Nick_Pyner:
I'm sure you could do it with bare bluetooth.
You mean just a simple bluetooth module like an Hm-10 or Hm-06 (I have them here...).
How would it then be possible to do this?
Nick_Pyner:
Another thing you need to be careful about is re-inventing the wheel. It's the sort of thing that would be a lot cheaper to buy than make.
Thats what I thought too and why I was thinking about buying some sort of wireless handheld transmitter but they are not as cheap as I thought. Further, I am supposed to experiment and actually try these things by myself.
mauried:
How many people will using the system, and will they all be pushing the buttons at the same time?
If so, you will need to handle the issue of data loss caused by multiple transmissions .
At first its supposed to be just two or three at the same time, but for sure I have been thinking about this too. My first idea was to have the main Arduino (the receiving one) ask the handheld transmitters to send there data, thus only one signal is being sent at a time - could that work?
And is there any other cheaper and smaller microcontroller than the Arduino nano I could use?
Thanks for all the replies.