Hi, im new on the forum 
, i want to ask how to use the AT comands with the HC 05 module,
i bought one of this modules (module image)btTBQz-uQm4ow~~60_12.JPG) to use it with my arduino UNO, but i
dont know how to use the AT comands, for example: i want to change the name of the HC05 bluetooth pair key from "1234" to
"0061" wtith this line
Serial.println("AT+PIN0061")
But i can´t, can you help me?