GL-X3000 modem query/control without uqmi

Technical Support for Routers 4G LTE, 5G NR, USB modems
1

The GL-X3000 is very, VERY fast on 5G (I’ve seen 445 Mps down; 90 Mbps up) and seems to be stable and reliable.

On the GL-X750 it was possible to use uqmi to retrieve connection status, RSSI, etc, shell scripts could stop and start the network connection, and as a last resort a hard restart of modem was possible by toggling a gpio.

As far as I can see the GL-X3000 doesn’t use qmi to communicate with the modem, so no uqmi.

Is there an alternative to uqmi to get status, RSSI, RSRQ etc. within scripts rather than the HTML console? And is there a recommended way of re-starting connection, resetting modem, etc. ?

Cheers
Sen

2

AT present, the basic information of some modem can be obtained by AT instruction.

Can you be more specific about what information you want?

3

I’m happy to use AT commands, if that will not interfere with system software. To device ‘/dev/mhi_DUN’ I guess?

Here are the three uqmi commands that I think are most useful (on a GL-X750):

root@2HHG-4G:~# uqmi -d /dev/cdc-wdm0 --get-data-status
"connected"
root@2HHG-4G:~# uqmi -d /dev/cdc-wdm0 --get-signal-info
{
	"type": "lte",
	"rssi": -48,
	"rsrq": -10,
	"rsrp": -75,
	"snr": 114
}
root@2HHG-4G:~# uqmi -d /dev/cdc-wdm0 --get-current-settings
{
	"pdp-type": "ipv4",
	"ip-family": "ipv4",
	"mtu": 1500,
	"ipv4": {
		"ip": "10.34.236.123",
		"dns1": "10.205.64.1",
		"dns2": "10.205.64.1",
		"gateway": "10.34.236.124",
		"subnet": "255.255.255.248"
	},
	"ipv6": {
		
	},
	"domain-names": {
		
	}
}
4

signal: AT+QRSRP

IP:AT+CGPADDR

5

signal: AT+QRSRP

Which signal is this suppose to display?

I would like to see my RSSI.

When I input the command it Returns "OK".

image

6

AT+CSQ should be the command to get the RSSI

7

This is the result.

image

8

This is the table for translating the values:

Value RSSI dBm Condition
99 - Feature not implemented
2 -109 Marginal
3 -107 Marginal
4 -105 Marginal
5 -103 Marginal
6 -101 Marginal
7 -99 Marginal
8 -97 Marginal
9 -95 Marginal
10 -93 OK
11 -91 OK
12 -89 OK
13 -87 OK
14 -85 OK
15 -83 Good
16 -81 Good
17 -79 Good
18 -77 Good
19 -75 Good
20 -73 Excellent
21 -71 Excellent
22 -69 Excellent
23 -67 Excellent
24 -65 Excellent
25 -63 Excellent
26 -61 Excellent
27 -59 Excellent
28 -57 Excellent
29 -55 Excellent
30 -53 Excellent
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9

Why isn't RSSI displayed in the Historical Signal Strength tab?

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10

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you use 3G?

11

Yes.
That's the only cellular signal I can get at this location.
The closest tower is approximately 23 miles away.

12

3G has no rsrp value

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13

Thanks for educating me :blush::+1:t4:

14

Could this be the reason why no cell towers are found ?

Google Photos

15

Probably yes since AT+QSCAN is only applicable for LTE and 5G I believe

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