They are now connected/network, but it not able to send or receive data from slave/master...
help plssss.....
This particular Bluetooth module uses a 3.3v level for its data pins, and thus there is supposed to be a voltage divider to lower the 5v from the Arduino's TX pin to 3.3v, but since transmission from Arduino to phone works, I thought perhaps the Bluetooth module can possibly work with 5v inputs instead of its specified 3.3v, and thus did not include the voltage divider.(c)
master(arduino mega+hc-05)
slave(arduino nano+hc-05)
Not having a voltage divider will work, BUT your HC-05 will die much quicker than normally. I'd say put the divider in if you have space for it.
In terms of connectivity, are you sure that the devices are configured properly? Can you show a screenshot of the serial monitor for both the slave and master showing the baud, address, and CMODE properties (at least)? A picture of you actual project and your wiring might also help.
subair:
They are now connected/network, but it not able to send or receive data from slave/master..
Reading that lterally and assuming you really mean it..........
Connecting two blueteeth together, presumably an auto-connect, means no more than that. It does not mean that Arduino is connected properly to its bluetooth. Since you have presumably configured at least one bluetooth, you clearly know what you are doing in the wiring department, but check it just the same. It could be something silly that you only do once. Then check that the baud rates in Arduino code truly match those you set/verified in Blueteeth. If you are using software serial above 38400, don't.
You will see as many diagrams etc. without voltage dividers as with, but nobody can sensibly tell you it is a good idea.
