Question about activating bluetooth by phone?

Ok, guys, just hear me out -- this may or may not be possible, I just need to know what parts I would need for the bluetooth section. Here's my ambition: I want to modify a simple alarm clock so that whenever my android phone receives a text message or phone call, it sets off the alarm clock. I'm almost certain I'll be able to write an app for the phone to send out a bluetooth signal whenever I receive a call or text message, I just need to know what parts I'll have to have for the alarm clock. I'm assuming it's some sort of receiver that I would have to wire into the clock. Just let me know what you guys think. I know it sounds stupid and I'm sure there are much better ways to do things but I want to go this route if at all possible. Thanks!

bwrussell4 years ago
You could do this easy with a cheap Bluetooth module, an arduino, and a piezoelectric buzzer. I've had good luck with THIS BT module, it's cheap and easy to use. Wire the module and the buzzer to the arduino, make an app or use something like Tasker to send a signal from your phone and when the arduino recieves the signal it will trigger the buzzer. Depending on which buzzer you pick-up you may need a transistor or relay to trigger a more powerful power source. Throw it all in a enclosure and you're good to go.

If it has to be in the alarm clock you can rewire the alarm through a transistor or relay that's controlled by the arduino.
gtgm_110 (author) 4 years ago
Thank you! That helped a lot! Thanks to the other two answers as well.
iceng4 years ago
I keep my phone next to me and it lets me know just fine.

I could purchase a Bluetooth ear peace too.
Sounds like you have a steep learning curve ahead of you.

Why an alarm clock? Why not wire a blue tooth receiver to a micro controller that can set off an alarm or trigger an audio device to play the MP3 of your choice? It would probably be easier to use an Arduino with Bluetooth shield and a wave shield. You can get the ArduinoBT which has bluetooth built into it.