RM520N-GL eSIM feature

[TrashJager]

Is the internal eSIM present on my module? I set the SIM to 2 but it doesn’t seem to be working or present.

AT+QESIM="lpa_enable",1 OKs but AT+QESIM="eid" ERRORs

lpad fails. I can definitely ping the SMDP server.

root@OpenWRT:/tmp# quectel_lpad -D 1 -A '1\$thales2.prod.ondemandconnectivity.com\$XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\$'
Quctel LPAd Version: 1.0.7
Log level         : 1
########## Add profile ##########
SIM slot          : 1
Activation code   : 1\$thales2.prod.ondemandconnectivity.com\$XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\$
Confirmation code : 
User consent      : 0
########## Delete profile ##########
SIM slot          : 0
Delete profile id : 0
[DEBUG] [QMIM] [qmi_manager//qmi_manager.c] [430] module works in QMI mode
[DEBUG] [QMIM] [qmi_manager//qmi_manager.c] [497] Do UIM HTTP Transaction Request
                                                                      
[                                                  ][  0%][/]         
                                                                      
[DEBUG] [QMIM] [qmi_manager//qmi_manager.c] [513] Send Result : 3
[WARN ] [MAIN] [app//main.c] [543] Send QMI UIM HTTP Message Failure, But It Matched Expectation
[DEBUG] [QMIM] [qmi_manager//qmi_manager.c] [503] Do UIM Add Profile Request
[DEBUG] [QMIM] [qmi_manager//qmi_manager.c] [513] Send Result : 3     
[ERROR] [MAIN] [app//main.c] [562] Send UIM Add Profile Message Failure

I’ve checked schematics and pins 48, 46, 44, 40, 42 are not connected. What am I missing?

[Emre_Karabek]

Hi,

From the AT command results you sent, it appears that your module doesn’t have an internal eSIM.

As can be seen in the images below, the RM520N-GL module doesn’t have the eSIM feature, while the EM120K-GL module does(optional).

AT+QESIM=“lpa_enable”,1 – returns OK because this is just a configuration flag.

But AT+QESIM=“eid” – returns ERROR – in this case, the module doesn’t have a chip to read the EID (Embedded Identifier). This means there’s no real internal eSIM.

Furthermore, the SIM pins you checked in the schematic (SIM_VDD, SIM_DATA, SIM_CLK, SIM_RST, etc., pins 40–48) are left blank. These pins would be used to connect an external nano-SIM. If the SKU had the internal eSIM (iUICC) option, the EID would be readable and profile downloading with lpad would work.

So, the SKU you’re using only supports the physical SIM slot.

There’s no built-in eSIM, so the EID check fails, and the Lpad fails.

[silvia]

Dear @TrashJager
It doesn’t have eSIM internally. It need specific hardware..

[mfrega]

Is possible to receive the changelog of LPAd software?
Is the 1.0.8 the latest version?

Thank you

[silvia]

Dear @mfrega
Due to some limitation, I can’t share it now.
Please contact with your supplier to get it.
Thanks for your understanding.