Looking for practical Arduino projects? This guide shows how to control a relay from your smartphone using an Arduino Uno — either via Bluetooth or Wi-Fi.

Arduino Code Let's upload the corresponding sketch to send serial data between two SparkFun Thing Plus NORA-W306 boards wirelessly using the Bluetooth® Low Energy (BLE) feature. From the menu, select ...

The Bluetooth module wants 3.3v logic levels so that is taken into account. The image above shows a buffer chip doing the conversion, but the Fritzing schematic on the post uses a voltage divider.

Posted in Arduino Hacks Tagged android, app inventor, bluetooth, graphical, mit ← Quadcopter Brain Cracking Open A 24-port Switch So You Don’t Have To → ...

The Coin Arduino-BLE kit is designed to simply that by offering a pre-rolled solution, completely with open-source software that will go up on Github in December, which is when the boards should ship.

Primo will include Bluetooth LE (low energy), NFC, Wi-Fi, and infrared built-in — you typically need a “shield” add-on to get these features.

Arduino has introduced a Nano shaped board with a Wi-Fi and Bluetooth LE capable Espressif’s ESP32-S3 microcontroller, supporting it with the Arduino IDE and MicroPython. “Beginners can explore in an ...