Bluetooth interfacing help

Projects Networking, Protocols, and Devices
1

Hi, I have an arduino uno and wish for it to control my phone using bluetooth. Ex. When it is detected by the arduino, lock my phone. I have a few questions,

  1. What is the best shield to buy for this?
  2. What is involved in programming it? (Or is there source code?)
  3. Is this actually possible? (If not is there another way?)

Thanks, Cody

2

Note order
3. Probably not. First look for a phone app that locks the phone on receipt of bluetooth signal. The rest is easy.
2. Very little. I doubt that you need an Arduino, just a power supply for bluetooth.

  1. Depends on the phone. A BT4 module should work with IOS and Android.
3

About the second part, so just give power to the module you described and it already starts to emit a signal that a phone can connect to?
@Nick_Pyner

4

Yes, the aforementioned phone app simply sniffs for the relevant bluetooth and does whatever it is you want to do, i.e. the action is in response to a successful connection, no data exchange needed.