Conncet Bluetoth module HC-05 to Arduino Uno Using UART Usb to enter in AT command
By using SoftSerial you can connect the HC-05 module to another pin than D0 and D1. Example connect HC-05 to D2 and D3 and define SoftSerial to use D2 and D3.

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| HC-05 +---(SoftSerial)---(D2/3)+ Arduino +(D0/1)---(Serial USB)---+ PC |
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