[Ublox]: UBlox L-210 will not work using ACM interface

[Engel, Mike]

Hi all,

We are using the UBlox L-210 modem with ModemManager 1.6.4 and the ACM interface we getting the following error message. 

ModemManager[852]: <debug> [1489583434.054490] [../../ModemManager-1.6.4/src/mm-port-serial-at.c:459] debug_log(): (ttyACM0): <-- 
'<CR><LF>OK<CR><LF>'
ModemManager[852]: <debug> [1489583434.055143] [../../ModemManager-1.6.4/src/mm-base-sim.c:993] load_sim_identifier_finish(): load
ed SIM identifier: 8934041816110350586
ModemManager[852]: <debug> [1489583434.055545] [../../ModemManager-1.6.4/src/mm-base-sim.c:1074] load_imsi(): loading IMSI...
ModemManager[852]: <debug> [1489583434.055834] [../../ModemManager-1.6.4/src/mm-port-serial.c:1288] mm_port_serial_open(): (ttyACM
0) device open count is 3 (open)
ModemManager[852]: <debug> [1489583434.056177] [../../ModemManager-1.6.4/src/mm-port-serial.c:1345] _close_internal(): (ttyACM0) d
evice open count is 2 (close)
ModemManager[852]: <debug> [1489583434.056513] [../../ModemManager-1.6.4/src/mm-port-serial-at.c:459] debug_log(): (ttyACM0): --> 
'AT+CIMI<CR>'
ModemManager[852]: <debug> [1489583434.404577] [../../ModemManager-1.6.4/src/mm-port-serial-at.c:459] debug_log(): (ttyACM0): <-- 
'<CR><LF>+CME ERROR: 3<CR><LF>'
ModemManager[852]: <debug> [1489583434.405017] [../../ModemManager-1.6.4/src/mm-serial-parsers.c:364] mm_serial_parser_v1_parse():
 Got failure code 3: Operation not allowed
ModemManager[852]: <warn>  [1489583434.405387] [../../ModemManager-1.6.4/src/mm-base-sim.c:1423] load_imsi_ready(): couldn't load 
IMSI: 'Operation not allowed'
ModemManager[852]: <debug> [1489583434.405699] [../../ModemManager-1.6.4/src/mm-base-sim.c:1194] load_operator_identifier(): loadi
ng Operator ID...

Any idea what could be the problem? Maybe firmware version or another AT command that unlocks the SIM?

-------------------------
  Hardware |   manufacturer: 'u-blox'
           |          model: 'TOBY-L210'
           |       revision: '09.71'
           |      supported: 'gsm-umts, lte'
           |        current: 'gsm-umts, lte'
           |   equipment id: '352255060049271'
  -------------------------
  -------------------------
  Status   |           lock: 'sim-pin'
           | unlock retries: 'unknown'
           |          state: 'locked'
           |    power state: 'unknown'
           |    access tech: 'unknown'
           | signal quality: '0' (cached)
  -------------------------

Thanks for your help. 

Best regards,
--
Mike Engel
Lead Software Engineer


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