Vcc is arduino 5V output pin that powers both HC05 and shield.Mega is powered through RS232 cable.
I don't think it's the bluetooth module, I think it's a power issue. To be sure, can you post a schematic of how everything is powered?
I have tried to use seperate power supply, this power supply configuration is just only for test purposes until I make sure that it is completly working.
So you are happy to overload/break something in testing? Doesn't sound sensible.When you tried to use a separate supply, was it powerful enough, was it connected correctly, what happened?
Hi,You need a separate power supply for the motors. Is that clear, now?Look at the diagram of that shield. It has a jumper so you can remove it to use external power.See THIS PAGE which is a nice tutorial and all the information you need. Written by the Lady who DESIGNED this shield.
Is this better than the previous?
No.You tell us in post#0 that you're using an (obsolete) Adafruit V1 shield.And then you post a picture of a sparkfun board.No proper advice can be given if you don't tell us exactly what you have.A real picture could also help.Leo..