KC868-A8 TCP -Server

[Dm81]

do you means: you have some KC868-A8 board, same program code, one A8 board have this issue, others work well?

Yes, I have maybe 8 kincony device (all configured in server mode) that manage my home from 2 or 3 years
I add A8 as last device but I have this problem
I make a small programm that turn on and off relay 7 every 1 sec
In the back you can see the web page of the device, 2 thinks:
1 I revecive the sent message in maybe all reply (just first reply not include the sent message)
2 Client is disconnected after problem

For connection I use synapse library
thank you