is it possible to pair more the one Android device to one HC-05 Bluetooth shield?
I'm trying to have two or more devices controlling the arduino at the same time.
Thanks in advance
Most if not all bluetooth modules are one to one. So if you want to have multiple devices control a single arduino, then you will need to switch between them very fast. However this will mean briefly resetting the bluetooth module and pair it to the wanted device.
I think its possible but I have never heard of it done with Arduino. Our Hyundai can automatically pair with six devices. I assume it does this by rapid polling as Hazard suggests. I understand it has a pecking order, i.e. phone trumps iPod
Interesting question. I thought about it myself once and thought it was not possible with my serial bt slave. But I bet more advanced bt slaves may handle more masters. Keep me posted.
Thanks you for all the answers.
Do you know if ill be able to stack two or more Bluetooth shield on one arduino?
Haha! I forgot to say that the car might have six modules. They would cost less than a dollar bought by the cubic metre, and the consumer would never know the difference.
I'm sure you could have more than one module on an arduino. If/when you run out of hardware serial ports, you can use software serial. Arduino doesn't know or care what the serial device actually is. It is just talking to pins.
However, I think you still only get one conversation at a time, and you are just moving the problem rather than solving it.
Phillipe Cantin's auto-connect stuff may have the key to a single bluetooth polling many.
Can I connect the paired master and slave HC - 05 with an Android device..?
It sounds like a nonsense question. If you mean a three-way conenction, no.
Nick_Pyner:
It sounds like a nonsense question. If you mean a three-way connection, no.
How is it a nonsense question? There are lots of people asking it if you do a google search. I came across this because I also want to know. I'd like to have my PC paired with my robot and also be able to pair my android with the bot. That allows data logging and control from the PC as well as the phone when up and moving around.
From what I have read, a master can have 7 slave connections, though the HC05 doesn't support this. I'm looking for info on a BT module that does support it and if a PC and phone can be slaves. The alternative seems to be to add a second BT module for the second connection.
A lot of people are unable to ask a sensible question - a matter of literacy rather than expertise. I note that it wasn't you who was asking the question, and it sounds like you have already answered your own - however irrelevant it was to this thread. The HC-05 is a plain-vanilla SPP device and indeed works as bluetooth was intended - one with one. You may find a Bluetooth LE device is OK for what you want, and that may be what you were googling. As you suggest, a second HC-05 module is also just fine. It is also possible to configure a single master HC-05 to talk to several slaves in sequence, but I don't know how easy it would be to work this way with a PC.
Nick_Pyner:
A lot of people are unable to ask a sensible question - a matter of literacy rather than expertise. I note that it wasn't you who was asking the question, and it sounds like you have already answered your own - however irrelevant it was to this thread. The HC-05 is a plain-vanilla SPP device and indeed works as bluetooth was intended - one with one. You may find a Bluetooth LE device is OK for what you want, and that may be what you were googling. As you suggest, a second HC-05 module is also just fine. It is also possible to configure a single master HC-05 to talk to several slaves in sequence, but I don't know how easy it would be to work this way with a PC.
Reading through this again it looks like your, "nonsense" reply may have been to Ajith124 and not the OP. Since you didn't quote, it wasn't immediately obvious. If so, I retract that response and apologize.
But, how was my question, "irrelevant to this thread"? The only difference between the OP's question and mine was he wants 2 androids connected to his controller and I want an android and a PC.
Back to the OP's and my question, there is Multipoint Bluetooth, which I believe is exactly what we want, but I don't think it has found its way to our market as a module yet. It's used in devices like hands free cell phone speakers and can pair with more than one phone at once, switching to the one that is making or receiving a call at the time or play music between calls.
For the near future anyway I think we will have to settle for multiple HC05/06 or BLE modules. It's not really any different than the controllers with multiple hardware serial ports. We will just have to double up on the reads and writes
I wouldn't bother responding to OP's post in 2013, I did that in reply #2. As I said then, one of our cars has multi-point Bluetooth. I still don't know how it works, but I know it isn't BLE. I believe the accessory Bluetooth in the Ford is Bluetooth V2.1+EDR. The EDR may be the vital bit that HC-05 doesn't have, but what you need. The OP's Headline - one HC-05<> multiple Androids, making it more an Android problem than Arduino. In your case, tha Android is probably the least of your problems. If you use BLE, I suspect it does not need to be multiple. You might find some useful information on the Martyn Currey website.
Nick_Pyner:
I wouldn't bother responding to OP's post in 2013, I did that in reply #2. As I said then, one of our cars has multi-point Bluetooth. I still don't know how it works, but I know it isn't BLE. I believe the accessory Bluetooth in the Ford is Bluetooth V2.1+EDR. The EDR may be the vital bit that HC-05 doesn't have, but what you need. The OP's Headline - one HC-05<> multiple Androids, making it more an Android problem than Arduino. In your case, tha Android is probably the least of your problems. If you use BLE, I suspect it does not need to be multiple. You might find some useful information on the Martyn Currey website.
Thank you