Difference between revisions of "Mobile signal strength check"
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| + | This page provides detailed information how to check mobile signal reception quality from command line. For general information on mobile networks and modems, please go to [[Mobile network - 3G, 4G|Mobile network - 3G/4G modem installation and configuration]]. | ||
| + | |||
This link shows a good description of what signal quality is needed: | This link shows a good description of what signal quality is needed: | ||
[https://wiki.teltonika-networks.com/view/Mobile_Signal_Strength_Recommendations] | [https://wiki.teltonika-networks.com/view/Mobile_Signal_Strength_Recommendations] | ||
| − | + | = 4G (MC74xx) modem modules = | |
Login to the camera system locally or remotely, in text console run the following commands. | Login to the camera system locally or remotely, in text console run the following commands. | ||
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crw------- 1 root root 180, 1 Nov 26 11:53 /dev/cdc-wdm1 | crw------- 1 root root 180, 1 Nov 26 11:53 /dev/cdc-wdm1 | ||
| − | + | = 3G modem modules (MC8705) = | |
Login to the camera system, in text console run command 'minicom'. It should be preset to use the correct virtual serial port /dev/ttyS3. | Login to the camera system, in text console run command 'minicom'. It should be preset to use the correct virtual serial port /dev/ttyS3. | ||
Revision as of 06:00, 23 March 2021
This page provides detailed information how to check mobile signal reception quality from command line. For general information on mobile networks and modems, please go to Mobile network - 3G/4G modem installation and configuration.
This link shows a good description of what signal quality is needed: [1]
4G (MC74xx) modem modules
Login to the camera system locally or remotely, in text console run the following commands.
Verbose receive signal print:
root@XXXXXX:~# qmicli -d /dev/cdc-wdm1 --nas-get-signal-strength
[/dev/cdc-wdm1] Successfully got signal strength
Current:
Network 'lte': '-68 dBm'
RSSI:
Network 'lte': '-68 dBm'
ECIO:
Network 'lte': '-2.5 dBm'
IO: '-106 dBm'
SINR: (8) '9.0 dB'
RSRQ:
Network 'lte': '-12 dB'
SNR:
Network 'lte': '1.0 dB'
RSRP:
Network 'lte': '-104 dBm'
Brief receive signal print:
root@XXXXXX:~# qmicli -d /dev/cdc-wdm1 --nas-get-signal-info
[/dev/cdc-wdm1] Successfully got signal info
LTE:
RSSI: '-68 dBm'
RSRQ: '-12 dB'
RSRP: '-104 dBm'
SNR: '-4.4 dB'
Note: if device /dev/cdc-wdm1 was not working, try substitute 1 with 0 or 2. List devices available in your system with 'ls -l /dev/cdc-wdm*'.
ls -l /dev/cdc-wdm* crw------- 1 root root 180, 0 Nov 26 11:53 /dev/cdc-wdm0 crw------- 1 root root 180, 1 Nov 26 11:53 /dev/cdc-wdm1
3G modem modules (MC8705)
Login to the camera system, in text console run command 'minicom'. It should be preset to use the correct virtual serial port /dev/ttyS3. If not, run 'minicom -s' and select this port.
Rype following AT modem commands:
at+csq +CSQ: 14,99 OK at!gstatus? !GSTATUS: Current Time: 7833862 Temperature: 61 Bootup Time: 6442483 Mode: ONLINE System mode: WCDMA PS state: Attached WCDMA band: WCDMA800 GSM band: Unknown WCDMA channel: 4436 GSM channel: 65535 GMM (PS) state:REGISTERED NORMAL SERVICE MM (CS) state: IDLE NORMAL SERVICE WCDMA L1 State:L1M_DCH RRC State: CELL_DCH RX level (dBm):-85 OK
Signal strength (CSQ) >=5 is acceptable, although in country areas the internet may work even with lower signal quality as the masts are not too busy. In any case, the more the better. More than ~ 10 is very realiable connection.
To exit minicom, pres Ctrl+a q.
