 | 1 | initial version |
In your provided captures there is not a real problem. One TCP segment did not get an ACK in time, so the 200ms RTO timer fires and triggers a retransmission which is properly ACKed. So this problably means there is a certain amount of packet loss between the endpoints.
BTW, the captures were not made at the same time, so it is not possible to see wheter the packet loss was on the way to the device or on the way back from the device. Please provide traces of the app and the device at the same when the problem is happening.
I skimmed youtr stackoverflow question, so it seems the problem might lie more at the message content level than at the TCP level (even though there might be the occasional retransmission due to packet loss)
