Hi all
I want to build a project, but would require a bluetooth shield that once it is paired, could supply an output
signal to the arduino to operate a relay,
Is this possible with all bluetooth shields or any particular bluetooth shields?
You are making things more complicated than they need to be. Use a bluetooth module to pass data to Arduino, which operates the relay. Any cheapo bluetooth SPP module can do this, like HC-05.
I want the bluetooth to transmit an audio signal to a pair of wireless headphones, but once there is a pairing another unit will be turned on via the arduino relay, is that possible?
First thing on a lighter note, you should learn How to ask question clearly.
Secondly, what I have learnt from your question is you wanna send a audio file via bluetooth and yeah its possible you should use bluetooth 4.0 modules for that purpose.
You can also turn ON a relay when your bluetooth will be paired as Arduino will know when its paired. You should be good at programming for completing this project but it's possible.
Thank you for your answer.
I thought I had enough detail in my question but will add all exact details when I ask something else.
I'm only new to this stuff and programming is what I'm struggling with at the moment, but want to get my head around it as I have a few ideas for projects.
would something like this do the job?
Decide what your projects functionality should be, before asking others for help. It's totally unclear what your goal is or what you are struggling with.
I have a dyno
When dyno is turned on I would like the arduino to turn on and operate a bluetooth transmitter
When I am sitting in the car about to be dyno'd, I would like to turn on the bluetooth headphones
Once paired to the bluetooth transmitter, I would like the arduino to know that they are paired and then switch a relay on, which will turn on the knock sensor equipment, which will allow the audio signal from the knock sensor equipment to the headphones and also a 0-5 volt trace to the dyno screen.
The knock sensor equipment in not arduino powered at all but would like it turn on via the relay.
When a dyno run is finished I would like to turn the headphones off and thus turning off the knock sensor equipment.
When I go to do another run, then I can turn them back on again and everything turns back on again, all without me having to get out of the car.
Turning it off betrween runs, will clear the highest peak values on the screen.
Having bluetooth headphones, means 1 less lead going into the car that can be tripped over or even mark the car or trim.
I wanted to know if there was a bluetooth arduino shield that this was possible with or is this possible with all of them?
was that enough information to get correct help?
If I've missed something can you actually point it out please?
So you have:
An audio signal, that you want to transmit via bluetooth to headphones
A relais, that should be switched on when the headphones are connected.
Is that correct?
Maybe a standard audio-bluetooth transmitter can do the first, while an arduino can analye one of the LEDs that indicate if headphones are connected and switch the relais accordingly.
yes that is pretty much correct