<div dir="ltr">We have set up:<blockquote style="margin:0 0 0 40px;border:none;padding:0px"><div>-- a K2 Altus for serial datastream at 100 sps on 3 channels, using Mode 1, baud of 38400, default buffer size, and looks like the default packet size is "dynamic 2048". (Not sure what dynamic 2048 really means though.)</div><div><div><br></div></div><div><div>-- The K2 is serially connected to a GX-440 with a static public-IP. Its serial configuration is set for 38400, 8, N, 1 with no flow control, IP protocol is set to TCP, and port set to 16030. Thus the modem (similar to Lantronix devices which others have used) wraps an IP wrapper around the serial packets and transmits them to destination IP or our Earthworm host system which is purposely located not behind a firewall at this time to simplify testing and too connected to a GX-440 modem with a static public-IP.</div></div><div><div><br></div></div><div><div>-- K2ew_tcp has the source IP set to GX-440 modem's public IP and the port is set to 16030.</div></div></blockquote><div><div><br></div><div>At first the k2ew_tcp module was "dead" but then in a couple of minutes after K2 started sending data it switched status -- alive. However, a sniffwave showed no data. a packet sniffer showed packets from the source IP and port arriving at EW host but packets sizes were small < 80 bytes and there were numerous re-transmissions arriving. I expected packet sizes on the order of 1024 - 2048 bytes. The re-transmissions seem to indicate that there is no handshaking between source IP and EW host IP. Eventually the k2ew_tcp module went "dead" again.</div><div><br></div><div>Thus I am wondering if K2 set up using wrong mode where mode 3 uses full handshaking, possibly protocol should be UDP rather than TCP to allow packets to stream without handshaking, or simply have k2ew_tcp.d configured wrong. </div><div><br></div><div>Hope I have described the scenario with sufficient detail to understand.</div><div>Mark<br></div><div><br></div><div><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr"><span style="color:rgb(136,136,136);font-family:'Times New Roman',Times">******************************</span><span style="color:rgb(136,136,136);font-family:'Times New Roman',Times">***************************</span><br style="color:rgb(136,136,136);font-family:'Times New Roman',Times"><span style="font-family:'Times New Roman',Times"><font color="#0000ff">Mark Meremonte</font><font color="#666666"> Geophysicist </font></span><br style="font-family:'Times New Roman',Times"><span style="color:rgb(102,102,102);font-family:'Times New Roman',Times">U.S. Bureau of Reclamation: Seismotectonics & Geophysics Group</span><br><div><span style="font-family:'Times New Roman',Times"><font color="#666666"><span style="background-color:rgb(255,255,255)">Denver Federal Center</span> Work: 303-445-3298 Cell: 303-808-3894</font></span></div><div><font color="#666666"><span style="font-family:'Times New Roman',Times">POBox 25007, 85-833000</span><span style="font-family:'Times New Roman',Times"> Email: <a href="mailto:mmeremonte@usbr.gov" target="_blank">mmeremonte@usbr.gov</a></span><br style="font-family:'Times New Roman',Times"><span style="font-family:'Times New Roman',Times">Denver, CO 80225 </span><span style="font-family:'Times New Roman',Times"> </span><span style="font-family:'Times New Roman',Times"> Web: </span><font face="Times New Roman, Times"><a href="http://www.usbr.gov" target="_blank">http://www.usbr.gov</a></font></font></div><div><font color="#666666"><span style="font-family:'Times New Roman',Times">Ship: </span><span style="font-family:'Times New Roman',Times">U.S. Bureau of Reclamation, DFC, Bldg. 67-10th Floor, Denver, CO 80225</span></font></div><div><span style="color:rgb(136,136,136);font-family:'Times New Roman',Times">******************************</span><span style="color:rgb(136,136,136);font-family:'Times New Roman',Times">**************</span><span style="color:rgb(136,136,136);font-family:'Times New Roman',Times">**************</span></div></div></div>
</div></div></div>