[lwip-users] lwIP delay delivering data to low_level_output

[Adriano Pallavicino]

Hi, I am using lwIP 1.4.1 to send data over 3G on embedded device. I have this problem:

Sometimes, after " netconn_write(conn, data, (size_t)len, NETCONN_NOFLAG); " the lwIP wait thousands ms before sending data to low_level_output function. 

Attached to this email you can see what I mean with delay (from 51s to 51.8). When red go down we enter inside netconn_write, and It finish when red rise up again. The blu line is the call to low_level_output (on falling edge). 

I know there is no code to see and no more debug data trace, but maybe someone can get an idea. If necessary I can give wireshark log and logs from lwIP code.

Thank you, best regards

Adriano

delay_file_send_eth_out.jpeg
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opt.h
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