Simple Alert Project using Bluetooth

We have this simple test project where in the objective to simply alert the person if its too dark(LDR). This is the diagram:

LDR ⬇

Audio File ➡ SD Card Module ➡ Arduino ➡ Bluetooth Module ➡ Bluetooth Headset

We already have: Arduino(clone) SD Card Module HC-05 Bluetooth Module (Master & Slave) Bluetooth Headset

We are done on the implementation of the LDR but we ran into problems implementing the Bluetooth part.

Any ideas and criticism are welcome! :) :)

Can you explain little more on the Bluetooth portion?
Are you having issues setting/configuring the bluetooth portion? or you got past that and having issues actually using it?

Yes. We've done the basic set-up but unfortunately we don't know how to "send" the audio to the bluetooth headset using the bluetooth module

we don't know how to "send" the audio to the bluetooth headset using the bluetooth module

That is because you can't. A HC-05 Bluetooth Module is not capable of running the audio mode of bluetooth.

Grumpy_Mike: That is because you can't. A HC-05 Bluetooth Module is not capable of running the audio mode of bluetooth.

Oh dang. Can you recommend what module should we use for that part?

Sorry don't know one.