RM520N Registration and ECM not working

Traction6596 · May 10, 2024, 10:22am

Hi

I have Quectel RM520N-EU

The issue I have is ECM not working. I am able to get internet access using MBIM (AT+QCFG=“usbnet”,1) but not ECM

The other issue i have is network registration

When i run AT+CGREG=? I get the following

AT+CGREG?

+CGREG: 0,0

OK
The device is not registered and is currently NOT searching for a new operator to which to register.

How do i fix this?

Bean.Wang-Q · May 10, 2024, 12:31pm

Please check the AT

AT+QGMR
AT+QCFG=“usbnet”
AT+QENG=“servingcell”
AT+CFUN?
AT+CPIN?
AT+CGREG?
AT+CEREG?
AT+C5GREG?
AT+COPS?
AT+CGPADDR
AT+CGDCONT?

Traction6596 · May 10, 2024, 2:02pm

AT+QGMR

OK

AT+QCFG=“usbnet”

+QCFG: “usbnet”,2

OK

AT+QENG=“servingcell”

ERROR

AT+CFUN?

+CFUN: 1

OK

AT+CPIN?

+CPIN: READY

OK

AT+CGREG?

+CGREG: 2,0

OK

AT+CEREG?

+CEREG: 2,1,“1955”,“REDACTEd”,13

OK

AT+C5GREG?

+C5GREG: 0,0

OK

AT+COPS?

+COPS: 0,0,“3”,13

OK

AT+CGPADDR

+CGPADDR: 1,“REDACTED”
+CGPADDR: 2,“REDACTED”
+CGPADDR: 22,“0.0.0.0”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”
+CGPADDR: 23,“0.0.0.0”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”
+CGPADDR: 24,“0.0.0.0”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”
+CGPADDR: 3,“0.0.0.0”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”
+CGPADDR: 5,“REDACTED”
OK

AT+CGDCONT?

+CGDCONT: 1,“IPV4V6”,“3internet”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0,“”,0
+CGDCONT: 2,“IPV4V6”,“ims”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0,“”,0
+CGDCONT: 22,“IPV4V6”,“”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0,“”,0
+CGDCONT: 23,“IPV4V6”,“”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0,“”,0
+CGDCONT: 24,“IPV4V6”,“”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0,“”,0
+CGDCONT: 3,“IPV4V6”,“sos”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,1,“”,0
+CGDCONT: 5,“IPV4V6”,“three.co.uk”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0,“”,0

OK

I have internet access with my setup. However this was only because I set the modem to MBIM mode. Why is that?

Bean.Wang-Q · May 10, 2024, 3:26pm

Please show the device manager? Can you see the ECM network adapter?
And please also check

AT+QMAPWAC?

Traction6596 · May 10, 2024, 7:50pm

I get the follow

+QMAPWAC: 1

OK
When i connect the modem to windows i see the ethernet port and I have internet access only via MBIM mode though

Bean.Wang-Q · May 11, 2024, 1:01am

Please show the internet interace and device manager.

Traction6596 · May 11, 2024, 2:53pm

Device: Quectel RM520N-EU
Firmware: RM520NEUDAR03A06M4G_01.200.01.200

See below for device manager

Summary

See below for internet interface (note i get a public IP)

Summary

This is what i see in the wireless taskbar in windows

The usb-c port from my enclosure is connected to my laptop for power and data. The ethernet is also connected (via a dongle) for internet

Summary

If i disconnect the usb, I get no internet. I am currently running in MBIM mode.

If I change the mode to ECM, i get no internet at all even if I connect both the usb and ethernet.

Is this module specific or could it be the enclosure? The instruction that came with the enclosure says to use

Summary

Bean.Wang-Q · May 13, 2024, 1:15am

AT+QCFG=“usbnet”
0 —> RMNET
1 —> ECM
2 —> MBIM

I didn’t the see that you have installed the Quectel ECM windows driver.
Actually, it seems that the usbnet is 2 and it is in MBIM.
Did you misunderstand something?

But the CEREG? shows that it is registerred.

Traction6596 · May 13, 2024, 9:16pm

Hi,

I changed usbnet back to 2 so that I can restore internet access.
Note that I use a windows laptop to setup the modem within the mcuzone 5g enclosure.
I then plug the modem to a proxmox server that is running pfsense.

Before i proceed. If i manage to get ECM running, does that mean I will be able to use the RM520N in the mcuzone enclosure without having to plug the usb cable to the host? For power i have a POE switch, so will i be able to connect the modem to the pfsense box with only an ethernet cable?

Bean.Wang-Q · May 14, 2024, 1:24am

Do you mean that you want with only ethernet cable connection, and the Internet works fine.

And you don’t need the USB.
It is possible.

Traction6596 · May 14, 2024, 12:46pm

Hi, yes this is exactly what I want. The only thing is it will not be Windows but a linux system (debian based)

Bean.Wang-Q · May 14, 2024, 1:35pm

Have you tried this

Please try:

AT+QMAPWAC=1 (setup data call automatucally)
AT+QETH=“eth_driver”,“r8125”
AT+QCFG=“pcie/mode”,1
AT+QCFG=“data_interface”,1,0

And then there will be of no usbnet interface. You can use the Ethernet interface.

Bean.Wang-Q · May 14, 2024, 1:35pm

It will take effect after reboot.

Traction6596 · May 16, 2024, 5:33pm

I’ll give it a go next week

Traction6596 · May 24, 2024, 10:51pm

HI, just tried this and it didn’t work

Bean.Wang-Q · May 26, 2024, 1:16pm

Please show me it with some picture and logs.

Traction6596 · May 26, 2024, 11:32pm

How do i easily collect the logs? I tried following this but it’s not working.

Bean.Wang-Q · May 27, 2024, 3:13am

Please show me that

Whether it can obtain IP address and which kind of IP address is it?
Use AT cmd to check
AT+COPS?
AT+CPIN?
AT+QMAPWAC?
AT+CGPADDR
AT+CGDCONT?
AT+CGACT?

Bean.Wang-Q · May 27, 2024, 3:15am

You just tell me it is not working, but I know what the current phenomenon is.

Traction6596 · May 29, 2024, 10:08am

AT+QCFG=“USBNET”

+QCFG: “usbnet”,1

OK

AT+COPS?

+COPS: 0

OK

AT+CPIN?

+CPIN: READY

OK
SIM is ready

AT+QMAPWAC?

+QMAPWAC: 1

OK

AT+CGPADDR

+CGPADDR: 1,“0.0.0.0”
+CGPADDR: 2,“0.0.0.0”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”
+CGPADDR: 22,“0.0.0.0”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”
+CGPADDR: 23,“0.0.0.0”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”
+CGPADDR: 24,“0.0.0.0”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”
+CGPADDR: 3,“0.0.0.0”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”
+CGPADDR: 5,“0.0.0.0”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”

OK

AT+CGDCONT?

+CGDCONT: 1,“IP”,“3internet”,“0.0.0.0”,0,0,0,0,“”,0
+CGDCONT: 2,“IPV4V6”,“ims”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0,“”,0
+CGDCONT: 22,“IPV4V6”,“”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0,“”,0
+CGDCONT: 23,“IPV4V6”,“”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0,“”,0
+CGDCONT: 24,“IPV4V6”,“”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0,“”,0
+CGDCONT: 3,“IPV4V6”,“sos”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,1,“”,0
+CGDCONT: 5,“IPV4V6”,“three.co.uk”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0,“”,0

OK
Following connection profiles are available,

CID-> 1
PDP Type->IP
APN->3internet
PDP Address->0.0.0.0
Data Compression->0
Header Compression->0

CID-> 2
PDP Type->IPV4V6
APN->ims
PDP Address->0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0
Data Compression->0
Header Compression->0

CID-> 22
PDP Type->IPV4V6
APN->
PDP Address->0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0
Data Compression->0
Header Compression->0

CID-> 23
PDP Type->IPV4V6
APN->
PDP Address->0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0
Data Compression->0
Header Compression->0

CID-> 24
PDP Type->IPV4V6
APN->
PDP Address->0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0
Data Compression->0
Header Compression->0

CID-> 3
PDP Type->IPV4V6
APN->sos
PDP Address->0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0
Data Compression->0
Header Compression->0

CID-> 5
PDP Type->IPV4V6
APN->three.co.uk
PDP Address->0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0
Data Compression->0
Header Compression->0

AT+CGACT?

+CGACT: 1,0
+CGACT: 2,0
+CGACT: 22,0
+CGACT: 23,0
+CGACT: 24,0
+CGACT: 3,0
+CGACT: 5,0

OK