https://opengizmo.dev/blog ESP32 guides, board comparisons, and step-by-step build tutorials from OpenGizmo, written for makers who want to understand what they build. en-us Sat, 31 Oct 2026 09:30:44 GMT https://opengizmo.dev/images/logo/opengizmo-logo.png https://opengizmo.dev/blog https://opengizmo.dev/blog/how-to-build-a-crypto-ticker-with-esp32-and-max7219 https://opengizmo.dev/blog/how-to-build-a-crypto-ticker-with-esp32-and-max7219 Sun, 28 Jun 2026 00:00:00 GMT Learn how to build a crypto ticker with an ESP32 and MAX7219 LED matrix using WiFi market data, a scrolling display loop, and a browser-based setup flow. Builds Bruma https://opengizmo.dev/blog/control-reolink-nvr-esp32 https://opengizmo.dev/blog/control-reolink-nvr-esp32 Sat, 27 Jun 2026 00:00:00 GMT Learn how to control a Reolink NVR from an ESP32 using WiFi, HTTPS requests, a simple local interface, and a safe state-restore workflow. Builds Bruma https://opengizmo.dev/blog/what-is-a-microcontroller https://opengizmo.dev/blog/what-is-a-microcontroller Sat, 27 Jun 2026 00:00:00 GMT A microcontroller is a small chip that combines a CPU, memory, and programmable I/O pins, built to run firmware and control hardware directly. Guides Bruma https://opengizmo.dev/blog/arduino-ide-vs-platformio-for-esp32 https://opengizmo.dev/blog/arduino-ide-vs-platformio-for-esp32 Thu, 25 Jun 2026 00:00:00 GMT Arduino IDE is fine for a first sketch, but PlatformIO is usually the better choice for ESP32 projects: cleaner structure, pinned libraries, and real workflows. Guides Bruma https://opengizmo.dev/blog/esp32-vs-esp8266 https://opengizmo.dev/blog/esp32-vs-esp8266 Thu, 25 Jun 2026 00:00:00 GMT ESP32 and ESP8266 are both cheap WiFi microcontrollers, but the ESP32 usually wins when you need more performance, Bluetooth, or more flexible hardware. Guides Bruma https://opengizmo.dev/blog/what-is-the-esp32 https://opengizmo.dev/blog/what-is-the-esp32 Thu, 25 Jun 2026 00:00:00 GMT The ESP32 is a low-cost microcontroller from Espressif that combines WiFi, Bluetooth, GPIO, and enough processing power to build practical connected devices. Guides Bruma https://opengizmo.dev/blog/what-is-opengizmo https://opengizmo.dev/blog/what-is-opengizmo Wed, 17 Jun 2026 00:00:00 GMT OpenGizmo is an ESP32-focused site for practical open-source gadgets, build pages, and maker notes that explain how the devices actually work. Guides Bruma