Quick Summary (TL;DR):In 2026, Arduino vs ESP32 is no longer a simple board-versus-board comparison. Arduino is an ecosystem spanning AVR, Renesas, ESP32-S3, STM32H7, Silicon Labs and other processors under a common IDE/API, while ESP32 is a large Espressif chip family…
Quick Summary (TL;DR):The Arduino Nicla Voice and ESP32-S3 can both run local voice AI, but they solve the problem in very different ways. Nicla Voice uses a dedicated Syntiant NDP120 neural processor alongside an nRF52832 Bluetooth MCU. The NDP120 is…
Quick Summary (TL;DR):Arduino’s wireless board range now covers several very different architectures, so “which Arduino has Wi-Fi?” is no longer the useful question. The UNO R4 WiFi keeps the familiar 5 V UNO ecosystem but uses a 48 MHz Renesas…
Quick Summary (TL;DR):The Arduino Nicla Vision and ESP32-S3-EYE are both compact 2 MP embedded-vision boards, but they are built for different styles of project. Nicla Vision combines a dual-core STM32H747, GC2145 camera, Wi-Fi/BLE, 6-axis IMU, time-of-flight distance sensor, MEMS microphone,…
Quick Summary (TL;DR):The Arduino Nicla Voice is a tiny always-on audio and sensor-AI board built around two very different processors. A u-blox ANNA-B112 module contains the Nordic nRF52832 Cortex-M4F microcontroller and provides Bluetooth Low Energy, while a dedicated Syntiant NDP120…
Quick Summary (TL;DR):The Arduino Nicla Vision is a 22.86 × 22.86 mm machine-vision board built around the dual-core STM32H747AII6, with a Cortex-M7 running up to 480 MHz and a Cortex-M4 up to 240 MHz. It combines a 2 MP GC2145…
Quick Summary (TL;DR):The Arduino Nicla Sense ME is a tiny 22.86 × 22.86 mm sensor node built around an ANNA-B112 module with an nRF52832 and a separate Bosch BHI260AP smart sensor hub. It exposes twelve Arduino-numbered I/O signals, including I2C,…
Connect Arduino Opta to Home Assistant over wired Ethernet and MQTT. Publish I1-I8 inputs, control relay outputs, use state/command topics, availability and Last Will, retained state, MQTT discovery, reconnect logic and safe industrial-control boundaries.
Arduino Opta Modbus RS485 guide: wire A(-), B(+) and GND correctly, add external termination where required, configure baud/parity, use Opta as a Modbus RTU client or server, understand register addressing and program it with ArduinoRS485, ArduinoModbus or PLC IDE.