# EM7455 qcserial+GobiNet **URL:** \ **Category:** IoT Modules\ **Created:** [December 22, 2022, 7:24am UTC](https://forum.sierrawireless.com/t/em7455-qcserial-gobinet/28623 "2022-12-22T07:24:28Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![qm8yqv\_7pwkd4cszca7o](https://avatars.discourse-cdn.com/v4/letter/q/c5a1d2/32.png) [@qm8yqv\_7pwkd4cszca7o](https://forum.sierrawireless.com/u/qm8yqv_7pwkd4cszca7o)\ **Post date:** [December 22, 2022, 7:24am UTC](https://forum.sierrawireless.com/t/em7455-qcserial-gobinet/28623/1 "2022-12-22T07:24:29Z")
i’ve skimmed the Application Developers’ Guide, it didnt say anything about GobiNet requiring GobiSerial to function. can GobiNet run standalone in Full API, or does it need GobiSerial? the guide said GobiNet was using /dev/qcqmiX. i have: ```auto |__ Port 6: Dev 6, If 2, Class=Vendor Specific Class, Driver=qcserial, 480M |__ Port 6: Dev 6, If 0, Class=Vendor Specific Class, Driver=qcserial, 480M |__ Port 6: Dev 6, If 10, Class=Vendor Specific Class, Driver=GobiNet, 480M |__ Port 6: Dev 6, If 3, Class=Vendor Specific Class, Driver=qcserial, 480M |__ Port 6: Dev 6, If 1, Class=Vendor Specific Class, Driver=usbfs, 480M |__ Port 6: Dev 6, If 8, Class=Vendor Specific Class, Driver=GobiNet, 480M ``` GobiNet is loaded with: ```auto modprobe -vv GobiNet [debug=Y],[iRAWIPEnable=1],[iIPAlias=0],[iQMAPEnable=1] ``` i cant get an address with udhcpc -i wwan0 (thought GobiNet is on eth0, but thats another thing) GobiNet is compiled with: ```auto RAWIP := 0 ifeq ($(RAWIP), 1) ccflags-y:=-DDATA_MODE_RP endif ``` and i load the module with flags: ```auto GobiNet [debug=Y],[iRAWIPEnable=1],[iIPAlias=0],[iQMAPEnable=1] ``` the flags should be good enought, right? or do i have to complie with RAWIP:=1? and do i have to have GobiSerial? ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [December 22, 2022, 7:49am UTC](https://forum.sierrawireless.com/t/em7455-qcserial-gobinet/28623/2 "2022-12-22T07:49:24Z")
I remember i compiled with rawip flag equal to one, you can give a try Also you need to type at!scact=1,1 to start data establishment first ---
**Author:** ![qm8yqv\_7pwkd4cszca7o](https://avatars.discourse-cdn.com/v4/letter/q/c5a1d2/32.png) [@qm8yqv\_7pwkd4cszca7o](https://forum.sierrawireless.com/u/qm8yqv_7pwkd4cszca7o)\ **Post date:** [December 22, 2022, 8:01am UTC](https://forum.sierrawireless.com/t/em7455-qcserial-gobinet/28623/3 "2022-12-22T08:01:32Z")
ok, ill try that. p.s. yea, i used !SCACT=1 ---
**Author:** ![qm8yqv\_7pwkd4cszca7o](https://avatars.discourse-cdn.com/v4/letter/q/c5a1d2/32.png) [@qm8yqv\_7pwkd4cszca7o](https://forum.sierrawireless.com/u/qm8yqv_7pwkd4cszca7o)\ **Post date:** [December 22, 2022, 12:22pm UTC](https://forum.sierrawireless.com/t/em7455-qcserial-gobinet/28623/4 "2022-12-22T12:22:43Z")
i recompiled with: ```auto RAWIP := 1 ``` module flags ```auto Module: GobiNet Parameter: debug --> 0 Parameter: iAutoIPAddress --> 0 Parameter: iEthSrcMACNonZero --> 0 Parameter: iIPAlias --> 0 Parameter: iMaxQMUXSupported --> -1 Parameter: interruptible --> 1 Parameter: iQMAPEnable --> 1 Parameter: iRAWIPEnable --> 1 Parameter: iTEEnable --> -1 Parameter: qmi_service_awake_timeout --> -1 Parameter: qos_debug --> 0 Parameter: resume_delay_ms --> 1000 Parameter: rt_default_priority --> -1 Parameter: rt_local_priority --> -1 Parameter: rt_main_priority --> -1 Parameter: txQueueLength --> 100 Parameter: wakelock_debug --> 0 Parameter: wakelock_timeout --> -1 ``` it gets ip address now on wwan, for some reason not showing it: ```auto 46: wwan0: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether de:ad:be:ef:ff:ff brd ff:ff:ff:ff:ff:ff permaddr de:ad:be:ef:ff:ff ``` problem was, that the flags passed through modprobe, were not setting GobiNet parameters: ```auto modprobe -vv GobiNet [debug=Y],[iRAWIPEnable=1],[iIPAlias=0],[iQMAPEnable=1] ``` other flags were set with echo, e.g.: ```auto echo 0 > /sys/module/GobiNet/parameters/iIPAlias ``` p.s. qcserial is working fine next to GobiNet ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [December 22, 2022, 12:42pm UTC](https://forum.sierrawireless.com/t/em7455-qcserial-gobinet/28623/5 "2022-12-22T12:42:37Z")
I don’t see problem with Ubuntu 18: ```auto [149.477522] usb 4-1: new SuperSpeed USB device number 3 using xhci_hcd [149.499009] usb 4-1: config 1 has an invalid interface number: 8 but max is 3 [149.499012] usb 4-1: config 1 has no interface number 1 [149.499943] usb 4-1: New USB device found, idVendor=1199, idProduct=9071 [149.499946] usb 4-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [149.499947] usb 4-1: Product: MC7455 [149.499949] usb 4-1: Manufacturer: Sierra Wireless, Incorporated [149.499950] usb 4-1: SerialNumber: LQ53010055020202 [149.853426] GobiNet: loading out-of-tree module taints kernel. [149.853613] GobiNet: module verification failed: signature and/or required key missing - tainting kernel [149.854798] GobiNet: 2018-03-22/SWI_2.51 [149.871638] GobiNet 4-1:1.8 eth0: register 'GobiNet' at usb-0000:03:00.0-1, GobiNet Ethernet Device, b2:50:99:0f:da:5b [149.876716] USB Speed : USB 3.0 [149.876756] usbcore: registered new interface driver GobiNet [149.972641] usbcore: registered new interface driver usbserial [149.977317] usbcore: registered new interface driver usbserial_generic [149.977445] usbserial: USB Serial support registered for generic [149.995190] usbcore: registered new interface driver GobiSerial [149.995201] usbserial: USB Serial support registered for GobiSerial [149.995887] GobiSerial 4-1:1.0: GobiSerial converter detected [149.996012] usb 4-1: GobiSerial converter now attached to ttyUSB0 [149.997590] GobiSerial 4-1:1.2: GobiSerial converter detected [149.997723] usb 4-1: GobiSerial converter now attached to ttyUSB1 [150.001066] GobiSerial 4-1:1.3: GobiSerial converter detected [150.017193] usb 4-1: GobiSerial converter now attached to ttyUSB2 [150.020713] GobiSerial: 2018-04-25/SWI_2.32:GobiSerial [150.340456] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready [150.342445] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready [156.579680] creating qcqmi0 [156.579921] RawIP mode owner@ubuntu:~$ modinfo GobiNet filename: /lib/modules/4.13.0-32-generic/kernel/drivers/net/usb/GobiNet.ko license: Dual BSD/GPL description: GobiNet author: Qualcomm Innovation Center version: 2018-03-22/SWI_2.51 srcversion: EFC1C12C109F33360514C70 alias: usb:v1199p9110d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v1199p9102d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v1199p9100d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v1199p90C1d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v1199p90B1d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v1199p9091d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v1199p9070d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v1199p9061d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v1199p9056d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v1199p9055d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v1199p9054d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v1199p9053d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v1199p9051d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v1199p9041d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v1199p68C0d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v1199p9071d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v03F0p371Dd*dc*dsc*dp*ic*isc*ip*in* alias: usb:v1199p9019d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v1199p9015d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v1199p9013d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v1199p9011d*dc*dsc*dp*ic*isc*ip*in* alias: usb:v05C6p920Dd*dc*dsc*dp*ic*isc*ip*in* alias: usb:v1199p68A2d*dc*dsc*dp*ic*isc*ip*in* depends: usbnet name: GobiNet vermagic: 4.13.0-32-generic SMP mod_unload parm: debug:Debuging enabled or not (int) parm: qos_debug:QoS Debuging enabled or not (int) parm: interruptible:Listen for and return on user interrupt (int) parm: txQueueLength:Number of IP packets which may be queued up for transmit (int) parm: iTEEnable:-1 : Ignore TE flow Control, 0 : TE Flow Control disabled, 1 : TE Flow Control enabled (int) parm: iRAWIPEnable:RAWIP enabled or not (int) parm: iQMAPEnable:-1: Auto, 0 : QMAP disabled, 1 : QMAP enabled (int) parm: iMaxQMUXSupported:-1: Auto, Max QMUX instance support (int) parm: iIPAlias:0 = virtual adapter , 1 (default) = IP alias (int) owner@ubuntu:~$ ifconfig eth0 eth0: flags=4227 mtu 1500 ether b2:50:99:0f:da:08 txqueuelen 1000 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 owner@ubuntu:~$ ifconfig ens33: flags=4163 mtu 1500 inet 192.168.174.157 netmask 255.255.255.0 broadcast 192.168.174.255 inet6 fe80::cbdc:d25c:a219:2c9a prefixlen 64 scopeid 0x20 ether 00:0c:29:b2:68:f2 txqueuelen 1000 (Ethernet) RX packets 278308 bytes 418891503 (418.8 MB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 92717 bytes 5672017 (5.6 MB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 eth0: flags=4227 mtu 1500 ether b2:50:99:0f:da:08 txqueuelen 1000 (Ethernet) RX packets 0 bytes 0 (0.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 lo: flags=73 mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10 loop txqueuelen 1000 (Local Loopback) RX packets 261 bytes 23528 (23.5 KB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 261 bytes 23528 (23.5 KB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 owner@ubuntu:~$ sudo udhcpc -i eth0 [sudo] password for owner: udhcpc: started, v1.27.2 udhcpc: sending discover udhcpc: sending select for 10.134.93.246 udhcpc: lease of 10.134.93.246 obtained, lease time 7200 ************** at!scact=1,1 OK ati3 Manufacturer: Sierra Wireless, Incorporated Model: MC7455 Revision: SWI9X30C_02.33.03.00 r8209 CARMD-EV-FRMWR2 2019/08/28 20:59:30 MEID: 35907206000350 ESN: 12800003752, 80000EA8 IMEI: 359072060012345 IMEI SV: 20 FSN: LQ530100512345 +GCAP: +CGSM OK at!gstatus? !GSTATUS: Current Time: 536 Temperature: 24 Reset Counter: 3 Mode: ONLINE System mode: LTE PS state: Attached LTE band: B7 LTE bw: 20 MHz LTE Rx chan: 3150 LTE Tx chan: 21150 LTE CA state: INACTIVE LTE Scell band:B3 LTE Scell bw:20 MHz LTE Scell chan:1400 EMM state: Registered Normal Service RRC state: RRC Connected IMS reg state: No Srv PCC RxM RSSI: -67 RSRP (dBm): -98 PCC RxD RSSI: -95 RSRP (dBm): -133 SCC RxM RSSI: -71 RSRP (dBm): -88 SCC RxD RSSI: -107 RSRP (dBm): -136 Tx Power: -- TAC: 0652 (1618) RSRQ (dB): -11.7 Cell ID: 01E5110D (31789325) SINR (dB): 2.8 OK ``` ---
**Author:** ![qm8yqv\_7pwkd4cszca7o](https://avatars.discourse-cdn.com/v4/letter/q/c5a1d2/32.png) [@qm8yqv\_7pwkd4cszca7o](https://forum.sierrawireless.com/u/qm8yqv_7pwkd4cszca7o)\ **Post date:** [December 31, 2022, 3:16pm UTC](https://forum.sierrawireless.com/t/em7455-qcserial-gobinet/28623/6 "2022-12-31T15:16:46Z")
when GobiUSBNet.c was modified, forgot to add recovery 9078, > [819.761627] GobiNet: loading out-of-tree module taints kernel. > [819.761803] GobiNet: module verification failed: signature and/or required key missing - tainting kernel > [819.765042] GobiNet: 2020-08-17/SWI\_2.64 > [819.766794] GobiNet 1-6:1.8 wwan0: register ‘GobiNet’ at usb-0000:00:14.0-6, GobiNet Ethernet Device, de:ad:be:ef:ff:ff > [819.767717] USB Speed : USB 2.0 > [819.767760] usbcore: registered new interface driver GobiNet > [824.076374] creating qcqmi0 > [824.076484] RawIP mode > filename: /lib/modules/5.10.0-17-amd64/updates/dkms/GobiNet.ko > license: Dual BSD/GPL > description: GobiNet > author: Qualcomm Innovation Center > version: 2020-08-17/SWI\_2.64 > srcversion: > alias: usb:v1199p9081d_dc_dsc_dp_ic_isc_ip_in_ > alias: usb:v1199p9102d_dc_dsc_dp_ic_isc_ip_in_ > alias: usb:v1199p9100d_dc_dsc_dp_ic_isc_ip_in_ > alias: usb:v1199p90C1d_dc_dsc_dp_ic_isc_ip_in_ > alias: usb:v1199p90B1d_dc_dsc_dp_ic_isc_ip_in_ > alias: usb:v1199p9091d_dc_dsc_dp_ic_isc_ip_in_ > alias: usb:v1199p9078d_dc_dsc_dp_ic_isc_ip_in_ // ← here forgot to add > alias: usb:v1199p9070d_dc_dsc_dp_ic_isc_ip_in_ > alias: usb:v1199p9061d_dc_dsc_dp_ic_isc_ip_in_ > alias: usb:v1199p9056d_dc_dsc_dp_ic_isc_ip_in_ > alias: usb:v1199p9055d_dc_dsc_dp_ic_isc_ip_in_ > alias: usb:v1199p9054d_dc_dsc_dp_ic_isc_ip_in_ > alias: usb:v1199p9053d_dc_dsc_dp_ic_isc_ip_in_ > alias: usb:v1199p9051d_dc_dsc_dp_ic_isc_ip_in_ > alias: usb:v1199p9041d_dc_dsc_dp_ic_isc_ip_in_ > alias: usb:v1199p68C0d_dc_dsc_dp_ic_isc_ip_in_ > alias: usb:v1199p9079d_dc_dsc_dp_ic_isc_ip_in_// ← added this, no ip showing without 9078 > alias: usb:v1199p9071d_dc_dsc_dp_ic_isc_ip_in_ > alias: usb:v1199p9019d_dc_dsc_dp_ic_isc_ip_in_ > alias: usb:v1199p9015d_dc_dsc_dp_ic_isc_ip_in_ > alias: usb:v1199p9013d_dc_dsc_dp_ic_isc_ip_in_ > alias: usb:v1199p9011d_dc_dsc_dp_ic_isc_ip_in_ > alias: usb:v05C6p920Dd_dc_dsc_dp_ic_isc_ip_in_ > alias: usb:v1199p68A2d_dc_dsc_dp_ic_isc_ip_in_ > depends: usbnet,usbcore > retpoline: Y > name: GobiNet > vermagic: 5.10.0-17-amd64 SMP mod\_unload modversions > parm: debug:Debuging enabled or not (int) > parm: qos\_debug:QoS Debuging enabled or not (int) > parm: interruptible:Listen for and return on user interrupt (int) > parm: txQueueLength:Number of IP packets which may be queued up for transmit (int) > parm: iTEEnable:-1 : Ignore TE flow Control, 0 : TE Flow Control disabled, 1 : TE Flow Control enabled (int) > parm: iRAWIPEnable:RAWIP enabled or not (int) > parm: iQMAPEnable:-1: Auto, 0 : QMAP disabled, 1 : QMAP enabled (int) > parm: iMaxQMUXSupported:-1: Auto, Max QMUX instance support (int) > parm: iIPAlias:0 = virtual adapter , 1 (default) = IP alias (int) > parm: iEthSrcMACNonZero:0(default) = Ethernet Header Source Address : Zeros , 1 = Ethernet Header Source Address: Non-zero (int) > parm: wakelock\_debug:Wake lock debug enabled or not (int) > parm: iAutoIPAddress:0(default) = Manual assgin IP address to adaptor : Zeros , 1 = Get IP address via QMI (int) > parm: wakelock\_timeout:-1 : 0 seconds, Number of second wakelock will be released after resume (int) > parm: resume\_delay\_ms:1000(default) : Delay before resume in millisecond (int) > parm: qmi\_service\_awake\_timeout:-1 : 8 seconds, Number of second wakelock will be released after selected QMI servcie request send (int) > parm: rt\_local\_priority:-1(default) : ROUTE\_TABLE\_LOCAL\_PRIORITY: 0, local lookup priority number (int) > parm: rt\_main\_priority:-1(default) : ROUTE\_TABLE\_MAIN\_PRIORITY: 1, main lookup priority number (int) > parm: rt\_default\_priority:-1(default) : ROUTE\_TABLE\_DEFAULT\_PRIORITY: 32767, default lookup priority number (int) so it worked, ip was fine, but was still a dead end, as in- wanted the private local address, not one assigned by the network. was solved by changing android gadget parameters. will make a new post this: [EM7455 exposing LAN interface](https://forum.sierrawireless.com/t/em7455-exposing-lan-interface/28665)