Bluetooth Connectivity
Jeremy Blum · 2019
Variants of Bluetooth technology are used in headsets, keyboards, mice, computers, smartphones, location beacons, and more. Bluetooth, by design, is actually implemented differently from device to device, which is part of what often generates confusion when saying that something supports Bluetooth. Bluetooth profiles are like BTLE GATT web services—they are different means of communicating over the same physical link. The chapter utilizes the Feather 32U4 Bluefruit LE board from Adafruit. Search the iPhone App Store or the Android Play Store for Adafruit Bluefruit LE Connect and install it on engineers' smartphone. The Bluefruit app provided by Adafruit has a UART mode that allows engineers to easily send text commands to a connected BTLE module. The goal is to pick a number that roughly represents the turn-on distance for engineers' lamp controller. Bluetooth comprises different versions and operating modes that all leverage 2.4 GHz wireless communication channels.