<html><head></head><body><div style="color:#000; background-color:#fff; font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px"><div dir="ltr" id="yui_3_16_0_ym19_1_1545229054880_11137"><span id="yui_3_16_0_ym19_1_1545229054880_11138">I added the line with otasn, and it actually worked a lot better! Thank you for that tip! I made several tower handoffs with no drop in connection. However, when I traveled through a low signal area, the connection dropped and MM never tried to connect again. If I did a: "ifup wwan", MM came back with a new bearer (the bearer number increased) and I got my connection back, but with a new IP address. </span></div><div dir="ltr" id="yui_3_16_0_ym19_1_1545229054880_11139"><br clear="none" id="yui_3_16_0_ym19_1_1545229054880_11140"></div><div dir="ltr" id="yui_3_16_0_ym19_1_1545229054880_11141"><span id="yui_3_16_0_ym19_1_1545229054880_11142">Is there a way to force MM to try to connect again if it drops from Connected back to Registered?</span></div><div dir="ltr" id="yui_3_16_0_ym19_1_1545229054880_11143"><span id="yui_3_16_0_ym19_1_1545229054880_11144"><br id="yui_3_16_0_ym19_1_1545229054880_11145"></span></div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1545229054880_11163"><br><br></div><div class="yahoo_quoted" id="yui_3_16_0_ym19_1_1545229054880_11167" style="display: block;"> <div style="font-family: Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 13px;" id="yui_3_16_0_ym19_1_1545229054880_11166"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_ym19_1_1545229054880_11165"> <div dir="ltr" id="yui_3_16_0_ym19_1_1545229054880_11164"> <font size="2" face="Arial" id="yui_3_16_0_ym19_1_1545229054880_11169"> <hr size="1"> <b><span style="font-weight:bold;">From:</span></b> Russ Westrem <lspwaterproofing@gmail.com><br> <b><span style="font-weight: bold;">To:</span></b> ModemManager <modemmanager-devel@lists.freedesktop.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Tuesday, December 18, 2018 6:45 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: OpenWRT Sierra EM7455 drops connection while driving<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_ym19_1_1545229054880_11171"><br><div id="yiv7805136605"><div id="yui_3_16_0_ym19_1_1545229054880_11174"><div id="yiv7805136605edo-message"><div id="yui_3_16_0_ym19_1_1545229054880_11173"><br clear="none"><br clear="none"><br clear="none"><div id="yiv7805136605edo-signature"></div></div></div><div id="yiv7805136605edo-original"><div id="yui_3_16_0_ym19_1_1545229054880_11178"><blockquote type="cite" id="yui_3_16_0_ym19_1_1545229054880_11177"><div class="yiv7805136605yqt2762298392" id="yiv7805136605yqt89059"><div id="yiv7805136605edo-meta">On Dec 17, 2018 at 2:26 PM, <<a rel="nofollow" shape="rect" ymailto="mailto:peter@uringme.com" target="_blank" href="mailto:peter@uringme.com">Peter Krause</a>> wrote: <br clear="none"><br clear="none"></div><div style="color:#000;background-color:#fff;font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px;" id="yui_3_16_0_ym19_1_1545229054880_11180"><div dir="ltr" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208540">I have a Sietta EM7455 LTE modem in a recent Lede build: OpenWrt SNAPSHOT r6550-83e1fce</div><div dir="ltr" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208541">I'm using a USA Sprint SIM. I did the AT commands to add the Sprint bands and put the modem in MBIM mode.</div><div dir="ltr" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208542">ModemManager is v1.8.0</div><div dir="ltr" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208543"><br clear="none" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208544"></div><div dir="ltr" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208545">/etc/config/network has the following block:</div><div dir="ltr" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208546">config interface 'wwan'</div><div dir="ltr" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208547"> option _orig_ifname 'wwan0'</div><div dir="ltr" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208548"> option _orig_bridge 'false'</div><div dir="ltr" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208549"> option proto 'modemmanager'</div><div dir="ltr" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208550"> option device '/sys/devices/platform/ehci-platform/usb1/1-1'</div><div dir="ltr" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208551"> option apn 'r.ispsn'</div><div dir="ltr" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208552"> option auth 'none'</div><div dir="ltr" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208553"><br clear="none" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208554"></div><div dir="ltr" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208555">When ModemManager starts, no problems with connection. It comes right up, and mmcli says it's in connect mode.</div><div dir="ltr" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208556"><br clear="none" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208557"></div><div dir="ltr" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208558">When I drive, the connection is fine for a while, then drops and I can't bring it back without rebooting the router. I tried "/etc/init.d/modemmanager restart" and it will say it has re-connected, but I can't ping out. When I reboot the router, everything comes back immediately on bootup and I can browse again.</div><div dir="ltr" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208559"><br clear="none" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208560"></div><div dir="ltr" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208561">I put the modem in debug mode and drove around until it failed, attached are the mm.log from ModemManager in debug mode, and the /var/log/messages from Lede/OpenWRT</div><div dir="ltr" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208562"><br clear="none" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208563"></div><div dir="ltr" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208564">mm.log: <a rel="nofollow" shape="rect" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208565" target="_blank" href="https://pastebin.com/GY6k9Qyk" style="color:rgb(25,106,212);">https://pastebin.com/GY6k9Qyk</a></div><div id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208566">messages: <a rel="nofollow" shape="rect" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208567" target="_blank" href="https://pastebin.com/aitKE0Mb" style="background-color:rgb(255,255,255);color:rgb(25,106,212);">https://pastebin.com/aitKE0Mb</a><br clear="none" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208568"></div><div dir="ltr" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208569"><br clear="none" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208570"></div><div dir="ltr" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208571"><br clear="none" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208572"></div><div dir="ltr" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208573">Any clue why it won't work while driving around town? It seems like it can't recover from a tower handoff, but I know the Sierra EM7455 is supposed to be able to handle that.</div><div dir="ltr" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208574"><br clear="none" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208575"></div><div dir="ltr" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208576">Thanks</div><div dir="ltr" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208577">Peter Krause</div><div dir="ltr" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208578"><br clear="none" id="yiv7805136605yui_3_16_0_ym19_1_1544734562004_208579"></div></div></div>_______________________________________________ ModemManager-devel mailing list <a rel="nofollow" shape="rect" ymailto="mailto:ModemManager-devel@lists.freedesktop.org" target="_blank" href="mailto:ModemManager-devel@lists.freedesktop.org">ModemManager-devel@lists.freedesktop.org</a> <a rel="nofollow" shape="rect" target="_blank" href="https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel">https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel</a> </blockquote><blockquote type="cite"><br clear="none"></blockquote><blockquote type="cite"><br clear="none"></blockquote><blockquote type="cite">You need to add cgdcont=3,"IPV4V6","OTASN"</blockquote><blockquote type="cite"><br clear="none"></blockquote><blockquote type="cite">Sprint seems to need this second apn for tower handoffs. </blockquote></div></div></div></div><div class="yqt2762298392" id="yqt95237">_______________________________________________<br clear="none">ModemManager-devel mailing list<br clear="none"><a shape="rect" ymailto="mailto:ModemManager-devel@lists.freedesktop.org" href="mailto:ModemManager-devel@lists.freedesktop.org">ModemManager-devel@lists.freedesktop.org</a><br clear="none"><a shape="rect" href="https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel" target="_blank">https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel</a><br clear="none"></div><br><br></div> </div> </div> </div></div></body></html>