We use the Wiz107SR serial to Ethernet part in equipment we build. The typical communications process is to locate the our head-end equipment with the Wiz107SR at some remote location and establish a tcp/ip socket connection to a server and constantly communicate. The maximum time between either normal communications or heartbeat is 12-seconds. This connection needs to be persistent and most of the time it is.
We have noticed that lately while using the latest 4.05 Wiz107SR firmware we experience the Wiznet socket disconnecting and re-connecting rapidly when the Network setting have DHCP selected. If we change (where possible) to a fixed IP address the Wiz107SR behaves normally (no disconnect and re-connecting sockets). We rely on DHCP for most of our installations since this is by far the simplest connection process for most IT departments where our equipment is located. Has anyone else experienced this behavior? It seems to be only after upgrading to Version 4.05 which was necessary because we were previous experience the FF:FF:FF:FF:FF:FF MAC Address problem. Is there an upgrade or fix for this?
Thanks, Ron Hill