It’s a method of controlling a camera shutter from a smartphone using Bluetooth. But the technique will work for any device which uses an infrared remote control. The video after the break shows ...

With a detachable Bluetooth remote, this tabletop tripod is good for selfies and vloggers, and doubles up as a (modest) ...

In this case, [AlxDroidDev] is using a feature that allows the camera shutter to ... handle the infrared remote control functions. SoftwareSerial is used to connect to the Bluetooth module.