Smart car Bluetooth module based on stm32f103c8t6

1. Introduction to Bluetooth module

1.1、HC05

1.1.1, HC05AT instruction

• AT identifies whether to enter AT mode    
• AT+NAME / AT+NAME=< param > ask name/set name  
• AT+RNAME? <param1> Get remote bluetooth device name:  
• AT+PSWD / AT+PSWD=< param > ask password/ set password    
• AT+UART /AT+UART=< param >< param2 >< param3 >    query baud rate/set baud rate (default 9600,0,0); param2: 0 is 1 stop bit, 1 is 2 stop bits ;param3 is to set parity, 0 is no parity, 1 is odd parity, 2 is even parity.   

• AT+ROLE/AT+ROLE=< param > query master-slave mode/set master-slave mode (return value: 0 slave; 1 master) +ROLE:< param>OK    
• AT+ADDR/AT+ADDR=< param > query/change module address    
• AT+R