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.

About An Arduino library for connecting to Pixels Dice over Bluetooth Readme MIT license Activity ...

In Connecting to Intel® Edison from Android* with Bluetooth* LE (BLE) describes a way to access BT via Arduino code but additional BT shield/kit is required.

I have written the below code for an Arduino Nano 33 BLE, which is hooked up to an HX711 to read values from a load cell, and an LCD to output the current weight on the cell. Additionally, the weight ...

The $22 kit includes an Arduino-BLE board and 6-pin header that should be fairly broadly applicable for building Arduino-based hardware that can communicate with iOS devices.