Posts

All the articles I've posted.

• ESP32 Development Notes: Async HTTP, GIF Playback, and Resource OTA

  Published: 21 Sep, 2022 |  at  06:45 AM

  Four ESP32 development notes: asynchronous HTTP, keeping PWM active during light sleep, GIF playback, and OTA updates for SPIFFS resources.

• ESP32 LCD Performance: Parallel Interface versus SPI

  Updated: 29 Nov, 2025 |  at  10:46 AM

  Comparing 60 MHz SPI and 8-bit parallel LCD performance on ESP32 using TFT_eSPI and LVGL to examine rendering and bus throughput limits.

• Variable Fonts in LVGL, Part 3: Loading Fonts and Managing Memory on ESP32

  Published: 3 Jan, 2022 |  at  08:40 PM

  Loading variable fonts on ESP32 with FreeType and LVGL, configuring PlatformIO libraries, and managing memory with LV_FREETYPE_SBIT_CACHE.

• Variable Fonts in LVGL, Part 2: Porting FreeType to ESP32

  Published: 19 Dec, 2021 |  at  05:47 AM

  Moving an LVGL variable-font demo from a desktop simulator to ESP32, configuring FreeType, and driving an ST7789 display with dynamic font weights.

• Variable Fonts in LVGL, Part 1: Getting Started with FreeType

  Published: 13 Dec, 2021 |  at  01:09 AM

  Getting started with variable fonts and dynamic font weights in LVGL using FreeType, with MIUI and Material You as examples of the effect.

• Building the Stack Overflow Three-Key Macro Keyboard with ATmega32U4

  Updated: 19 Dec, 2025 |  at  04:10 AM

  Recreating Stack Overflow's April Fools' three-key macro keyboard with ATmega32U4 USB HID, a KiCad PCB, and Arduino keyboard shortcuts.

• Displaying a Remote JPG Image on ESP32 over HTTP

  Updated: 25 Nov, 2025 |  at  08:07 AM

  Displaying remote JPG images on ESP32 over HTTP, with AsyncTCP chunk handling, Content-Length parsing, and onData callbacks.

• Streaming a PC Screen to an ESP32 Display

  Updated: 27 Nov, 2025 |  at  05:40 PM

  Streaming PC frames to ESP32 using Python MSS capture, OpenCV JPEG encoding, a custom TCP protocol, and TFT_eSPI with DMA display rendering.

• Building a Real-Life CS:GO StatTrak Counter

  Updated: 18 Jan, 2026 |  at  08:00 AM

  Building a physical CS:GO StatTrak counter, from OLED and MAX7219 display experiments to an HDSP2072 display, ATmega32U4 board, and custom enclosure.

• Building a Tiny Desktop Pixel Display

  Updated: 29 Nov, 2025 |  at  06:52 PM

  Building a tiny desktop pixel display with a custom WS2812 2020 LED board, AWatrix-based firmware, a diffuser, and a WeMos D1 mini.

• Adding a Light Switch to HomeKit, Part 2: Servo Control and Integration

  Updated: 28 Jun, 2026 |  at  08:50 PM

  Combining an ESP32 HomeKit LED demo with MCPWM servo control to operate a physical light switch through Siri without modifying its wiring.

• Adding a Light Switch to HomeKit, Part 1: The LED Demo

  Published: 11 May, 2020 |  at  01:03 AM

  Setting up ESP32 HomeKit development in Windows WSL, building and flashing esp-homekit-demo, and accessing a serial device through ttyS3.

• Recovering an Unresponsive Arduino Pro Micro or Leonardo through the Bootloader

  Updated: 18 Jan, 2026 |  at  08:00 AM

  Recovering a Pro Micro that disconnects or is not detected, investigating SoftwareSerial conflicts, and entering the bootloader by resetting RST and GND twice.

• Training Your Own YOLO-Tiny Object Detection Model

  Published: 17 Jun, 2019 |  at  06:25 AM

  Training a YOLO-Tiny object detection model with Keras-YOLO3 and Python, including CFG filter counts, weight conversion, and train.py configuration.

• Building FFmpeg for Android with the NDK

  Published: 4 Feb, 2018 |  at  05:01 AM

  Building FFmpeg shared libraries with the Android NDK, comparing decoding options, and troubleshooting version names and MinGW/MSYS cross-compilation.