Hi,
I'm connected to a modem with a *single* serial port (Simcom SIM5320A with
the USB port unwired)
I can connect to Internet using the old way (writing my own chat scripts).
But I couldn't do it using modemmanager. I have a lot of error messages
from ModemManeger like that:
"Couldn't refresh signal quality: 'No AT port available to run command'"
Can ModemManager work with a single physical UART port? any guide here?
Below I share more information about the issue
Best regards,
Andres Calderon
=================================================
# udevadm info /dev/ttyAMA0
P: /devices/platform/soc/3f201000.serial/tty/ttyAMA0
N: ttyAMA0
L: 0
S: serial0
E: DEVPATH=/devices/platform/soc/3f201000.serial/tty/ttyAMA0
E: DEVNAME=/dev/ttyAMA0
E: MAJOR=204
E: MINOR=64
E: SUBSYSTEM=tty
E: USEC_INITIALIZED=5122363
E: ID_MM_CANDIDATE=1
E: ID_MM_TTY_FLOW_CONTROL=none
E: ID_MM_TTY_BAUDRATE=115200
E: ID_MM_DEVICE_PROCESS=1
E: ID_MM_PLATFORM_DRIVER_PROBE=1
E: DEVLINKS=/dev/serial0
E: TAGS=:systemd:
=================================================
# mmcli -m 0
--------------------------
General | dbus path: /org/freedesktop/ModemManager1/Modem/0
| device id: 23b798cdd09c78be14e231127c48d70f5307a48e
--------------------------
Hardware | manufacturer: SIMCOM INCORPORATED
| model: SIMCOM_SIM5320A
| revision: 1575B13SIM5320A
| supported: gsm-umts
| current: gsm-umts
| equipment id: 012813008537617
--------------------------
System | device: /sys/devices/platform/soc
| drivers: uart-pl011
| plugin: Generic
| primary port: ttyAMA0
| ports: ttyAMA0 (at)
--------------------------
Numbers | own: +573176760667
--------------------------
Status | unlock retries: sim-pin (3), sim-pin2 (3), sim-puk (10),
sim-puk2 (10)
| state: disabled
| power state: on
| signal quality: 0% (cached)
--------------------------
Modes | supported: allowed: 2g, 3g; preferred: none
| current: allowed: 2g, 3g; preferred: none
--------------------------
IP | supported: ipv4, ipv6
--------------------------
3GPP | imei: 012813008537617
--------------------------
Andrés Calderón
====================MODEMMANAGER LOG====================
ModemManager[1133]: <debug> [1574094017.402205] No specific IP family
requested, defaulting to ipv4
ModemManager[1133]: <debug> [1574094017.402298] No specific IP family
requested, defaulting to ipv4
ModemManager[1133]: <debug> [1574094017.402439] Looking for best CID...
ModemManager[1133]: <debug> [1574094017.402551] (ttyAMA0) device open count
is 6 (open)
ModemManager[1133]: <debug> [1574094017.402722] (ttyAMA0) device open count
is 5 (close)
ModemManager[1133]: <debug> [1574094017.402865] (ttyAMA0): -->
'AT+COPS=3,0<CR>'
ModemManager[1133]: <debug> [1574094017.420240] (ttyAMA0): <--
'<CR><LF>OK<CR><LF>'
ModemManager[1133]: <debug> [1574094017.420584] (ttyAMA0) device open count
is 4 (close)
ModemManager[1133]: <debug> [1574094017.420786] (ttyAMA0): -->
'AT+COPS?<CR>'
ModemManager[1133]: <debug> [1574094017.435034] (ttyAMA0): <--
'<CR><LF>+COPS:'
ModemManager[1133]: <debug> [1574094017.435707] (ttyAMA0): <-- ' 0,0,"mo'
ModemManager[1133]: <debug> [1574094017.436395] (ttyAMA0): <-- 'vistar",'
ModemManager[1133]: <debug> [1574094017.437102] (ttyAMA0): <--
'2<CR><LF><CR><LF>OK<CR>'
ModemManager[1133]: <debug> [1574094017.437484] (ttyAMA0): <-- '<LF>'
ModemManager[1133]: <debug> [1574094017.438034] loaded Operator Name:
movistar
ModemManager[1133]: <info> [1574094017.438332] Modem
/org/freedesktop/ModemManager1/Modem/0: 3GPP Registration state changed
(registering -> home)
ModemManager[1133]: <debug> [1574094017.438692] Will start keeping track of
state for subsystem '3gpp'
ModemManager[1133]: <debug> [1574094017.438854] (ttyAMA0) device open count
is 3 (close)
ModemManager[1133]: <debug> [1574094017.439624] (ttyAMA0): -->
'AT+CIND?<CR>'
ModemManager[1133]: <debug> [1574094017.455505] (ttyAMA0): <--
'<CR><LF>+CIND:'
ModemManager[1133]: <debug> [1574094017.456197] (ttyAMA0): <-- ' 4,4,1,0'
ModemManager[1133]: <debug> [1574094017.456876] (ttyAMA0): <-- ',0,1,1,0'
ModemManager[1133]: <debug> [1574094017.457569] (ttyAMA0): <--
'<CR><LF><CR><LF>OK<CR><LF>'
ModemManager[1133]: <debug> [1574094017.458379] Modem
/org/freedesktop/ModemManager1/Modem/0: signal quality updated (80)
ModemManager[1133]: <debug> [1574094017.458750] (ttyAMA0) device open count
is 2 (close)
ModemManager[1133]: <debug> [1574094017.459450] Polling to refresh access
technologies is unsupported
ModemManager[1133]: <debug> [1574094017.459576] Periodic signal quality
checks scheduled in 30s
ModemManager[1133]: <debug> [1574094017.459730] (ttyAMA0): -->
'AT+CGDCONT?<CR>'
ModemManager[1133]: <debug> [1574094017.477723] (ttyAMA0): <--
'<CR><LF>+CGDCO'
ModemManager[1133]: <debug> [1574094017.478841] (ttyAMA0): <-- 'NT: 1,"I'
ModemManager[1133]: <debug> [1574094017.479712] (ttyAMA0): <-- 'P","inte'
ModemManager[1133]: <debug> [1574094017.480486] (ttyAMA0): <-- '
rnet.movistar.co'
ModemManager[1133]: <debug> [1574094017.481402] (ttyAMA0): <-- 'm.co","0'
ModemManager[1133]: <debug> [1574094017.482153] (ttyAMA0): <-- '.0.0.0",'
ModemManager[1133]: <debug> [1574094017.482855] (ttyAMA0): <--
'0,0<CR><LF>+CG'
ModemManager[1133]: <debug> [1574094017.483648] (ttyAMA0): <-- 'DCONT: 2'
ModemManager[1133]: <debug> [1574094017.484484] (ttyAMA0): <-- ',"IP","w'
ModemManager[1133]: <debug> [1574094017.485299] (ttyAMA0): <--
'eb.colombiamovil'
ModemManager[1133]: <debug> [1574094017.486231] (ttyAMA0): <-- '.com.co"'
ModemManager[1133]: <debug> [1574094017.487040] (ttyAMA0): <-- ',"0.0.0.'
ModemManager[1133]: <debug> [1574094017.487803] (ttyAMA0): <--
'0",0,0<CR><LF>'
ModemManager[1133]: <debug> [1574094017.488707] (ttyAMA0): <-- '+CGDCONT'
ModemManager[1133]: <debug> [1574094017.489554] (ttyAMA0): <-- ':
3,"IP","intern'
ModemManager[1133]: <debug> [1574094017.490384] (ttyAMA0): <-- 'et.movis'
ModemManager[1133]: <debug> [1574094017.491192] (ttyAMA0): <-- 'tar.com.'
ModemManager[1133]: <debug> [1574094017.492093] (ttyAMA0): <-- 'co","0.0'
ModemManager[1133]: <debug> [1574094017.492957] (ttyAMA0): <--
'.0.0",0,0<CR><LF>+CGDC'
ModemManager[1133]: <debug> [1574094017.493782] (ttyAMA0): <-- 'ONT: 4,"'
ModemManager[1133]: <debug> [1574094017.494623] (ttyAMA0): <-- 'IP","mov'
ModemManager[1133]: <debug> [1574094017.495486] (ttyAMA0): <-- 'iletb.ne'
ModemManager[1133]: <debug> [1574094017.496346] (ttyAMA0): <-- 't.co","0'
ModemManager[1133]: <debug> [1574094017.497221] (ttyAMA0): <--
'.0.0.0",0,0<CR><LF><CR><LF>O'
ModemManager[1133]: <debug> [1574094017.498106] (ttyAMA0): <-- 'K<CR><LF>'
ModemManager[1133]: <debug> [1574094017.499204] Found '4' PDP contexts
ModemManager[1133]: <debug> [1574094017.499335] PDP context [cid=1]
[type='ipv4'] [apn='internet.movistar.com.co']
ModemManager[1133]: <debug> [1574094017.499409] PDP context [cid=2]
[type='ipv4'] [apn='web.colombiamovil.com.co']
ModemManager[1133]: <debug> [1574094017.499481] PDP context [cid=3]
[type='ipv4'] [apn='internet.movistar.com.co']
ModemManager[1133]: <debug> [1574094017.499912] PDP context [cid=4]
[type='ipv4'] [apn='moviletb.net.co']
ModemManager[1133]: <debug> [1574094017.500030] Found PDP context with CID
1 and PDP type ipv4 for APN 'internet.movistar.com.co'
ModemManager[1133]: <debug> [1574094017.500192] (ttyAMA0) device open count
is 3 (open)
ModemManager[1133]: <debug> [1574094017.500614] Connection through a plain
serial AT port (ttyAMA0)
ModemManager[1133]: <debug> [1574094017.500772] (ttyAMA0) device open count
is 4 (open)
ModemManager[1133]: <debug> [1574094017.501322] (ttyAMA0) device open count
is 3 (close)
ModemManager[1133]: <debug> [1574094017.501539] (ttyAMA0): -->
'ATD*99***1#<CR>'
ModemManager[1133]: <debug> [1574094017.520418] (ttyAMA0): <--
'<CR><LF>CONNEC'
ModemManager[1133]: <debug> [1574094017.521287] (ttyAMA0): <-- 'T 115200'
ModemManager[1133]: <debug> [1574094017.522064] (ttyAMA0): <-- '<CR><LF>'
ModemManager[1133]: <debug> [1574094017.522990] (ttyAMA0): port now
connected
ModemManager[1133]: <debug> [1574094017.523252] Connected bearer
'/org/freedesktop/ModemManager1/Bearer/0'
ModemManager[1133]: <info> [1574094017.524890] Modem
/org/freedesktop/ModemManager1/Modem/0: state changed (connecting ->
connected)
ModemManager[1133]: <info> [1574094017.526928] Simple connect state (8/8):
All done
ModemManager[1133]: <debug> [1574094017.528284] (ttyAMA0) device open count
is 2 (close)
ModemManager[1133]: <debug> [1574094022.884121] Couldn't load network
timezone: No AT port available to run command
ModemManager[1133]: <warn> [1574094022.884301] Couldn't load network
timezone from the current network
ModemManager[1133]: <debug> [1574094047.903513] loading signal quality...
ModemManager[1133]: <debug> [1574094047.904192] Couldn't refresh signal
quality: 'No AT port available to run command'
ModemManager[1133]: <debug> [1574094047.904316] Periodic signal quality
checks scheduled in 30s
ModemManager[1133]: <debug> [1574094047.905267] Connection monitoring is
unsupported by the device
ModemManager[1133]: <debug> [1574094077.908613] Signal quality value not
updated in 60s, marking as not being recent
ModemManager[1133]: <debug> [1574094077.909225] loading signal quality...
ModemManager[1133]: <debug> [1574094077.912293] Couldn't refresh signal
quality: 'No AT port available to run command'
ModemManager[1133]: <debug> [1574094077.913112] Periodic signal quality
checks scheduled in 30s
ModemManager[1133]: <debug> [1574094107.909341] loading signal quality...
ModemManager[1133]: <debug> [1574094107.910887] Couldn't refresh signal
quality: 'No AT port available to run command'
ModemManager[1133]: <debug> [1574094107.911877] Periodic signal quality
checks scheduled in 30s
ModemManager[1133]: <debug> [1574094137.909770] loading signal quality...
ModemManager[1133]: <debug> [1574094137.910968] Couldn't refresh signal
quality: 'No AT port available to run command'
ModemManager[1133]: <debug> [1574094137.911119] Periodic signal quality
checks scheduled in 30s
ModemManager[1133]: <debug> [1574094167.909603] loading signal quality...
ModemManager[1133]: <debug> [1574094167.910793] Couldn't refresh signal
quality: 'No AT port available to run command'
ModemManager[1133]: <debug> [1574094167.910940] Periodic signal quality
checks scheduled in 30s
ModemManager[1133]: <debug> [1574094197.909420] loading signal quality...
ModemManager[1133]: <debug> [1574094197.910612] Couldn't refresh signal
quality: 'No AT port available to run command'
ModemManager[1133]: <debug> [1574094197.910761] Periodic signal quality
checks scheduled in 30s
ModemManager[1133]: <debug> [1574094227.908847] loading signal quality...
ModemManager[1133]: <debug> [1574094227.910030] Couldn't refresh signal
quality: 'No AT port available to run command'
ModemManager[1133]: <debug> [1574094227.910179] Periodic signal quality
checks scheduled in 30s
PS: same issue has been reported here (unsolved)
https://serverfault.com/questions/990028/networkmanager-gsm-connection-on-simcom-sim5320a-via-serial-port-is-failing
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