Hi, all. Before, I still can use this usb modem on this router. Today, it can't connect to internet. I check dashboard and see router can't get IP in 3G proto. I think reason is AT command sent to this modem. Please help me fix this issue. I still can use this modem on Windows 11 and connect to internet normal. Thanks.
Thu Jan 5 06:28:07 2023 kern.info kernel: [ 19.671636] usbcore: registered new interface driver qmi_wwan
Thu Jan 5 06:28:07 2023 kern.info kernel: [ 19.680435] usbcore: registered new interface driver rndis_host
Thu Jan 5 06:28:07 2023 kern.info kernel: [ 19.689829] usbcore: registered new interface driver sierra
Thu Jan 5 06:28:07 2023 kern.info kernel: [ 19.695788] usbserial: USB Serial support registered for Sierra USB modem
Thu Jan 5 06:28:07 2023 kern.info kernel: [ 19.702752] sierra 1-1:1.0: Sierra USB modem converter detected
Thu Jan 5 06:28:07 2023 kern.info kernel: [ 19.710627] usb 1-1: Sierra USB modem converter now attached to ttyUSB0
Thu Jan 5 06:28:07 2023 kern.info kernel: [ 19.717775] sierra 1-1:1.1: Sierra USB modem converter detected
Thu Jan 5 06:28:07 2023 kern.info kernel: [ 19.724881] usb 1-1: Sierra USB modem converter now attached to ttyUSB1
Thu Jan 5 06:28:07 2023 kern.info kernel: [ 19.732005] sierra 1-1:1.3: Sierra USB modem converter detected
Thu Jan 5 06:28:07 2023 kern.info kernel: [ 19.739276] usb 1-1: Sierra USB modem converter now attached to ttyUSB2
Thu Jan 5 06:28:07 2023 kern.info kernel: [ 19.746536] sierra 1-1:1.4: Sierra USB modem converter detected
Thu Jan 5 06:28:07 2023 kern.info kernel: [ 19.753567] usb 1-1: Sierra USB modem converter now attached to ttyUSB3
Thu Jan 5 06:28:07 2023 kern.info kernel: [ 19.768753] sierra_net 1-1:1.7 wwan0: register 'sierra_net' at usb-1e1c0000.xhci-1, Sierra Wireless USB-to-WWAN Modem, ce:e4:d2:96:01:07
Thu Jan 5 06:28:07 2023 kern.info kernel: [ 19.783533] usbcore: registered new interface driver sierra_net
Thu Jan 5 06:28:07 2023 kern.info kernel: [ 19.802883] usbcore: registered new interface driver option
Thu Jan 5 06:28:07 2023 kern.info kernel: [ 19.808812] usbserial: USB Serial support registered for GSM modem (1-port)
Thu Jan 5 06:28:07 2023 user.info kernel: [ 19.821440] kmodloader: done loading kernel modules from /etc/modules.d/*
Thu Jan 5 06:28:09 2023 user.notice dnsmasq: DNS rebinding protection is active, will discard upstream RFC1918 responses!
Thu Jan 5 06:28:09 2023 user.notice dnsmasq: Allowing 127.0.0.0/8 responses
Thu Jan 5 06:28:09 2023 daemon.info dnsmasq[1]: started, version 2.86 cachesize 150
Thu Jan 5 06:28:09 2023 daemon.info dnsmasq[1]: DNS service limited to local subnets
Thu Jan 5 06:28:09 2023 daemon.info dnsmasq[1]: compile time options: IPv6 GNU-getopt no-DBus UBus no-i18n no-IDN DHCP no-DHCPv6 no-Lua TFTP no-conntrack no-ipset no-auth no-cryptohash no-DNSSEC no-ID loop-detect inotify dumpfile
Thu Jan 5 06:28:09 2023 daemon.info dnsmasq[1]: UBus support enabled: connected to system bus
Thu Jan 5 06:28:09 2023 daemon.info dnsmasq[1]: using only locally-known addresses for test
Thu Jan 5 06:28:09 2023 daemon.info dnsmasq[1]: using only locally-known addresses for onion
Thu Jan 5 06:28:09 2023 daemon.info dnsmasq[1]: using only locally-known addresses for localhost
Thu Jan 5 06:28:09 2023 daemon.info dnsmasq[1]: using only locally-known addresses for local
Thu Jan 5 06:28:09 2023 daemon.info dnsmasq[1]: using only locally-known addresses for invalid
Thu Jan 5 06:28:09 2023 daemon.info dnsmasq[1]: using only locally-known addresses for bind
Thu Jan 5 06:28:09 2023 daemon.info dnsmasq[1]: using only locally-known addresses for lan
Thu Jan 5 06:28:09 2023 daemon.warn dnsmasq[1]: no servers found in /tmp/resolv.conf.d/resolv.conf.auto, will retry
Thu Jan 5 06:28:09 2023 daemon.info dnsmasq[1]: read /etc/hosts - 4 addresses
Thu Jan 5 06:28:09 2023 daemon.info dnsmasq[1]: read /tmp/hosts/dhcp.cfg01411c - 0 addresses
Thu Jan 5 06:28:10 2023 authpriv.info dropbear[2454]: Not backgrounding
Thu Jan 5 06:28:13 2023 user.notice : Added device handler type: bonding
Thu Jan 5 06:28:13 2023 user.notice : Added device handler type: 8021ad
Thu Jan 5 06:28:13 2023 user.notice : Added device handler type: 8021q
Thu Jan 5 06:28:13 2023 user.notice : Added device handler type: macvlan
Thu Jan 5 06:28:13 2023 user.notice : Added device handler type: veth
Thu Jan 5 06:28:13 2023 user.notice : Added device handler type: bridge
Thu Jan 5 06:28:13 2023 user.notice : Added device handler type: Network device
Thu Jan 5 06:28:13 2023 user.notice : Added device handler type: tunnel
Thu Jan 5 06:28:13 2023 daemon.notice wpa_supplicant[2745]: Successfully initialized wpa_supplicant
Thu Jan 5 06:28:13 2023 cron.err crond[2975]: crond (busybox 1.35.0) started, log level 5
Thu Jan 5 06:28:14 2023 user.notice ucitrack: Setting up /etc/config/network reload dependency on /etc/config/dhcp
Thu Jan 5 06:28:14 2023 user.notice ucitrack: Setting up /etc/config/wireless reload dependency on /etc/config/network
Thu Jan 5 06:28:14 2023 user.notice ucitrack: Setting up /etc/config/firewall reload dependency on /etc/config/luci-splash
Thu Jan 5 06:28:14 2023 user.notice ucitrack: Setting up /etc/config/firewall reload dependency on /etc/config/qos
Thu Jan 5 06:28:14 2023 user.notice ucitrack: Setting up /etc/config/firewall reload dependency on /etc/config/miniupnpd
Thu Jan 5 06:28:14 2023 user.notice ucitrack: Setting up /etc/config/dhcp reload dependency on /etc/config/odhcpd
Thu Jan 5 06:28:15 2023 user.notice ucitrack: Setting up non-init /etc/config/fstab reload handler: /sbin/block mount
Thu Jan 5 06:28:15 2023 user.notice ucitrack: Setting up /etc/config/system reload trigger for non-procd /etc/init.d/led
Thu Jan 5 06:28:15 2023 user.notice ucitrack: Setting up /etc/config/system reload dependency on /etc/config/luci_statistics
Thu Jan 5 06:28:15 2023 user.notice ucitrack: Setting up /etc/config/system reload dependency on /etc/config/dhcp
Thu Jan 5 06:28:15 2023 daemon.notice procd: /etc/rc.d/S95done: net.ipv6.conf.all.disable_ipv6 = 1
Thu Jan 5 06:28:15 2023 daemon.notice procd: /etc/rc.d/S95done: net.ipv6.conf.default.disable_ipv6 = 1
Thu Jan 5 06:28:16 2023 kern.info kernel: [ 29.761362] mtk_soc_eth 1e100000.ethernet eth0: Link is Down
Thu Jan 5 06:28:16 2023 kern.info kernel: [ 29.776072] mtk_soc_eth 1e100000.ethernet eth0: configuring for fixed/rgmii link mode
Thu Jan 5 06:28:16 2023 kern.info kernel: [ 29.784253] mtk_soc_eth 1e100000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx
Thu Jan 5 06:28:16 2023 kern.info kernel: [ 29.792713] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
Thu Jan 5 06:28:16 2023 kern.info kernel: [ 29.800751] mt7530 mdio-bus:1f lan1: configuring for phy/gmii link mode
Thu Jan 5 06:28:16 2023 kern.info kernel: [ 29.807872] 8021q: adding VLAN 0 to HW filter on device lan1
Thu Jan 5 06:28:16 2023 kern.info kernel: [ 29.816882] br-lan: port 1(lan1) entered blocking state
Thu Jan 5 06:28:16 2023 kern.info kernel: [ 29.822170] br-lan: port 1(lan1) entered disabled state
Thu Jan 5 06:28:16 2023 kern.info kernel: [ 29.829123] device lan1 entered promiscuous mode
Thu Jan 5 06:28:16 2023 kern.info kernel: [ 29.834126] device eth0 entered promiscuous mode
Thu Jan 5 06:28:16 2023 daemon.notice netifd: Interface 'lan' is enabled
Thu Jan 5 06:28:16 2023 daemon.notice netifd: Interface 'lan' is setting up now
Thu Jan 5 06:28:16 2023 daemon.notice netifd: Interface 'lan' is now up
Thu Jan 5 06:28:16 2023 kern.info kernel: [ 29.867482] mt7530 mdio-bus:1f lan2: configuring for phy/gmii link mode
Thu Jan 5 06:28:16 2023 kern.info kernel: [ 29.874748] 8021q: adding VLAN 0 to HW filter on device lan2
Thu Jan 5 06:28:16 2023 kern.info kernel: [ 29.884724] br-lan: port 2(lan2) entered blocking state
Thu Jan 5 06:28:16 2023 kern.info kernel: [ 29.889966] br-lan: port 2(lan2) entered disabled state
Thu Jan 5 06:28:16 2023 kern.info kernel: [ 29.896755] device lan2 entered promiscuous mode
Thu Jan 5 06:28:16 2023 daemon.notice netifd: Interface 'EM7455' is setting up now
Thu Jan 5 06:28:16 2023 daemon.notice netifd: Interface 'loopback' is enabled
Thu Jan 5 06:28:16 2023 daemon.notice netifd: Interface 'loopback' is setting up now
Thu Jan 5 06:28:16 2023 daemon.notice netifd: Interface 'loopback' is now up
Thu Jan 5 06:28:16 2023 kern.info kernel: [ 29.924396] mt7530 mdio-bus:1f wan: configuring for phy/gmii link mode
Thu Jan 5 06:28:16 2023 kern.info kernel: [ 29.931578] 8021q: adding VLAN 0 to HW filter on device wan
Thu Jan 5 06:28:16 2023 daemon.notice netifd: Interface 'wan' is enabled
Thu Jan 5 06:28:16 2023 daemon.notice netifd: Interface 'wan6' is enabled
Thu Jan 5 06:28:16 2023 daemon.notice netifd: Interface 'wwan' is setting up now
Thu Jan 5 06:28:16 2023 daemon.notice netifd: Network device 'eth0' link is up
Thu Jan 5 06:28:16 2023 daemon.notice netifd: Network device 'lo' link is up
Thu Jan 5 06:28:16 2023 daemon.notice netifd: Interface 'loopback' has link connectivity
Thu Jan 5 06:28:16 2023 daemon.notice netifd: EM7455 (3406): ls: /net: No such file or directory
Thu Jan 5 06:28:16 2023 daemon.notice netifd: EM7455 (3406): The interface could not be found.
Thu Jan 5 06:28:16 2023 daemon.notice netifd: EM7455 (3480): Stopping network EM7455
Thu Jan 5 06:28:17 2023 daemon.notice netifd: EM7455 (3480): Command failed: ubus call network.interface notify_proto { "action": 0, "link-up": false, "keep": false, "interface": "EM7455" } (Permission denied)
Thu Jan 5 06:28:17 2023 daemon.notice netifd: Interface 'EM7455' is now down
Thu Jan 5 06:28:17 2023 user.notice firewall: Reloading firewall due to ifup of lan (br-lan)
Thu Jan 5 06:28:17 2023 daemon.info procd: - init complete -
Thu Jan 5 06:28:18 2023 daemon.err odhcpd[2912]: Failed to send to ff02::1%lan@br-lan (Network unreachable)
Thu Jan 5 06:28:18 2023 daemon.notice pppd[3779]: pppd 2.4.9 started by root, uid 0
Thu Jan 5 06:28:19 2023 local2.info chat[3790]: abort on (BUSY)
Thu Jan 5 06:28:19 2023 local2.info chat[3790]: abort on (NO CARRIER)
Thu Jan 5 06:28:19 2023 local2.info chat[3790]: abort on (ERROR)
Thu Jan 5 06:28:19 2023 local2.info chat[3790]: report (CONNECT)
Thu Jan 5 06:28:19 2023 local2.info chat[3790]: timeout set to 10 seconds
Thu Jan 5 06:28:19 2023 local2.info chat[3790]: send (AT&F^M)
Thu Jan 5 06:28:19 2023 local2.info chat[3790]: expect (OK)
Thu Jan 5 06:28:19 2023 local2.info chat[3790]: ^M
Thu Jan 5 06:28:19 2023 local2.info chat[3790]: OK
Thu Jan 5 06:28:19 2023 local2.info chat[3790]: -- got it
Thu Jan 5 06:28:19 2023 local2.info chat[3790]: send (ATE1^M)
Thu Jan 5 06:28:19 2023 kern.info kernel: [ 33.298054] mt7530 mdio-bus:1f lan2: Link is Up - 1Gbps/Full - flow control rx/tx
Thu Jan 5 06:28:19 2023 kern.info kernel: [ 33.305755] br-lan: port 2(lan2) entered blocking state
Thu Jan 5 06:28:19 2023 kern.info kernel: [ 33.310980] br-lan: port 2(lan2) entered forwarding state
Thu Jan 5 06:28:19 2023 daemon.notice netifd: Network device 'lan2' link is up
Thu Jan 5 06:28:19 2023 daemon.notice netifd: bridge 'br-lan' link is up
Thu Jan 5 06:28:19 2023 daemon.notice netifd: Interface 'lan' has link connectivity
Thu Jan 5 06:28:20 2023 local2.info chat[3790]: expect (OK)
Thu Jan 5 06:28:20 2023 local2.info chat[3790]: ^M
Thu Jan 5 06:28:20 2023 local2.info chat[3790]: ^M
Thu Jan 5 06:28:20 2023 local2.info chat[3790]: OK
Thu Jan 5 06:28:20 2023 local2.info chat[3790]: -- got it
Thu Jan 5 06:28:20 2023 local2.info chat[3790]: send (AT+CGDCONT=1,"IP","m-wap"^M)
Thu Jan 5 06:28:20 2023 local2.info chat[3790]: timeout set to 30 seconds
Thu Jan 5 06:28:20 2023 local2.info chat[3790]: expect (OK)
Thu Jan 5 06:28:20 2023 local2.info chat[3790]: ^M
Thu Jan 5 06:28:20 2023 local2.info chat[3790]: ^M
Thu Jan 5 06:28:20 2023 local2.info chat[3790]: OK
Thu Jan 5 06:28:20 2023 local2.info chat[3790]: -- got it
Thu Jan 5 06:28:20 2023 local2.info chat[3790]: send (ATD*99***1#^M)
Thu Jan 5 06:28:20 2023 local2.info chat[3790]: expect (CONNECT)
Thu Jan 5 06:28:20 2023 local2.info chat[3790]: ^M
Thu Jan 5 06:28:20 2023 daemon.err odhcpd[2912]: Failed to send to ff02::1%lan@br-lan (Network unreachable)
Thu Jan 5 06:28:21 2023 daemon.info dnsmasq[1]: exiting on receipt of SIGTERM
Thu Jan 5 06:28:23 2023 daemon.info dnsmasq[1]: started, version 2.86 cachesize 150
Thu Jan 5 06:28:23 2023 daemon.info dnsmasq[1]: DNS service limited to local subnets
Thu Jan 5 06:28:23 2023 daemon.info dnsmasq[1]: compile time options: IPv6 GNU-getopt no-DBus UBus no-i18n no-IDN DHCP no-DHCPv6 no-Lua TFTP no-conntrack no-ipset no-auth no-cryptohash no-DNSSEC no-ID loop-detect inotify dumpfile
Thu Jan 5 06:28:23 2023 daemon.info dnsmasq[1]: UBus support enabled: connected to system bus
Thu Jan 5 06:28:23 2023 daemon.info dnsmasq-dhcp[1]: DHCP, IP range 192.168.1.100 -- 192.168.1.249, lease time 12h
Thu Jan 5 06:28:23 2023 daemon.info dnsmasq[1]: using only locally-known addresses for test
Thu Jan 5 06:28:23 2023 daemon.info dnsmasq[1]: using only locally-known addresses for onion
Thu Jan 5 06:28:23 2023 daemon.info dnsmasq[1]: using only locally-known addresses for localhost
Thu Jan 5 06:28:23 2023 daemon.info dnsmasq[1]: using only locally-known addresses for local
Thu Jan 5 06:28:23 2023 daemon.info dnsmasq[1]: using only locally-known addresses for invalid
Thu Jan 5 06:28:23 2023 daemon.info dnsmasq[1]: using only locally-known addresses for bind
Thu Jan 5 06:28:23 2023 daemon.info dnsmasq[1]: using only locally-known addresses for lan
Thu Jan 5 06:28:23 2023 daemon.warn dnsmasq[1]: no servers found in /tmp/resolv.conf.d/resolv.conf.auto, will retry
Thu Jan 5 06:28:23 2023 daemon.info dnsmasq[1]: read /etc/hosts - 4 addresses
Thu Jan 5 06:28:23 2023 daemon.info dnsmasq[1]: read /tmp/hosts/dhcp.cfg01411c - 1 addresses
Thu Jan 5 06:28:23 2023 daemon.info dnsmasq-dhcp[1]: read /etc/ethers - 0 addresses
Thu Jan 5 06:28:23 2023 daemon.info dnsmasq[1]: read /etc/hosts - 4 addresses
Thu Jan 5 06:28:23 2023 daemon.info dnsmasq[1]: read /tmp/hosts/dhcp.cfg01411c - 1 addresses
Thu Jan 5 06:28:23 2023 daemon.info dnsmasq-dhcp[1]: read /etc/ethers - 0 addresses
Thu Jan 5 06:28:27 2023 daemon.info dnsmasq-dhcp[1]: DHCPDISCOVER(br-lan) d8:5e:d3:96:cd:de
Thu Jan 5 06:28:27 2023 daemon.info dnsmasq-dhcp[1]: DHCPOFFER(br-lan) 192.168.1.196 d8:5e:d3:96:cd:de
Thu Jan 5 06:28:27 2023 daemon.info dnsmasq-dhcp[1]: DHCPREQUEST(br-lan) 192.168.1.196 d8:5e:d3:96:cd:de
Thu Jan 5 06:28:27 2023 daemon.info dnsmasq-dhcp[1]: DHCPACK(br-lan) 192.168.1.196 d8:5e:d3:96:cd:de hoanglong
Thu Jan 5 06:28:36 2023 daemon.err odhcpd[2912]: Failed to send to ff02::1%lan@br-lan (Network unreachable)
Thu Jan 5 06:28:50 2023 local2.info chat[3790]: alarm
Thu Jan 5 06:28:50 2023 local2.info chat[3790]: Failed
Thu Jan 5 06:28:50 2023 daemon.err pppd[3779]: Connect script failed
Thu Jan 5 06:28:51 2023 daemon.info pppd[3779]: Exit.
Thu Jan 5 06:28:51 2023 daemon.notice netifd: Interface 'wwan' is now down
Thu Jan 5 06:28:51 2023 daemon.notice netifd: Interface 'wwan' is setting up now
Thu Jan 5 06:28:52 2023 daemon.err odhcpd[2912]: Failed to send to ff02::1%lan@br-lan (Network unreachable)
Thu Jan 5 06:28:53 2023 daemon.notice pppd[4241]: pppd 2.4.9 started by root, uid 0
Thu Jan 5 06:28:54 2023 local2.info chat[4242]: abort on (BUSY)
Thu Jan 5 06:28:54 2023 local2.info chat[4242]: abort on (NO CARRIER)
Thu Jan 5 06:28:54 2023 local2.info chat[4242]: abort on (ERROR)
Thu Jan 5 06:28:54 2023 local2.info chat[4242]: report (CONNECT)
Thu Jan 5 06:28:54 2023 local2.info chat[4242]: timeout set to 10 seconds
Thu Jan 5 06:28:54 2023 local2.info chat[4242]: send (AT&F^M)
Thu Jan 5 06:28:54 2023 local2.info chat[4242]: expect (OK)
Thu Jan 5 06:28:54 2023 local2.info chat[4242]: ^M
Thu Jan 5 06:28:54 2023 local2.info chat[4242]: OK
Thu Jan 5 06:28:54 2023 local2.info chat[4242]: -- got it
Thu Jan 5 06:28:54 2023 local2.info chat[4242]: send (ATE1^M)
Thu Jan 5 06:28:54 2023 local2.info chat[4242]: expect (OK)
Thu Jan 5 06:28:54 2023 local2.info chat[4242]: ^M
Thu Jan 5 06:28:54 2023 local2.info chat[4242]: ^M
Thu Jan 5 06:28:54 2023 local2.info chat[4242]: OK
Thu Jan 5 06:28:54 2023 local2.info chat[4242]: -- got it
Thu Jan 5 06:28:54 2023 local2.info chat[4242]: send (AT+CGDCONT=1,"IP","m-wap"^M)
Thu Jan 5 06:28:55 2023 local2.info chat[4242]: timeout set to 30 seconds
Thu Jan 5 06:28:55 2023 local2.info chat[4242]: expect (OK)
Thu Jan 5 06:28:55 2023 local2.info chat[4242]: ^M
Thu Jan 5 06:28:55 2023 local2.info chat[4242]: ^M
Thu Jan 5 06:28:55 2023 local2.info chat[4242]: OK
Thu Jan 5 06:28:55 2023 local2.info chat[4242]: -- got it
Thu Jan 5 06:28:55 2023 local2.info chat[4242]: send (ATD*99***1#^M)
Thu Jan 5 06:28:55 2023 local2.info chat[4242]: expect (CONNECT)
Thu Jan 5 06:28:55 2023 local2.info chat[4242]: ^M
Thu Jan 5 06:28:56 2023 user.info : luci: accepted login on / for root from 192.168.1.196
Thu Jan 5 06:29:08 2023 daemon.err odhcpd[2912]: Failed to send to ff02::1%lan@br-lan (Network unreachable)