[lwip-users] Missing Ack and TCP retransmission

[Jaws]

Hi,
my embedded application send to Cosm some sensor data every 15 secs. 
Everything works fine for about 20 connections.
At some point there is a TCP retransmission due to, I am supposing, a 
missing ACK. After that no data is received from the Cosm Server and the 
connection doesn't complete properly.

In attach the pcap captured for the connections. Any suggestions is welcome.

I am using lwip 1.3.2.

Thanks
Jaws

connection_issue.pcap
Description: application/cap