Nick_Pyner:
lelino:
I tried an HC-05 from a different maker and everything works well using Arduino pins 0 and 1.This suggests a mechanical fault with the original. Some people have had a solder bridge on the backboard.
I don't think so cause it works properly with SoftwareSerial using other pins. Should it be a mechanical fault, it would not have had to work even with SoftwareSerial !!!
Still waiting for the oscilloscope 