liblwip logs

[mariuszb]

Is there a possibility to have logs from the library liblwip ?? (SDK 1.3.0)

[eriksl]

I don't think liblwip generates any logging. A well-designed library shouldn't be logging anyway.

[mariuszb]

too often I get the error: TCP connection error: -8 ( Connection aborted) , I would like to know why

[eriksl]

That's probably not the library itself but the "espconn" "glue" that Espressif added.

It probably means the connection was refused; that "other site" (aka the "foreign host") sent a RST instead of a SYN+ACK in response to the SYN from the esp8266, which usually means it doesn't have an application listening on that port. Next step is the use of a network sniffer like tcpdump or wireshark.

[mariuszb]

Its not only may problem, and not problem of one server
I am using Sming framework btw. very nice work


It may sming, maybe some other reason, but to find solution logs would be welcome

[eriksl]

It may also mean that the "other side" aborts a connection that already has been established, in a rude way by sending a RST instead of the normal polite way using FIN+ACK. Webservers seem to do that often. In that case it's actually not an error.