Sending SMS in PDU mode fails.

[José]

I am using the 3G XBee Cellular (uses U-Blox SARA-U200 modem) and
ModemManager from master (d41d717112e6a183a0df510c210e80a86fc11060).

I am trying to send an SMS with the following commands:

$ mmcli -m 0 --messaging-create-sms="text='Hello world',number='+627XXXXXX"
Successfully created new SMS:
        /org/freedesktop/ModemManager1/SMS/10 (unknown)

$ mmcli -s 10 --send
error: couldn't send the SMS:
'GDBus.Error:org.freedesktop.ModemManager1.Error.Message.Unknown:
Unknown error'


The log shows:

<debug> [1501676070.461276]
[../../git/src/mm-iface-modem-messaging.c:511] sms_added(): Added
local SMS at '/org/freedesktop/ModemManager1/SMS/8'
<debug> [1501676078.360084] [../../git/src/mm-base-sms.c:178]
generate_3gpp_submit_pdus():   Processing chunk '0' of text with '11'
bytes
<debug> [1501676078.371070] [../../git/src/mm-base-sms.c:208]
generate_3gpp_submit_pdus(): Created SMS part for singlepart SMS
<debug> [1501676078.374057] [../../git/src/mm-sms-part-3gpp.c:805]
mm_sms_part_3gpp_get_submit_pdu(): Creating PDU for part...
<debug> [1501676078.377048] [../../git/src/mm-sms-part-3gpp.c:892]
mm_sms_part_3gpp_get_submit_pdu():   using GSM7 encoding...
<debug> [1501676078.379982] [../../git/src/mm-sms-part-3gpp.c:957]
mm_sms_part_3gpp_get_submit_pdu():   user data length is '11' septets
(without UDH)
<debug> [1501676078.382961] [../../git/src/mm-port-serial.c:1250]
mm_port_serial_open(): (ttymxc4) device open count is 2 (open)
<debug> [1501676078.386006] [../../git/src/mm-port-serial-at.c:459]
debug_log(): (ttymxc4): --> 'AT+CMGS=22<CR>'
<debug> [1501676078.431257] [../../git/src/mm-port-serial-at.c:459]
debug_log(): (ttymxc4): <-- '<CR><LF>> '
<debug> [1501676078.435569] [../../git/src/mm-port-serial.c:1250]
mm_port_serial_open(): (ttymxc4) device open count is 3 (open)
<debug> [1501676078.438554] [../../git/src/mm-port-serial.c:1307]
_close_internal(): (ttymxc4) device open count is 2 (close)
<debug> [1501676078.441551] [../../git/src/mm-port-serial-at.c:459]
debug_log(): (ttymxc4): -->
'000100099126379999F100000BC8329BFD06DDDF723619\26'
<debug> [1501676078.573891] [../../git/src/mm-port-serial-at.c:459]
debug_log(): (ttymxc4): <-- '<CR><LF>+CMS ERROR: 38<CR><LF>'
<debug> [1501676078.597195] [../../git/src/mm-error-helpers.c:218]
mm_message_error_for_code(): Invalid message error code: 38
<debug> [1501676078.600884] [../../git/src/mm-serial-parsers.c:364]
mm_serial_parser_v1_parse(): Got failure code 500: Unknown error
<debug> [1501676078.604622] [../../git/src/mm-port-serial.c:1307]
_close_internal(): (ttymxc4) device open count is 1 (close)

However if I use a serial console and the following AT commands, the
SMS is properly sent:

ATZ
OK
AT+CMGF=1
OK
AT+CMGS="+627XXXXXX"
> Hello world
+CMGS: 193

OK


a) Could you give any information about why is PDU mode failing?
According to U-Blox documentation (1) it should be working

b) Is there a way to tell ModemManager to use text mode when sending SMSs?

Thanks


(1) https://www.u-blox.com/sites/default/files/u-blox-ATCommands_Manual_(UBX-13002752).pdf