Sierre Wireless MC7304에서 신호 강도를 검색 할 수 없습니다.
또한 mmcli를 통해 AT 명령을 보내면 작동하지 않는 것 같습니다.ModemManager : mmcli 신호 강도 받기
:~ $ sudo mmcli -m /org/freedesktop/ModemManager1/Modem/0 --signal-get
error: modem has no extended signal capabilities
:~ $ sudo mmcli -m /org/freedesktop/ModemManager1/Modem/0 --command=AT+CSQ
error: command failed: 'GDBus.Error:org.freedesktop.ModemManager1.Error.Core.Unauthorized: Cannot send AT command to modem: operation only allowed in debug mode'
/org/freedesktop/ModemManager1/Modem/0 (device id
'dd26a5483d051c6e25a7ca10f4d36a94791c7ebf')
-------------------------
Hardware | manufacturer: 'Sierra Wireless, Incorporated'
| model: 'MC7304'
| revision: 'SWI9X15C_05.05.16.02 r21040 carmd-fwbuild1
2014/03/17 23:49:48'
| supported: 'gsm-umts, lte'
| current: 'gsm-umts, lte'
| equipment id: 'unknown'
-------------------------
System | device:
'/sys/devices/platform/soc/3f980000.usb/usb1/1-1/1-1.5'
| drivers: 'qmi_wwan, qcserial'
| plugin: 'Gobi'
| primary port: 'ttyUSB2'
| ports: 'ttyUSB0 (qcdm), ttyUSB2 (at), wwan0 (net),
wwan1 (net)'
-------------------------
Numbers | own : 'unknown'
-------------------------
Status | lock: 'none'
| unlock retries: 'unknown'
| state: 'connected'
| power state: 'on'
| access tech: 'lte'
| signal quality: '0' (recent)
-------------------------
Modes | supported: 'allowed: 2g, 3g, 4g; preferred: none'
| current: 'allowed: 2g, 3g, 4g; preferred: none'
-------------------------
Bands | supported: 'unknown'
| current: 'unknown'
-------------------------
IP | supported: 'ipv4, ipv6, ipv4v6'
-------------------------
3GPP | imei: 'unknown'
| enabled locks: 'none'
| operator id: 'hidden'
| operator name: 'hidden'
| subscription: 'unknown'
| registration: 'home'
-------------------------
SIM | path: '/org/freedesktop/ModemManager1/SIM/0'
-------------------------
Bearers | paths: '/org/freedesktop/ModemManager1/Bearer/0'
예를 들어 Mikrotik 922 카드와 같이 모뎀을 사용할 때 신호 강도가 좋을 것 같습니다.
저는 나무 딸기 파이에 mmcli 버전 1.4.0-1 및 커널 4.450을 사용하고 있습니다.