No signal on EM7455 with EM Dev KIT (6000647)

IoT Modules
1

I am trying to use the EM7455 module with EM Dev KIT (6000647)
https://www.digikey.com/en/products/detail/sierra-wireless/EM-DEV-KIT_6000647/6565786

Module gets detected but there is no signal. I have connected both antennas and a working SIM.IMG_20210303_182640042|481x499

How do I make it work with the dev kit?

AT+CSQ
+CSQ: 99,99

OK

AT!PCINFO?
State: Online
LPM voters - Temp:0, Volt:0, User:0, W_DISABLE:0, IMSWITCH:0, BIOS:0, LWM2M:0, OMADM:0, FOTA:0
LPM persistence - None

OK
AT!GSTATUS?
!GSTATUS:
Current Time: 1445 Temperature: 22
Reset Counter: 2 Mode: ONLINE
System mode: LTE PS state: Not attached
LTE band: No band LTE bw: Unknown
LTE Rx chan: 0 LTE Tx chan: 4294967295
LTE CA state: ACTIVE LTE Scell band:B36
LTE Scell bw:Unknown LTE Scell chan:0
EMM state: Deregistered No Cell
RRC state: RRC Idle
IMS reg state: No Srv

PCC RxM RSSI: 0 RSRP (dBm): 0
PCC RxD RSSI: 0 RSRP (dBm): 0
SCC RxM RSSI: 0 RSRP (dBm): 0
SCC RxD RSSI: 0 RSRP (dBm): 0
Tx Power: 0 TAC: 0001 (1)
RSRQ (dB): 0.0 Cell ID: 048CA490 (76326032)
SINR (dB): 0

OK
AT+COPS?
+COPS: 0

OK
AT!IMAGE?
TYPE SLOT STATUS LRU FAILURES UNIQUE_ID BUILD_ID
FW 1 GOOD 28 0 0 ?? 02.24.05.06?
FW 2 GOOD 17 0 0 ?? 02.24.03.00?
FW 3 GOOD 27 0 0 ?? 02.33.03.00?
FW 4 GOOD 19 0 0 ?? 02.32.11.00?
Max FW images: 4
Active FW image is at slot 1

TYPE SLOT STATUS LRU FAILURES UNIQUE_ID BUILD_ID
PRI FF GOOD 0 0 0 002.027_000 02.24.05.06_ATT
PRI FF GOOD 0 0 0 002.026_000 02.24.05.06_GENERIC
PRI FF GOOD 0 0 0 002.022_000 02.24.03.00_SPRINT
PRI FF GOOD 0 0 0 001.000_000 00.00.00.00_OEMPRI918
PRI FF GOOD 0 0 0 002.079_001 02.33.03.00_VERIZON
Max PRI images: 50

OK
AT!IMPREF?
!IMPREF:
preferred fw version: 02.24.05.06
preferred carrier name: GENERIC
preferred config name: GENERIC_002.026_000
current fw version: 02.24.05.06
current carrier name: GENERIC
current config name: GENERIC_002.026_000

OK
ATI
Manufacturer: Sierra Wireless, Incorporated
Model: EM7455
Revision: SWI9X30C_02.24.05.06 r7040 CARMD-EV-FRMWR2 2017/05/19 06:23:09
MEID: 35907306528090
IMEI: 359073065280905
IMEI SV: 12
FSN: LF942404500210
+GCAP: +CGSM

OK

2

AT!GETBAND?
!GETBAND: No Service

OK
AT+CGDCONT?
+CGDCONT: 1,“IPV4V6”,"",“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0

OK

AT^SYSCONFIG?
^SYSCONFIG: 2,0,1,2

OK
AT!PCOFFEN?
2

===================

3

Is there any reference document for setting up EM Dev Kit?

4

I have checked it with the Open source driver (QMI WWAN) as well as with the Sierra Wireless Gobi driver.
There is no signal in both cases.

5

there is no LTE band.
Have you checked AT!BAND?

6

AT!BAND?
Index, Name, GW Band Mask L Band Mask TDS Band Mask
09, LTE ALL, 0000000000000000 00000100330818DF 0000000000000000

OK

7

Modem-manager logs

sudo service ModemManager  start
Mar  3 19:14:14 U18 systemd[1]: Starting Modem Manager...
Mar  3 19:14:14 U18 ModemManager[22528]: <info>  ModemManager (version 1.10.0) starting in system bus...
Mar  3 19:14:14 U18 systemd[1]: Started Modem Manager.
ak@U18:~$ Mar  3 19:14:14 U18 NetworkManager[1032]: <info>  [1614827654.6777] modem-manager: ModemManager now available
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0] Opening device with flags 'version-info, proxy'...
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0] loaded driver of cdc-wdm port: qmi_wwan
Mar  3 19:14:16 U18 ModemManager[22528]: cannot connect to proxy: Could not connect: Connection refused
Mar  3 19:14:16 U18 ModemManager[22528]: spawning new qmi-proxy (try 1)...
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0] Checking version info (10 retries)...
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0] QMI Device supports 33 services:
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    ctl (1.5)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    wds (1.67)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    dms (1.14)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    nas (1.25)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    qos (1.6)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    wms (1.10)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    auth (1.3)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    at (1.2)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    voice (2.1)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    cat2 (2.24)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    uim (1.45)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    pbm (1.4)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    test (1.0)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    loc (2.0)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    sar (1.0)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    ts (1.0)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    tmd (1.0)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    wda (1.16)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    csvt (1.1)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    coex (1.0)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    pdc (1.0)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    rfrpe (1.0)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    dsd (1.0)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    ssctl (1.0)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    unknown [0x2e] (1.0)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    unknown [0x30] (1.0)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    unknown [0x31] (1.0)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    unknown [0x36] (1.0)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    rms (1.0)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    unknown [0xf0] (1.0)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    unknown [0xf3] (1.0)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    unknown [0xf5] (1.0)
Mar  3 19:14:16 U18 ModemManager[22528]: [/dev/cdc-wdm0]    unknown [0xf6] (1.0)
Mar  3 19:14:17 U18 ModemManager[22528]: <info>  Couldn't check support for device '/sys/devices/pci0000:00/0000:00:01.2/0000:01:00.0': not supported by any plugin
Mar  3 19:14:17 U18 ModemManager[22528]: <info>  Couldn't check support for device '/sys/devices/pci0000:00/0000:00:01.4/0000:08:00.0': not supported by any plugin

ak@U18:~$ mmcliMar  3 19:14:31 U18 ModemManager[22528]: <info>  [device /sys/devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-5] creating modem with plugin 'Sierra' and '5' ports
Mar  3 19:14:31 U18 ModemManager[22528]: <warn>  Could not grab port (tty/ttyUSB1): 'Cannot add port 'tty/ttyUSB1', unhandled serial type'
Mar  3 19:14:31 U18 ModemManager[22528]: <info>  Modem for device '/sys/devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-5' successfully created
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0] Opening device with flags 'version-info, proxy'...
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0] loaded driver of cdc-wdm port: qmi_wwan
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0] Checking version info (10 retries)...
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0] QMI Device supports 33 services:
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    ctl (1.5)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    wds (1.67)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    dms (1.14)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    nas (1.25)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    qos (1.6)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    wms (1.10)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    auth (1.3)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    at (1.2)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    voice (2.1)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    cat2 (2.24)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    uim (1.45)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    pbm (1.4)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    test (1.0)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    loc (2.0)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    sar (1.0)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    ts (1.0)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    tmd (1.0)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    wda (1.16)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    csvt (1.1)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    coex (1.0)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    pdc (1.0)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    rfrpe (1.0)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    dsd (1.0)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    ssctl (1.0)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    unknown [0x2e] (1.0)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    unknown [0x30] (1.0)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    unknown [0x31] (1.0)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    unknown [0x36] (1.0)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    rms (1.0)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    unknown [0xf0] (1.0)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    unknown [0xf3] (1.0)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    unknown [0xf5] (1.0)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0]    unknown [0xf6] (1.0)
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0] Reading expected data format from: /sys/class/net/wwp3s0f0u5i8/qmi/raw_ip
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0] Allocating new client ID...
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0] Registered 'wda' (version 1.16) client with ID '1'
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0] Allocating new client ID...
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0] Releasing 'wda' client with flags 'release-cid'...
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0] Unregistered 'wda' client with ID '1'
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0] Registered 'dms' (version 1.14) client with ID '3'
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0] Allocating new client ID...
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0] Registered 'nas' (version 1.25) client with ID '4'
Mar  3 19:14:31 U18 ModemManager[22528]: [/dev/cdc-wdm0] Allocating new client ID...
Mar  3 19:14:32 U18 ModemManager[22528]: [/dev/cdc-wdm0] Registered 'wms' (version 1.10) client with ID '3'
Mar  3 19:14:32 U18 ModemManager[22528]: [/dev/cdc-wdm0] Allocating new client ID...
Mar  3 19:14:32 U18 ModemManager[22528]: [/dev/cdc-wdm0] Registered 'uim' (version 1.45) client with ID '3'
Mar  3 19:14:32 U18 ModemManager[22528]: [/dev/cdc-wdm0] Allocating new client ID...
Mar  3 19:14:32 U18 ModemManager[22528]: [/dev/cdc-wdm0] Registered 'loc' (version 2.0) client with ID '2'
Mar  3 19:14:34 U18 ModemManager[22528]: <info>  Modem: state changed (unknown -> disabled)
Mar  3 19:14:34 U18 NetworkManager[1032]: <info>  [1614827674.1962] modem["cdc-wdm0"]: modem state changed, 'disabled' --> 'enabling' (reason: user preference)
Mar  3 19:14:34 U18 NetworkManager[1032]: <info>  [1614827674.1974] manager: (cdc-wdm0): new Broadband device (/org/freedesktop/NetworkManager/Devices/17)
Mar  3 19:14:34 U18 NetworkManager[1032]: <info>  [1614827674.1977] device (cdc-wdm0): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external')
Mar  3 19:14:34 U18 NetworkManager[1032]: <info>  [1614827674.1980] device (cdc-wdm0): modem state 'enabling'
Mar  3 19:14:34 U18 NetworkManager[1032]: <info>  [1614827674.1988] device (cdc-wdm0): state change: unavailable -> disconnected (reason 'none', sys-iface-state: 'managed')
Mar  3 19:14:34 U18 ModemManager[22528]: <info>  Modem /org/freedesktop/ModemManager1/Modem/0: state changed (disabled -> enabling)
Mar  3 19:14:34 U18 gnome-shell[1389]: nma_mobile_providers_database_lookup_cdma_sid: assertion 'sid > 0' failed
Mar  3 19:14:35 U18 ModemManager[22528]: <info>  Modem /org/freedesktop/ModemManager1/Modem/0: state changed (enabling -> enabled)
Mar  3 19:14:35 U18 NetworkManager[1032]: <info>  [1614827675.3852] modem["cdc-wdm0"]: modem state changed, 'enabling' --> 'enabled' (reason: user-requested)

error: no actions specified
ak@U18:~$ mmcli -m 1
error: couldn't find modem at '/org/freedesktop/ModemManager1/Modem/1'
ak@U18:~$ mmcli -m 0
  --------------------------------
  General  |            dbus path: /org/freedesktop/ModemManager1/Modem/0
           |            device id: a9a9c67168bd0cbff27762693b6313619d8cccb8
  --------------------------------
  Hardware |         manufacturer: Sierra Wireless, Incorporated
           |                model: EM7455
           |             revision: SWI9X30C_02.24.05.06 r7040 CARMD-EV-FRMWR2 2017/05/19 06:23:09
           |         h/w revision: 1.0
           |            supported: gsm-umts, lte
           |              current: gsm-umts, lte
           |         equipment id: 359073065280905
  --------------------------------
  System   |               device: /sys/devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-5
           |              drivers: qcserial, qmi_wwan
           |               plugin: Sierra
           |         primary port: cdc-wdm0
           |                ports: ttyUSB0 (qcdm), wwp3s0f0u5i8 (net), ttyUSB2 (at),
           |                       cdc-wdm0 (qmi)
  --------------------------------
  Numbers  |                  own: 17863816477
  --------------------------------
  Status   |                 lock: sim-pin2
           |       unlock retries: sim-pin (3), sim-pin2 (10), sim-puk (10), sim-puk2 (10)
           |                state: enabled
           |          power state: on
           |       signal quality: 0% (cached)
  --------------------------------
  Modes    |            supported: allowed: 3g; preferred: none
           |                       allowed: 4g; preferred: none
           |                       allowed: 3g, 4g; preferred: 3g
           |                       allowed: 3g, 4g; preferred: 4g
           |              current: allowed: 3g, 4g; preferred: 4g
  --------------------------------
  Bands    |            supported: utran-1, utran-3, utran-4, utran-5, utran-8, utran-2,
           |                       eutran-1, eutran-2, eutran-3, eutran-4, eutran-5, eutran-7, eutran-8,
           |                       eutran-12, eutran-13, eutran-20, eutran-25, eutran-41
           |              current: eutran-1, eutran-2, eutran-3, eutran-4, eutran-5, eutran-7,
           |                       eutran-8, eutran-12, eutran-13, eutran-20, eutran-25, eutran-41
  --------------------------------
  IP       |            supported: ipv4, ipv6, ipv4v6
  --------------------------------
  3GPP     |                 imei: 359073065280905
  --------------------------------
  3GPP EPS | ue mode of operation: csps-2
  --------------------------------
  SIM      |            dbus path: /org/freedesktop/ModemManager1/SIM/0
8

This EM7455 modem works with my device over USB (with other M.2 to WWAN USB adapters with SIM card) as well as over direct connection to M.2 port.

I need to use EM Dev kit for some debugging. Is there any reference document for setting up and troubleshooting the EM Dev Kit?

Could you please check the attached image and confirm if my setup is OK?

9

Then seems no LTE band in your area.