https://www.jianshu.com/p/14ef6f207b7a

树莓派蓝牙串口通讯
https://blog.csdn.net/wanyeye/article/details/52909869

https://blog.csdn.net/qq_37760746/article/details/103045867?utm_medium=distribute.pc_aggpage_search_result.none-task-blog-2~all~baidu_landing_v2~default-5-103045867.nonecase&utm_term=%E6%A0%91%E8%8E%93%E6%B4%BE%E8%93%9D%E7%89%99%E4%B8%8E%E6%89%8B%E6%9C%BA%E7%9A%84%E9%80%9A%E8%AE%AF&spm=1000.2123.3001.4430

十三、树莓派4B蓝牙与HC-05串口通信测试

https://blog.csdn.net/recclay/article/details/104671734