2024-08-19 17:18:54 send - data: 
 len:1
2024-08-19 17:18:56 read - data: 
2024-08-19 17:18:56 send - data: 
 len:1
2024-08-19 17:18:58 read - data: 
2024-08-19 17:18:58 send - data: 
 len:1