I'm still trying to go through logs figuring out what is happening. There shouldn't be a problem using ModemManager on a travel router, correct? It has been done before? Peter
From: Peter Krause <pe...@uringme.com> To: ModemManager (development) <modemmanager-devel@lists.freedesktop.org> Sent: Monday, December 17, 2018 3:26 PM Subject: OpenWRT Sierra EM7455 drops connection while driving I have a Sietta EM7455 LTE modem in a recent Lede build: OpenWrt SNAPSHOT r6550-83e1fceI'm using a USA Sprint SIM. I did the AT commands to add the Sprint bands and put the modem in MBIM mode.ModemManager is v1.8.0 /etc/config/network has the following block:config interface 'wwan' option _orig_ifname 'wwan0' option _orig_bridge 'false' option proto 'modemmanager' option device '/sys/devices/platform/ehci-platform/usb1/1-1' option apn 'r.ispsn' option auth 'none' When ModemManager starts, no problems with connection. It comes right up, and mmcli says it's in connect mode. 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. 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 mm.log: https://pastebin.com/GY6k9Qykmessages: https://pastebin.com/aitKE0Mb 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. ThanksPeter Krause
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