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