Bluetooth Connectivity

Parts List

• Adafruit Feather 32u4 Bluefruit LE (pre-soldered)
• USB cable (Type A to Micro-B)
• Half-size or full-size breadboard
• Assorted jumper wires
• 220Ω resistor
• 10kΩ trim potentiometer (or another analog sensor of your choice)
• 5mm red LED
• 5V 1A USB port wall power supply
• Controllable power relay module (IoT Power Relay from Digital Loggers, Inc.)
• AC lamp
• Pocket screwdriver
• BTLE-capable smartphone (iPhone or Android)

Code

Download Code (2nd Edition, Chapter 16)
(Also available on GitHub)

Useful Links

• List of the BTLE GATT services predefined by the Bluetooth SIG
• Adafruit Feather board Windows Drivers
• Adding Adafruit board the Arduino IDE
• Official Adafruit Feather 32u4 Bluefruit LE Tutorial
• Adafruit BTLE smartphone app source code
• Adafruit Bluefruit LE Connect App for iPhone
• Adafruit Bluefruit LE Connect App for Android

Videos

Watch a demo video of the “BTLE Sensor Visualization” project from this chapter:

Watch a demo video of the “BTLE UART LED Control” project from this chapter:

Watch a demo video of the “BTLE Proximity AC Lamp Control” project from this chapter: