Interface of HC05 Bluetooth module and RF 433Mhz Module
It seems your 433 MHz RF link' data rate is too low for your application. 

Judging by your picture you are using RR10 series receiver. It's maximum data rate is only 2 kHz (2000 baud) and a baud rate stated in your code is 9600. Moreover, it seems the lowest possible baud rate for HC-05 is 4800.

Check your 433 MHz transmitter and receiver for their max data rate.