WG3526>EM20 loosing connection

[bcase7090]

A few weeks ago i finally for done building modem/router, 4x4 enclosure, WG3526, EM20 and a POE injector. it's on the sprint network and locked to band 41. About once or twice a day it needs a reboot, at first i set the connection monitoring to reboot the modem, ping 8.8.8.8 incase it went out, more recently i told told it to reboot the whole thing, but it still drops out, here's the log from the most recent one, am i missing anything on why it keeps dropping?

Code: Select all

Wed Dec 30 21:09:04 2020 kern.warn kernel: [13554.541595] ------------[ cut here ]------------
Wed Dec 30 21:09:04 2020 kern.warn kernel: [13554.546256] WARNING: CPU: 3 PID: 0 at net/sched/sch_generic.c:320 dev_watchdog+0x1ac/0x324
Wed Dec 30 21:09:04 2020 kern.info kernel: [13554.554505] NETDEV WATCHDOG: wwan0 (qmi_wwan): transmit queue 0 timed out
Wed Dec 30 21:09:04 2020 kern.warn kernel: [13554.561258] Modules linked in: rt2800usb rt2800lib qcserial pppoe ppp_async option cdc_mbim usb_wwan sierra_net sierra rt2x00usb rt2x00lib rndis_host qmi_wwan pppox ppp_generic nf_conntrack_ipv6 mt76x2e mt76x2_common mt76x02_lib mt7603e mt76 mac80211 iptable_nat ipt_REJECT ipt_MASQUERADE huawei_cdc_ncm cfg80211 cdc_ncm cdc_ether xt_time xt_tcpudp xt_tcpmss xt_statistic xt_state xt_recent xt_nat xt_multiport xt_mark xt_mac xt_limit xt_length xt_hl xt_helper xt_ecn xt_dscp xt_conntrack xt_connmark xt_connlimit xt_connbytes xt_comment xt_TCPMSS xt_REDIRECT xt_LOG xt_HL xt_FLOWOFFLOAD xt_DSCP xt_CLASSIFY usbserial usbnet usblp slhc nf_reject_ipv4 nf_nat_redirect nf_nat_masquerade_ipv4 nf_conntrack_ipv4 nf_nat_ipv4 nf_nat nf_log_ipv4 nf_flow_table_hw nf_flow_table nf_defrag_ipv6 nf_defrag_ipv4 nf_conntrack_rtcache
Wed Dec 30 21:09:04 2020 kern.warn kernel: [13554.632875]  nf_conntrack_netlink iptable_mangle iptable_filter ipt_ECN ip_tables crc_itu_t crc_ccitt compat cdc_wdm cdc_acm fuse sch_cake nf_conntrack act_skbedit act_mirred em_u32 cls_u32 cls_tcindex cls_flow cls_route cls_fw sch_tbf sch_htb sch_hfsc sch_ingress ledtrig_usbport xt_set ip_set_list_set ip_set_hash_netiface ip_set_hash_netport ip_set_hash_netnet ip_set_hash_net ip_set_hash_netportnet ip_set_hash_mac ip_set_hash_ipportnet ip_set_hash_ipportip ip_set_hash_ipport ip_set_hash_ipmark ip_set_hash_ip ip_set_bitmap_port ip_set_bitmap_ipmac ip_set_bitmap_ip ip_set nfnetlink ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 nf_log_common ip6table_mangle ip6table_filter ip6_tables x_tables ifb tun vfat fat hfs nls_utf8 nls_iso8859_1 nls_cp437 mmc_block usb_storage mtk_sd mmc_core leds_gpio xhci_mtk xhci_plat_hcd
Wed Dec 30 21:09:04 2020 kern.warn kernel: [13554.704175]  xhci_pci xhci_hcd uhci_hcd ohci_platform ohci_hcd ahci libahci libata ehci_platform sd_mod scsi_mod ehci_hcd gpio_button_hotplug ext4 jbd2 mbcache exfat usbcore nls_base usb_common mii crc32c_generic
Wed Dec 30 21:09:04 2020 kern.warn kernel: [13554.723044] CPU: 3 PID: 0 Comm: swapper/3 Not tainted 4.14.167 #0
Wed Dec 30 21:09:04 2020 kern.warn kernel: [13554.729108] Stack : 00000000 8f5d7840 80570000 800700a8 80590000 80532d78 00000000 00000000
Wed Dec 30 21:09:04 2020 kern.warn kernel: [13554.737443]         804fffdc 8fc0fdc4 8fc3cffc 8056c8c7 804fb008 00000001 8fc0fd68 ac07f5be
Wed Dec 30 21:09:04 2020 kern.warn kernel: [13554.745778]         00000000 00000000 805d0000 00006bc8 00000000 0000014d 00000008 00000000
Wed Dec 30 21:09:04 2020 kern.warn kernel: [13554.754111]         00000000 80570000 000b0864 00000000 00000000 80590000 00000000 80361fd0
Wed Dec 30 21:09:04 2020 kern.warn kernel: [13554.762445]         00000009 00000140 00000003 8f5d7840 00000000 8028b690 0000000c 805d000c
Wed Dec 30 21:09:04 2020 kern.warn kernel: [13554.770777]         ...
Wed Dec 30 21:09:04 2020 kern.warn kernel: [13554.773214] Call Trace:
Wed Dec 30 21:09:04 2020 kern.warn kernel: [13554.775679] [<800106a0>] show_stack+0x58/0x100
Wed Dec 30 21:09:04 2020 kern.warn kernel: [13554.780120] [<80440c44>] dump_stack+0xa4/0xe0
Wed Dec 30 21:09:04 2020 kern.warn kernel: [13554.784468] [<8002e958>] __warn+0xe0/0x114
Wed Dec 30 21:09:04 2020 kern.warn kernel: [13554.788546] [<8002e9bc>] warn_slowpath_fmt+0x30/0x3c
Wed Dec 30 21:09:04 2020 kern.warn kernel: [13554.793495] [<80361fd0>] dev_watchdog+0x1ac/0x324
Wed Dec 30 21:09:04 2020 kern.warn kernel: [13554.798198] [<800871c4>] call_timer_fn.isra.3+0x24/0x84
Wed Dec 30 21:09:04 2020 kern.warn kernel: [13554.803403] [<800873e0>] run_timer_softirq+0x1bc/0x248
Wed Dec 30 21:09:04 2020 kern.warn kernel: [13554.808538] [<8045e230>] __do_softirq+0x128/0x2ec
Wed Dec 30 21:09:04 2020 kern.warn kernel: [13554.813234] [<800330c4>] irq_exit+0xac/0xc8
Wed Dec 30 21:09:04 2020 kern.warn kernel: [13554.817411] [<802473ec>] plat_irq_dispatch+0xfc/0x138
Wed Dec 30 21:09:04 2020 kern.warn kernel: [13554.822443] [<8000b5e8>] except_vec_vi_end+0xb8/0xc4
Wed Dec 30 21:09:04 2020 kern.warn kernel: [13554.827384] [<8000cfb0>] r4k_wait_irqoff+0x1c/0x24
Wed Dec 30 21:09:04 2020 kern.warn kernel: [13554.832268] ---[ end trace 92d52a9ab916a088 ]---
Wed Dec 30 21:10:03 2020 user.notice Connection Monitor: Modem 1 Connection is Down (using Ping Test)
Wed Dec 30 21:10:06 2020 user.notice Power Toggle: Re-binding USB driver on usb1 to reset modem
Wed Dec 30 21:10:06 2020 kern.info kernel: [13616.168280] usb 1-2: USB disconnect, device number 2
Wed Dec 30 21:10:06 2020 kern.info kernel: [13616.173772] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
Wed Dec 30 21:10:06 2020 kern.info kernel: [13616.182154] option 1-2:1.0: device disconnected
Wed Dec 30 21:10:06 2020 kern.info kernel: [13616.187803] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
Wed Dec 30 21:10:06 2020 kern.info kernel: [13616.196189] option 1-2:1.1: device disconnected
Wed Dec 30 21:10:06 2020 kern.info kernel: [13616.201911] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
Wed Dec 30 21:10:06 2020 kern.info kernel: [13616.210278] option 1-2:1.2: device disconnected
Wed Dec 30 21:10:06 2020 kern.info kernel: [13616.215762] option1 ttyUSB3: GSM modem (1-port) converter now disconnected from ttyUSB3
Wed Dec 30 21:10:06 2020 kern.info kernel: [13616.224128] option 1-2:1.3: device disconnected
Wed Dec 30 21:10:06 2020 kern.info kernel: [13616.230505] qmi_wwan 1-2:1.4 wwan0: unregister 'qmi_wwan' usb-1e1c0000.xhci-2, WWAN/QMI device
Wed Dec 30 21:10:06 2020 daemon.notice netifd: Network device 'wwan0' link is down
Wed Dec 30 21:10:06 2020 daemon.notice netifd: Network alias 'wwan0' link is down
Wed Dec 30 21:10:06 2020 daemon.notice netifd: Interface 'wan1_6' has link connectivity loss
Wed Dec 30 21:10:06 2020 daemon.notice netifd: Interface 'wan1' has link connectivity loss
Wed Dec 30 21:10:06 2020 daemon.notice netifd: Interface 'wan1_6' is disabled
Wed Dec 30 21:10:06 2020 user.notice URL-DEBUG: hotplug (iface): action='ifdown' interface='wan1_6'
Wed Dec 30 21:10:06 2020 daemon.err odhcp6c[4342]: Failed to send DHCPV6 message to ff02::1:2 (Permission denied)
Wed Dec 30 21:10:06 2020 daemon.notice netifd: Interface 'wan1' is disabled
Wed Dec 30 21:10:06 2020 daemon.notice netifd: wan1 (4309): udhcpc: SIOCGIFINDEX: No such device
Wed Dec 30 21:10:06 2020 daemon.notice netifd: wan1 (4309): udhcpc: received SIGTERM
Wed Dec 30 21:10:06 2020 user.notice mwan3[8758]: Using firewall mask 0x3F00
Wed Dec 30 21:10:06 2020 user.notice mwan3[8758]: Max interface count is 60
Wed Dec 30 21:10:07 2020 user.notice URL-DEBUG: hotplug (iface): action='ifdown' interface='wan1'
Wed Dec 30 21:10:09 2020 daemon.warn dnsmasq[3506]: no servers found in /tmp/resolv.conf.auto, will retry
Wed Dec 30 21:10:10 2020 user.notice usb-modeswitch: *****************************************************************
Wed Dec 30 21:10:10 2020 user.notice usb-modeswitch: *
Wed Dec 30 21:10:10 2020 user.notice usb-modeswitch: * Remove : 1-2 : Modem1
Wed Dec 30 21:10:10 2020 user.notice usb-modeswitch: *
Wed Dec 30 21:10:10 2020 user.notice usb-modeswitch: *****************************************************************
Wed Dec 30 21:10:10 2020 user.notice usb-modeswitch: *****************************************************************
Wed Dec 30 21:10:10 2020 user.notice usb-modeswitch: *
Wed Dec 30 21:10:10 2020 user.notice usb-modeswitch: * No Modems present
Wed Dec 30 21:10:10 2020 user.notice usb-modeswitch: *
Wed Dec 30 21:10:10 2020 user.notice usb-modeswitch: *****************************************************************
Wed Dec 30 21:10:21 2020 kern.info kernel: [13631.370444] hub 1-0:1.0: USB hub found
Wed Dec 30 21:10:21 2020 kern.info kernel: [13631.374537] hub 1-0:1.0: 2 ports detected
Wed Dec 30 21:10:21 2020 kern.info kernel: [13631.988908] usb 1-2: new high-speed USB device number 3 using xhci-mtk
Wed Dec 30 21:10:22 2020 kern.info kernel: [13632.173698] option 1-2:1.0: GSM modem (1-port) converter detected
Wed Dec 30 21:10:22 2020 kern.info kernel: [13632.180670] usb 1-2: GSM modem (1-port) converter now attached to ttyUSB0
Wed Dec 30 21:10:22 2020 kern.info kernel: [13632.189142] option 1-2:1.1: GSM modem (1-port) converter detected
Wed Dec 30 21:10:22 2020 kern.info kernel: [13632.195835] usb 1-2: GSM modem (1-port) converter now attached to ttyUSB1
Wed Dec 30 21:10:22 2020 kern.info kernel: [13632.204402] option 1-2:1.2: GSM modem (1-port) converter detected
Wed Dec 30 21:10:22 2020 kern.info kernel: [13632.211269] usb 1-2: GSM modem (1-port) converter now attached to ttyUSB2
Wed Dec 30 21:10:22 2020 kern.info kernel: [13632.219757] option 1-2:1.3: GSM modem (1-port) converter detected
Wed Dec 30 21:10:22 2020 kern.info kernel: [13632.226471] usb 1-2: GSM modem (1-port) converter now attached to ttyUSB3
Wed Dec 30 21:10:22 2020 kern.info kernel: [13632.236776] qmi_wwan 1-2:1.4: cdc-wdm0: USB WDM device
Wed Dec 30 21:10:22 2020 kern.info kernel: [13632.244364] qmi_wwan 1-2:1.4 wwan0: register 'qmi_wwan' at usb-1e1c0000.xhci-2, WWAN/QMI device, 0e:2c:17:29:d0:0c
Wed Dec 30 21:10:22 2020 user.notice Log Print : Driver Name : 1 option
Wed Dec 30 21:10:22 2020 user.notice Log Print : Driver Name : 2 option
Wed Dec 30 21:10:22 2020 user.notice Log Print : Driver Name : 3 option
Wed Dec 30 21:10:22 2020 user.notice Log Print : Driver Name : 4 option
Wed Dec 30 21:10:22 2020 user.notice Log Print : Driver Name : 5 qmi_wwan
Wed Dec 30 21:10:22 2020 user.notice usb-modeswitch: Add : 1-2: Manufacturer=Quectel Product=EM20-G Serial=65812e1e 2c7c 0620
Wed Dec 30 21:10:22 2020 user.notice usb-modeswitch: *****************************************************************
Wed Dec 30 21:10:22 2020 user.notice usb-modeswitch: *
Wed Dec 30 21:10:22 2020 user.notice usb-modeswitch: * Start of Modem Detection and Connection Information
Wed Dec 30 21:10:22 2020 user.notice usb-modeswitch: *
Wed Dec 30 21:10:22 2020 user.notice usb-modeswitch: * Product=EM20-G 2c7c 0620
Wed Dec 30 21:10:22 2020 user.notice usb-modeswitch: *
Wed Dec 30 21:10:22 2020 user.notice usb-modeswitch: *****************************************************************
Wed Dec 30 21:10:22 2020 user.notice usb-modeswitch: *****************************************************************
Wed Dec 30 21:10:22 2020 user.notice usb-modeswitch: *
Wed Dec 30 21:10:22 2020 user.notice usb-modeswitch: * This device does not have a switch data file
Wed Dec 30 21:10:22 2020 user.notice usb-modeswitch: *
Wed Dec 30 21:10:22 2020 user.notice usb-modeswitch: * Product=EM20-G 2c7c 0620
Wed Dec 30 21:10:22 2020 user.notice usb-modeswitch: *
Wed Dec 30 21:10:22 2020 user.notice usb-modeswitch: *****************************************************************
Wed Dec 30 21:10:26 2020 kern.info kernel: [13636.848509] usb 1-2: USB disconnect, device number 3
Wed Dec 30 21:10:26 2020 kern.info kernel: [13636.854197] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
Wed Dec 30 21:10:26 2020 kern.info kernel: [13636.862623] option 1-2:1.0: device disconnected
Wed Dec 30 21:10:26 2020 kern.info kernel: [13636.868453] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
Wed Dec 30 21:10:26 2020 kern.info kernel: [13636.876922] option 1-2:1.1: device disconnected
Wed Dec 30 21:10:26 2020 kern.info kernel: [13636.883436] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
Wed Dec 30 21:10:26 2020 kern.info kernel: [13636.891920] option 1-2:1.2: device disconnected
Wed Dec 30 21:10:26 2020 kern.info kernel: [13636.897796] option1 ttyUSB3: GSM modem (1-port) converter now disconnected from ttyUSB3
Wed Dec 30 21:10:26 2020 kern.info kernel: [13636.906140] option 1-2:1.3: device disconnected
Wed Dec 30 21:10:26 2020 kern.info kernel: [13636.911519] qmi_wwan 1-2:1.4 wwan0: unregister 'qmi_wwan' usb-1e1c0000.xhci-2, WWAN/QMI device
Wed Dec 30 21:10:32 2020 user.notice usb-modeswitch: *****************************************************************
Wed Dec 30 21:10:32 2020 user.notice usb-modeswitch: *
Wed Dec 30 21:10:32 2020 user.notice usb-modeswitch: * Switched to : :
Wed Dec 30 21:10:32 2020 user.notice usb-modeswitch: *
Wed Dec 30 21:10:32 2020 user.notice usb-modeswitch: *****************************************************************
Wed Dec 30 21:10:32 2020 user.notice usb-modeswitch: *****************************************************************
Wed Dec 30 21:10:32 2020 user.notice usb-modeswitch: *
Wed Dec 30 21:10:32 2020 user.notice usb-modeswitch: * ProtoFind returns : 0
Wed Dec 30 21:10:32 2020 user.notice usb-modeswitch: *
Wed Dec 30 21:10:32 2020 user.notice usb-modeswitch: *****************************************************************
Wed Dec 30 21:10:33 2020 user.notice Power Toggle: Setting Modem Removal flag
Wed Dec 30 21:10:33 2020 user.notice Power Toggle: Setting Modem Removal flag
Wed Dec 30 21:10:38 2020 kern.info kernel: [13648.868307] usb 1-2: new high-speed USB device number 4 using xhci-mtk
Wed Dec 30 21:10:38 2020 kern.info kernel: [13649.053418] option 1-2:1.0: GSM modem (1-port) converter detected
Wed Dec 30 21:10:38 2020 kern.info kernel: [13649.060282] usb 1-2: GSM modem (1-port) converter now attached to ttyUSB0
Wed Dec 30 21:10:38 2020 kern.info kernel: [13649.068941] option 1-2:1.1: GSM modem (1-port) converter detected
Wed Dec 30 21:10:38 2020 kern.info kernel: [13649.075719] usb 1-2: GSM modem (1-port) converter now attached to ttyUSB1
Wed Dec 30 21:10:38 2020 kern.info kernel: [13649.084304] option 1-2:1.2: GSM modem (1-port) converter detected
Wed Dec 30 21:10:38 2020 kern.info kernel: [13649.091084] usb 1-2: GSM modem (1-port) converter now attached to ttyUSB2
Wed Dec 30 21:10:38 2020 kern.info kernel: [13649.099672] option 1-2:1.3: GSM modem (1-port) converter detected
Wed Dec 30 21:10:38 2020 kern.info kernel: [13649.106393] usb 1-2: GSM modem (1-port) converter now attached to ttyUSB3
Wed Dec 30 21:10:38 2020 kern.info kernel: [13649.115752] qmi_wwan 1-2:1.4: cdc-wdm0: USB WDM device
Wed Dec 30 21:10:39 2020 kern.info kernel: [13649.123213] qmi_wwan 1-2:1.4 wwan0: register 'qmi_wwan' at usb-1e1c0000.xhci-2, WWAN/QMI device, 0e:2c:17:29:d0:0c
Wed Dec 30 21:10:39 2020 user.notice usb-modeswitch: Wait for modem removal
Wed Dec 30 21:10:39 2020 user.notice usb-modeswitch: Wait for modem removal
Wed Dec 30 21:10:39 2020 user.notice usb-modeswitch: Wait for modem removal
Wed Dec 30 21:10:39 2020 user.notice usb-modeswitch: Wait for modem removal
Wed Dec 30 21:10:40 2020 user.notice usb-modeswitch: Wait for modem removal
Wed Dec 30 21:10:40 2020 user.notice usb-modeswitch: Wait for modem removal
Wed Dec 30 21:11:32 2020 daemon.err uhttpd[2141]: luci: accepted login on / for root from 192.168.1.131

Code: Select all

+QTEMP:"mdm-case-therm-adc","27"
OK
  
Thu Dec 31 15:43:02 2020 : /dev/ttyUSB2 AT+CPMS="SM"
+CPMS: 0,0,0,0,0,0
OK
  
Thu Dec 31 15:43:22 2020 : /dev/ttyUSB2 AT+CPMS="SM"
+CPMS: 0,0,0,0,0,0
OK
  
Thu Dec 31 15:43:45 2020 : /dev/ttyUSB2 AT+CREG=2;+CREG?;+CREG=0
+CREG: 2,3
OK
AT+CEREG=2;+CEREG?;+CEREG=0
+CEREG: 2,1,"56DE","0037E39",7
OK
AT+C5GREG=2;+C5GREG?;+C5GREG=0
ERROR
  
Thu Dec 31 15:43:48 2020 : /dev/ttyUSB2 AT+CSQ
+CSQ: 21,99
OK
AT+QENG="servingcell"
+QENG: "servingcell","NOCONN","LTE","TDD",310,120,37E39,42,41094,41,5,5,56DE,-99,-6,-73,22,-
OK
AT+QNWINFO
+QNWINFO: "TDD LTE","312530","LTE BAND 41",41094
OK
AT+QCAINFO
OK
AT+QCFG="nwscanmode"
+QCFG: "nwscanmode",0
OK
AT+QTEMP
ERROR
AT+CNMI=0,0
OK
  
Thu Dec 31 15:43:50 2020 : /dev/ttyUSB2 AT+CPMS="SM"
+CPMS: 0,0,0,11,0,11
OK
  
Thu Dec 31 15:44:10 2020 : /dev/ttyUSB2 AT+CPMS="SM"
+CPMS: 0,0,0,11,0,11
OK
  
Thu Dec 31 15:44:31 2020 : /dev/ttyUSB2 AT+CPMS="SM"
+CPMS: 0,0,0,11,0,11
OK

[bcase7090]

Bump

Does anyone have any insight on this, it's getting annoying when it disconnects and reboots.

[Didneywhorl]

Is the EM20 in a USB adapter or in a mini-pcie to M.2 adapter?

Also have you tried the latest WG3526-P firmware?

I know the EM20 can do weird crap, but that looks like the router is dropping the bus completely.

[bcase7090]

I'm using the Mini-pcie to m.2 adapter and i am running "GoldenOrb_2020-05-16"

[Didneywhorl]

The latest wifix is: https://drive.google.com/file/d/1qFndpe ... sp=sharing


and the latest rooter: http://ofmodemsandmen.com/upload/WG3526-GO2021-02-05.zip

[bcase7090]

So i updated the firmware, still disconnecting, i took the EM20 and put it in the USB adapter to the USB port and it's still doing it. anything else i can try?

[Didneywhorl]

Is it just losing connection, or is the modem rebooting/resetting?


Checking your logs again, it looks like you have the connection monitor on and it is resetting your modem when ping no longer responds.

You also have the NWSCANMODE set to 0, which allows non LTE connections. I usually set mine to 3 (LTE only)

Code: Select all

AT+QCFG="NWSCANMODE",3

Your in QMI mode it seems. I like mine to be in mbim.

Code: Select all

AT+QCFG="usbnet",2

then

Code: Select all

AT+CFUN=1,1

[Didneywhorl]

Are your signal levels any good?

[RockyinNM]

Is it just losing connection, or is the modem rebooting/resetting?


Checking your logs again, it looks like you have the connection monitor on and it is resetting your modem when ping no longer responds.

You also have the NWSCANMODE set to 0, which allows non LTE connections. I usually set mine to 3 (LTE only)

Code: Select all

AT+QCFG="NWSCANMODE",3

Your in QMI mode it seems. I like mine to be in mbim.

Code: Select all

AT+QCFG="usbnet",2

then

Code: Select all

AT+CFUN=1,1

I DO NOT want to hijack this thread, but could you share why you like mbim--over QMI mode??
and what would be the AT command to return it back to QMI mode, if things did not work out.
Thanks

[bcase7090]

it is loosing connection and when i have the connection profile set to reboot if there is a loss

I do not, from the factory it was set to MBIM, but i just pushed those AT commands and we shall see.

[Didneywhorl]

I DO NOT want to hijack this thread, but could you share why you like mbim--over QMI mode??
and what would be the AT command to return it back to QMI mode, if things did not work out.
Thanks

I prefer it as I find it's overall top speeds to be higher on average, and for some reason Verizon connections tend to work more often then not when in MBIM vs QMI. Visible included. IT shouldn't be that way, but it's what I find. I just have better overall luck connecting to different plans in MBIM vs QMI.


For all Quectel Modems:
MBIM:

Code: Select all

AT+QCFG="usbnet",2

then

Code: Select all

AT+CFUN=1,1

QMI:

Code: Select all

AT+QCFG="usbnet",0

then

Code: Select all

AT+CFUN=1,1

[Tony2k]

I have exactly the same problem with my ZBT-WE826 + Sierra EM7455, every 3-4 hours it looses internet connection and I have to restart wwan. I tried Rooter, OpenWRT, MBIM and QMI mode and also ModemManeger but the problem is always the same. I don't think that can be hardware related because Volts value and also lte signal are good.

Did you found anything good to solve?

[Didneywhorl]

I have exactly the same problem with my ZBT-WE826 + Sierra EM7455, every 3-4 hours it looses internet connection and I have to restart wwan. I tried Rooter, OpenWRT, MBIM and QMI mode and also ModemManeger but the problem is always the same. I don't think that can be hardware related because Volts value and also lte signal are good.

Did you found anything good to solve?

Have you tried checking the option to "Drop Invalid Packets" ?

[Tony2k]

No but I'm trying now.