raspberry pi bluetooth , HC-05 module

1.

【树莓派4B学习】十三、树莓派4B蓝牙与HC-05串口通信测试

ref https://www.freesion.com/article/3470468589/

cmd:sudo rfcomm bind 1 98:D3:32:71:30:7A

ls -ltra /dev/rf*

2. how to debug

sudo apt-get install minicom

minicom -D /dev/rfcomm1 -b 9600

https://blog.csdn.net/little_bobo/article/details/78561249