I also tried it from my Android tablet. -> Same results. (It only sent "AT\r" though. But that should have generated an AT response anyways.)
This thing has been driving me nuts for the last three days. I wasted soo many hours; it's quite unbelievable... I'm also not using an Arduino for testing the HC-05 because it is just another potential point of failure. I'm connecting it directly to my PC using my TTL-USB adapter.
I'm not sure if you're on drugs or something, but if anyone should be upset here, then it's certainly me. Why do I constantly have to repeat myself? Why did it took you until post #8 to realize that I' connecting to the HC-05 directly via a TTL cable?
Well, not only was that the first time you mentioned that you were attempting to configure an HC-05 with a PC
you were attempting to configure an HC-05 with a PC but also I'm afraid it to me that long to realise that anybody might do anything so stupid.
not only were you never clear about what you were trying to do
but also you are deafeningly silent about the Arduino you are using
If I had realised what a futile waste of time this was, I would never have attempted to help in the first place.