Table of Contents

Troubleshooting GSM interface issues

This section explains how to issue the ppp interface on kerOS products.

If you see that kind of error in loop in /var/log/messages: 

Oct 19 16:27:16 klk-wifc-01008B daemon.warn ofonod[893]: Modem channel disconnected
Oct 19 16:27:17 klk-wifc-01008B daemon.err connmand[860]: Failed to change property: /huawei_0/context1 org.ofono.ConnectionContext.Active: org.ofono.Error.Failed Operation failed
Oct 19 16:27:17 klk-wifc-01008B daemon.warn connmand[860]: Skipping disconnect of /huawei_0/context1, network is connecting.
Oct 19 16:27:17 klk-wifc-01008B daemon.warn ofonod[893]: Modem channel disconnected

  1. Use the gsmdiag.py tool to check first if your SIM card or HUAWEI USB key is correctly inserted into your system
  2. Check your provisioning file in /etc/network/ofono: check your APN, pin code, MNC and MCC.
  3. Reset the ofono component by typing the following command: /etc/init.d/ofono reset and watch for errors in /var/log/messages file.
  4. If the issue remains, reboot the gateway

Example of a good insertion of SIM card and HUAWEI key in the system: 

root@klk-wifc-01008B:~ # [ 1782.038313] usb 1-1: new high-speed USB device number 4 using ci_hdrc
[ 1782.190019] usb 1-1: New USB device found, idVendor=12d1, idProduct=1f01
[ 1782.196755] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 1782.203951] usb 1-1: Product: HUAWEI_MOBILE
[ 1782.208143] usb 1-1: Manufacturer: HUAWEI_MOBILE
[ 1782.212790] usb 1-1: SerialNumber: 0123456789ABCDEF
[ 1782.254198] usb-storage 1-1:1.0: USB Mass Storage device detected
[ 1782.261311] scsi host1: usb-storage 1-1:1.0
[ 1783.050857] usb 1-1: USB disconnect, device number 4
[ 1783.708169] usb 1-1: new high-speed USB device number 5 using ci_hdrc
[ 1783.859890] usb 1-1: New USB device found, idVendor=12d1, idProduct=155e
[ 1783.866626] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 1783.873827] usb 1-1: Product: HUAWEI_MOBILE
[ 1783.878030] usb 1-1: Manufacturer: HUAWEI_MOBILE
[ 1783.926052] option 1-1:1.0: GSM modem (1-port) converter detected
[ 1783.944967] usb 1-1: GSM modem (1-port) converter now attached to ttyUSB0
[ 1783.961167] option 1-1:1.1: GSM modem (1-port) converter detected
[ 1783.991777] usb 1-1: GSM modem (1-port) converter now attached to ttyUSB1
[ 1784.014171] option 1-1:1.2: GSM modem (1-port) converter detected
[ 1784.054636] usb 1-1: GSM modem (1-port) converter now attached to ttyUSB2
[ 1784.140155] cdc_ncm 1-1:1.3: MAC-Address: 00:1e:10:1f:00:00
[ 1784.145749] cdc_ncm 1-1:1.3: setting rx_max = 16384
[ 1784.216120] cdc_ncm 1-1:1.3 wwan0: register 'cdc_ncm' at usb-ci_hdrc.0-1, Mobile Broadband Network Device, 00:1e:10:1f:00:00

Example of a good result given by the gsmdiag.py tool: 

root@klk-wifc-01008B:~ # gsmdiag.py
Diagnostic written in /tmp/gsmdiag.txt
root@klk-wifc-01008B:~ # cat /tmp/gsmdiag.txt
Number of modems: 1
[Modem:/huawei_0]
  Powered:1
  Online:1
  Manufacturer:huawei
  Model:E3372
  Revision:22.200.03.00.1134
  [SimProps]
    Present:1
    CardIdentifier:89331042150325590509
    SubscriberIdentity:208104290505724
    LockedPins:dbus.Array([], signature=dbus.Signature('s'), variant_level=1)
    PinRequired:none
  [NetworkRegistrationProps]
    Status:registered
    MobileCountryCode:208
    MobileNetworkCode:10
    Name:F SFR
    Strength:0
  [ConnectionContexts]
    [/huawei_0/context1]
      Name:Internet
      Active:0
      Type:internet
      Protocol:ip
      AccessPointName:websfr
      Username:
      Password:
      AuthenticationMethod:chap

Example of a bad result given by the gsmdiag.py tool: 

root@klk-wifc-01008B:~ # gsmdiag.py
Diagnostic written in /tmp/gsmdiag.txt
root@klk-wifc-01008B:~ # cat /tmp/gsmdiag.txt
Number of modems: 1
[Modem:/huawei_0]
  Powered:1
  Online:1
  Manufacturer:huawei
  Model:E3372
  Revision:22.200.03.00.1134
  [SimProps]
    Present:1
    CardIdentifier:89331042150325590509
    SubscriberIdentity:208104290505724
    LockedPins:dbus.Array([], signature=dbus.Signature('s'), variant_level=1)
    PinRequired:none
  [NetworkRegistrationProps]
    Status:searching
    MobileCountryCode: property does not exist
    MobileNetworkCode: property does not exist
    Name:
    Strength: property does not exist
  Error: Not attached to GSM network (antenna problem?)

Example of a correct provisioning file: 

root@klk-wifc-01008B:~ # cat /etc/network/ofono/provisioning
# Syntax:
#[operator:MCC,MNC]
#internet.AccessPointName=APN => only mandatory field
#internet.Username=myUsername
#internet.Password=myPassword
#internet.AuthenticationMethod=[chap, pap] => default is chap
#internet.Protocol=[ip, ipv6, dual] => default is ip
#
#[sim:ICCID]
#pin=XXXX => SIM PIN of SIM identified by ICCID
#phone=XXXX => PH-SIM PIN of SIM identified by ICCID
#firstphone=XXXX => PH-FSIM PIN of SIM identified by ICCID
#network=XXXX => PH-NET PIN of SIM identified by ICCID
#netsub=XXXX => PH-NETSUB PIN of SIM identified by ICCID
#service=XXX => PH-SP PIN of SIM identified by ICCID
#corp=XXXX => PH-CORP PIN of SIM identified by ICCID
#
[sim]
pin=0000
#phone=XXXX => default PH-SIM PIN
#firstphone=XXXX => default PH-FSIM PIN
#network=XXXX => default PH-NET PIN
#netsub=XXXX => default PH-NETSUB PIN
#service=XXX => default PH-SP PIN
#corp=XXXX => default PH-CORP PIN

# Orange
[operator:208,01]
internet.AccessPointName=orange

# SFR
[operator:208,10]
internet.AccessPointName=m2minternet