Simtech plugin filtering out Waveshare Raspberry Pi 4G HAT

Wed Nov 17 15:41:07 UTC 2021

I've just bought one of these

https://www.waveshare.com/SIM7600E-H-4G-hat.htm

and I'm trying to get it to work with ModemManager using (at the moment)
the default version available in Raspberry Pi OS (mm 1.14.12). I'm also
having some trouble convincing meson to build the latest version to try
making changes, but I think that's a separate problem entirely due to my
lack of understanding of meson.

ModemManager v1.14.12 works if I switch the jumpers around to "control the
SIM7600 via USB to UART" and plug in an additional USB cable from the Pi to
the HAT's onboard USB connection, but I'm trying to get it to work without
this cable and in its default "Raspberry Pi control" jumper setting (mainly
because it's neater, honestly).

I believe that the Hat's serial port is being filtered out because the
Simtech plugin expects the Hat to have a Vendor/Product ID. However, when
plugged in via the GPIO header, I see only a serial (ttyS0) interface, and
thus no Vendor/Product IDs can match.

Can I force the Simtech plugin to be used, or would it make no sense
because of the single serial port? Should it be claimed and usable by the
AT plugin instead? I'm more than happy to change stuff on this, because it
has no other use at the moment.

thanks

Below is the output of ModemManager --debug, filtered for ttyS0

ModemManager[18072]: <debug> [1637163427.209175] [base-manager] adding port
ttyS0 at sysfs path: /sys/devices/platform/soc/3f215040.serial/tty/ttyS0
ModemManager[18072]: <debug> [1637163427.211117] [filter] (tty/ttyS0) port
allowed: device is whitelisted
ModemManager[18072]: <debug> [1637163427.211261] [base-manager] port ttyS0
is first in device /sys/devices/platform/soc/3f215040.serial
ModemManager[18072]: <debug> [1637163427.212551] [plugin-manager] task 0:
port grabbed: ttyS0
ModemManager[18072]: <debug> [1637163427.212682] [plugin-manager] task
0,ttyS0: new support task for port
ModemManager[18072]: <debug> [1637163427.212731] [plugin-manager] task
0,ttyS0: deferred until min wait time elapsed
ModemManager[18072]: <debug> [1637163428.714120] [plugin/pantech] port
ttyS0 filtered by vendor/product IDs
ModemManager[18072]: <debug> [1637163428.714196] [plugin/novatel] port
ttyS0 filtered by vendor/product IDs
ModemManager[18072]: <debug> [1637163428.714249] [plugin/wavecom] port
ttyS0 filtered by vendor/product IDs
ModemManager[18072]: <debug> [1637163428.714297] [plugin/thuraya] port
ttyS0 filtered by vendor/product IDs
ModemManager[18072]: <debug> [1637163428.714340] [plugin/zte] port ttyS0
filtered by vendor/product IDs
ModemManager[18072]: <debug> [1637163428.714394] [plugin/motorola] port
ttyS0 filtered by vendor/product IDs
ModemManager[18072]: <debug> [1637163428.714453] [plugin/option] port ttyS0
filtered by drivers
ModemManager[18072]: <debug> [1637163428.714500] [plugin/nokia-icera] port
ttyS0 filtered by vendor/product IDs
ModemManager[18072]: <debug> [1637163428.714548] [plugin/simtech] port
ttyS0 filtered by vendor/product IDs
ModemManager[18072]: <debug> [1637163428.714598] [plugin/fibocom] port
ttyS0 filtered by drivers
ModemManager[18072]: <debug> [1637163428.714642] [plugin/altair-lte] port
ttyS0 filtered by vendor/product IDs
ModemManager[18072]: <debug> [1637163428.714693] [plugin/dell] port ttyS0
filtered by vendor/product IDs
ModemManager[18072]: <debug> [1637163428.714737] [plugin/x22x] port ttyS0
filtered by vendor/product IDs
ModemManager[18072]: <debug> [1637163428.714796] [plugin/ericsson-mbm] port
ttyS0 filtered by udev tags
ModemManager[18072]: <debug> [1637163428.714842] [plugin/longcheer] port
ttyS0 filtered by vendor/product IDs
ModemManager[18072]: <debug> [1637163428.714888] [plugin/anydata] port
ttyS0 filtered by vendor/product IDs
ModemManager[18072]: <debug> [1637163428.714941] [plugin/huawei] port ttyS0
filtered by vendor/product IDs
ModemManager[18072]: <debug> [1637163428.714996] [plugin/haier] port ttyS0
filtered by vendor/product IDs
ModemManager[18072]: <debug> [1637163428.715039] [plugin/broadmobi] port
ttyS0 filtered by vendor/product IDs
ModemManager[18072]: <debug> [1637163428.715082] [plugin/d-link] port ttyS0
filtered by vendor/product IDs
ModemManager[18072]: <debug> [1637163428.715130] [plugin/foxconn] port
ttyS0 filtered by vendor/product IDs
ModemManager[18072]: <debug> [1637163428.715193] [plugin/samsung] port
ttyS0 filtered by vendor/product IDs
ModemManager[18072]: <debug> [1637163428.715238] [plugin/tp-link] port
ttyS0 filtered by vendor/product IDs
ModemManager[18072]: <debug> [1637163428.715282] [plugin/linktop] port
ttyS0 filtered by vendor/product IDs
ModemManager[18072]: <debug> [1637163428.715326] [plugin/option-hso] port
ttyS0 filtered by drivers
ModemManager[18072]: <debug> [1637163428.715370] [plugin/sierra] port ttyS0
filtered by drivers
ModemManager[18072]: <debug> [1637163428.715505] [plugin/mtk] port ttyS0
filtered by udev tags
ModemManager[18072]: <debug> [1637163428.715563] [plugin/sierra-legacy]
port ttyS0 filtered by drivers
ModemManager[18072]: <debug> [1637163428.715618] [plugin/novatel-lte] port
ttyS0 filtered by vendor/product IDs
ModemManager[18072]: <debug> [1637163428.715698] [plugin-manager] task
0,ttyS0: found '8' plugins to try
ModemManager[18072]: <debug> [1637163428.715741] [plugin-manager] task
0,ttyS0: will try with plugin 'u-blox'
ModemManager[18072]: <debug> [1637163428.715777] [plugin-manager] task
0,ttyS0: will try with plugin 'iridium'
ModemManager[18072]: <debug> [1637163428.715811] [plugin-manager] task
0,ttyS0: will try with plugin 'nokia'
ModemManager[18072]: <debug> [1637163428.715857] [plugin-manager] task
0,ttyS0: will try with plugin 'cinterion'
ModemManager[18072]: <debug> [1637163428.715892] [plugin-manager] task
0,ttyS0: will try with plugin 'via'
ModemManager[18072]: <debug> [1637163428.715927] [plugin-manager] task
0,ttyS0: will try with plugin 'quectel'
ModemManager[18072]: <debug> [1637163428.715961] [plugin-manager] task
0,ttyS0: will try with plugin 'telit'
ModemManager[18072]: <debug> [1637163428.715998] [plugin-manager] task
0,ttyS0: will try with plugin 'generic'
ModemManager[18072]: <debug> [1637163428.716092] [plugin-manager] task
0,ttyS0: started
ModemManager[18072]: <debug> [1637163428.716152] [plugin-manager] task
0,ttyS0: checking with plugin 'u-blox'
ModemManager[18072]: <debug> [1637163428.716255] [plugin/u-blox] probes
required for port ttyS0: 'at, at-vendor'
ModemManager[18072]: <debug> [1637163428.716335] [ttyS0/probe] launching
port probing: 'at, at-vendor'
ModemManager[18072]: <debug> [1637163428.716510] [plugin-manager] task 0:
still 1 running probes (1 active): ttyS0
ModemManager[18072]: <debug> [1637163428.717410] [ttyS0/at] opening serial
port...
ModemManager[18072]: <debug> [1637163428.717933] [ttyS0/at] setting up
baudrate: 57600
ModemManager[18072]: <debug> [1637163428.718050] [ttyS0/at] no flow control
explicitly requested for device
ModemManager[18072]: <debug> [1637163428.718219] [ttyS0/at] device open
count is 1 (open)
ModemManager[18072]: <debug> [1637163428.718346] [ttyS0/at] port attributes
not fully set
ModemManager[18072]: <debug> [1637163428.819514] [ttyS0/at] --> 'AT<CR>'
ModemManager[18072]: <debug> [1637163429.714082] [plugin-manager] task 0:
still 1 running probes (1 active): ttyS0
ModemManager[18072]: <debug> [1637163431.677274] [ttyS0/at] --> 'AT<CR>'
ModemManager[18072]: <debug> [1637163434.678993] [ttyS0/at] --> 'AT<CR>'
ModemManager[18072]: <debug> [1637163437.678441] [ttyS0/probe] port is not
AT-capable
ModemManager[18072]: <debug> [1637163437.678668] [plugin/u-blox] port ttyS0
filtered by vendor strings
ModemManager[18072]: <debug> [1637163437.678790] [plugin-manager] task
0,ttyS0: checking with plugin 'iridium'
ModemManager[18072]: <debug> [1637163437.678967] [plugin/iridium] probes
required for port ttyS0: 'at, at-vendor, at-product'
ModemManager[18072]: <debug> [1637163437.679067] [ttyS0/probe] port probing
finished: no more probings needed
ModemManager[18072]: <debug> [1637163437.679256] [ttyS0/at] device open
count is 0 (close)
ModemManager[18072]: <debug> [1637163437.679447] [ttyS0/at] closing serial
port...
ModemManager[18072]: <debug> [1637163437.679949] [ttyS0/at] serial port
closed
ModemManager[18072]: <debug> [1637163437.680213] [ttyS0/at] forced to close
port
ModemManager[18072]: <debug> [1637163437.680479] [plugin/iridium] port
ttyS0 filtered as no vendor/product strings given
ModemManager[18072]: <debug> [1637163437.680609] [plugin-manager] task
0,ttyS0: checking with plugin 'nokia'
ModemManager[18072]: <debug> [1637163437.680798] [plugin/nokia] probes
required for port ttyS0: 'at, at-vendor, at-icera'
ModemManager[18072]: <debug> [1637163437.680925] [ttyS0/probe] port probing
finished: no more probings needed
ModemManager[18072]: <debug> [1637163437.681129] [plugin/nokia] port ttyS0
filtered by vendor strings
ModemManager[18072]: <debug> [1637163437.681276] [plugin-manager] task
0,ttyS0: checking with plugin 'cinterion'
ModemManager[18072]: <debug> [1637163437.681433] [plugin/cinterion] probes
required for port ttyS0: 'at, at-vendor'
ModemManager[18072]: <debug> [1637163437.681551] [ttyS0/probe] port probing
finished: no more probings needed
ModemManager[18072]: <debug> [1637163437.681750] [plugin/cinterion] port
ttyS0 filtered by vendor strings
ModemManager[18072]: <debug> [1637163437.681874] [plugin-manager] task
0,ttyS0: checking with plugin 'via'
ModemManager[18072]: <debug> [1637163437.682050] [plugin/via] probes
required for port ttyS0: 'at, at-vendor, at-product'
ModemManager[18072]: <debug> [1637163437.682159] [ttyS0/probe] port probing
finished: no more probings needed
ModemManager[18072]: <debug> [1637163437.682372] [plugin/via] port ttyS0
filtered as no vendor/product strings given
ModemManager[18072]: <debug> [1637163437.682485] [plugin-manager] task
0,ttyS0: checking with plugin 'quectel'
ModemManager[18072]: <debug> [1637163437.682624] [plugin/quectel] probes
required for port ttyS0: 'at, at-vendor, qcdm'
ModemManager[18072]: <debug> [1637163437.682746] [ttyS0/probe] launching
port probing: 'qcdm'
ModemManager[18072]: <debug> [1637163437.682950] [ttyS0/probe] probing
QCDM...
ModemManager[18072]: <debug> [1637163437.683246] [ttyS0/qcdm] opening
serial port...
ModemManager[18072]: <debug> [1637163437.684313] [ttyS0/qcdm] device open
count is 1 (open)
ModemManager[18072]: <debug> [1637163437.684664] [ttyS0/qcdm] --> 7e 00 78
f0 7e
ModemManager[18072]: <debug> [1637163440.679258] [ttyS0/qcdm] --> 7e 00 78
f0 7e
ModemManager[18072]: <debug> [1637163443.678750] [ttyS0/probe] port is not
QCDM-capable
ModemManager[18072]: <debug> [1637163443.678992] [plugin/quectel] port
ttyS0 filtered by vendor strings
ModemManager[18072]: <debug> [1637163443.679206] [plugin-manager] task
0,ttyS0: checking with plugin 'telit'
ModemManager[18072]: <debug> [1637163443.679968] [plugin/telit] probes
required for port ttyS0: 'at, at-vendor'
ModemManager[18072]: <debug> [1637163443.681210] [ttyS0/probe] port probing
finished: no more probings needed
ModemManager[18072]: <debug> [1637163443.682619] [ttyS0/qcdm] device open
count is 0 (close)
ModemManager[18072]: <debug> [1637163443.682762] [ttyS0/qcdm] closing
serial port...
ModemManager[18072]: <debug> [1637163443.683662] [ttyS0/qcdm] serial port
closed
ModemManager[18072]: <debug> [1637163443.683904] [ttyS0/qcdm] forced to
close port
ModemManager[18072]: <debug> [1637163443.684123] [plugin/telit] port ttyS0
filtered by vendor strings
ModemManager[18072]: <debug> [1637163443.684238] [plugin-manager] task
0,ttyS0: checking with plugin 'generic'
ModemManager[18072]: <debug> [1637163443.684396] [plugin/generic] probes
required for port ttyS0: 'at, qcdm'
ModemManager[18072]: <debug> [1637163443.684521] [ttyS0/probe] port probing
finished: no more probings needed
ModemManager[18072]: <debug> [1637163443.684733] [plugin-manager] task
0,ttyS0: found best plugin for port (generic)
ModemManager[18072]: <debug> [1637163443.684833] [plugin-manager] task
0,ttyS0: finished in '16.472155' seconds
ModemManager[18072]: <warn>  [1637163443.717714] [plugin/generic] could not
grab port ttyS0: Cannot add port 'tty/ttyS0', unhandled serial type
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