look. It’s based on the GC9A01 controller, offers a 240×240 full-color IPS panel, and connects over SPI. In this guide we’ll explore what it is, how to wire it, how to drive

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The Complete Guide to the HC-SR501 PIR Motion Sensor

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When it comes to detecting motion in DIY electronics, the HC-SR501 PIR sensor is one of the most popular and affordable choices. It’s used everywhere: alarm systems, automatic lights, smart home devices, and even art installations. In this guide we’ll cover how the sensor works, its specifications, wiring, configuration, and how to use it with

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The Complete Guide to the HLK-LD2410 24GHz Human Presence Radar Module

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If you’re building smart home systems, motion detection, lighting automation, or occupancy sensors, a radar module like the HLK-LD2410 offers a lot more than a standard PIR sensor. It can detect both moving and micro-movements (breathing, sitting still, slight motion), output distance estimates, provide configurable sensitivity, etc. In this guide we’ll go through what it is, how

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ESP32 Lifecycle Manager: Manage Your Firmware, Provisioning and Recovery in One Package

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ESP32-Lifecycle-Manager (LCM) is a smart “control tower” for your ESP32 device. At startup, LCM takes charge first: it handles network setup, update management, recovery procedures, and more — so your application can focus on its actual tasks. In this post, we’ll dive into how LCM works, how to integrate it, and why it’s a great

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