For a school project, I bought a JY-MCU (master) bluetooth module for the Arduino. I connected it properly, and introduced a very basic code found on google. So the red LED blinks, but neither my smartphone nor my laptop achieve to detect the module. I tried several other configurations found on differents tutorials, but without success.
Do you have any idea why I am unable to detect the Bluetooth module ? Do you think it is related to the fact it is a master Bluetooth module ?
For a school project, I bought a JY-MCU (master) bluetooth module for the Arduino. I connected it properly, and introduced a very basic code found on google. So the red LED blinks, but neither my smartphone nor my laptop achieve to detect the module. I tried several other configurations found on differents tutorials, but without success.
Do you have any idea why I am unable to detect the Bluetooth module ? Do you think it is related to the fact it is a master Bluetooth module ?
The Bluetooth device is probably an HC-05 and is by default a slave i.e. it isn't a master until you configure it as a master, and it isn't your problem.
The blinking LED merely indicates that the power is connected.
If your phone is an Apple product it will not work. If your laptop is Windows and has bluetooth built-in, it should be fine.
Your problem may simply be the connections the wrong way round, you won't be the first to do that.
Thanks. I tried again and again, i followed exactly what is written in the pdf tutorial you linked to your message, I am sure I made the good connections, but the situation remains the same : the LED blinks, but the module cannot be detected.
The Bluetooth devices I used, to try to detect the bluetooth module are my windows 7 PC with a little usb bluetooth module, able to detect my phone, that I also tried to use, it is a samsung galaxy s1. I used an Alcatel 602 phone too. None of these devices was able to detect the JY MCU module, therefore I really think the problem comes from there.
Do you have any other idea of the problem's origin ?
I'm afraid I have run out of ideas, and I might point out that, since the pairing is between the Bluetooth module and the PC, you can successfully pair even if the wiring between Bluetooth and Arduino is the wrong way round. All you need is to see ablinking LED.
I have never succeeded in getting my PC to work. I use a Dell laptop, which works perfectly. I therefore blame the PC but have not pursued the matter. I assume both phones are Android and should be able to pair if the LED is on and blinking.
So that is 0 out of 3 and I hate to say it, but it looks like your bluetooth module is a dud. I have never heard of such a thing but the only alternative is that are not going through the proper procedure to sniff the bluetooth with the Samsung, and I don't see how you can get that wrong.
Flavi-1:
So do you think I have to change my module for another one, this time the slave version ?
I only say this because it seems pretty clear that you have done all the right things, and I am at a loss for a better answer. Having said that, these things can be had for about $7, so it seems pretty silly not to try substitution, if only to prove that it is not the answer.
For whatever you want to do, I'm sure the laptop or the phone will be the master, and it doesn't matter whether the Arduino is on a master or a slave. The HC-05 comes as a slave by default anyway, but you might as well get one as you might want to configure it as a master later. I believe the HC-05 and HC-06 are about the same price.