YouTube:- Materials:-Arduino UNOHC-05 Bluetooth ModuleBreadboardJumpersCircuit:-AT Commands:-AT : Check the connection. AT+NAME : See default name AT+ADDR : See default address AT+VERSION : See version AT+UART : See Baudrate AT+ROLE : See role of BT Module(1=master/0=slave) AT+PSWD : See default PasswordAT+NAME= : Set Name AT+PSWD=" " : Set PasswordAT+RESET : Reset and exit AT mode