bluetooth module HC-05 not responding

my bluetooth module hc-05 connected with ardunio UNO and well paired with mobile phone but its not working , when i open serial monitor of ardunio and sends command 1 from mobile phone ,serial monitor shows ⸮ and this happened for every command.
what should I do......please help....??

pranav_rokde:
my bluetooth module hc-05 connected with ardunio UNO and well paired with mobile phone but its not working , when i open serial monitor of ardunio and sends command 1 from mobile phone ,serial monitor shows ⸮ and this happened for every command.
what should I do......please help....??

Secret code, then?