Is possible to get LPAC working on some cheap 4G dongle (UFIxxxx, openstick related) ?

[dev-techmoe]

They have a built-in e-sim chip, and a SIM slot, can we control it using LPAC?

I tried build and run LPAC on it (running a Debian system customized by OpenStick Team) but still got

SCardListReaders() failed: 8010002E
APDU library init error

But pcscd is running.

# systemctl status pcscd
● pcscd.service - PC/SC Smart Card Daemon
     Loaded: loaded (/lib/systemd/system/pcscd.service; indirect; vendor preset: enabled)
     Active: active (running) since Sat 2024-02-03 16:54:33 CST; 6s ago
TriggeredBy: ● pcscd.socket
       Docs: man:pcscd(8)
   Main PID: 573 (pcscd)
      Tasks: 3 (limit: 403)
     Memory: 772.0K
        CPU: 18ms
     CGroup: /system.slice/pcscd.service
             └─573 /usr/sbin/pcscd --foreground --auto-exit

Any idea for debugging this? Or it's an impossible things perhaps?

Thank you.

[damonto]

That’s impossible; this project only supports customer eSIM, which implements SGP.22 features. Most of the 4G dongles are IOT eSIM, which implements SGP.11 only

[dev-techmoe]

That’s impossible; this project only supports customer eSIM, which implements SGP 2.2 features. Most of the 4G dongles are IOT eSIM, which implements SGP 1.1 only

@damonto Thank you for your reply, and I also want to know it's possible to connect the external SIM card or not.

I have a DIY removable euicc SIM card, and it can be control using sparkcyf/LPAdesktop on my Windows PC, it's possible to control it by using LPAC on this 4G dongle? Thank you.

[damonto]

It’s possible, You need a CCID(PCSC) reader. You may also need to install the CCID driver on your device.

[dev-techmoe]

It’s possible, You need a CCID(PCSC) reader. You may also need to install the CCID driver on your device.

I mean that is it possible to do that without any other devices? Just LPAC + euicc SIM card on dongle, like Android phone + OpenEUICC.

[damonto]

It's impossible because most 4G WiFi dongles are based on Qualcomm 410 or 210, which are very old CPUs. Consequently, they don't support AT+CCHO, AT+CCHC, AT+CGLA AT commands, making it impossible to communicate with eUICC. However, if you have documentation about the QCOM protocol (used by Qualcomm old CPUs), you may implement this function by yourself.

[dev-techmoe]

It's impossible because most 4G WiFi dongles are based on Qualcomm 410 or 210, which are very old CPUs. Consequently, they don't support AT+CCHO, AT+CCHC, AT+CGLA AT commands, making it impossible to communicate with eUICC. However, if you have documentation about the QCOM protocol (used by Qualcomm old CPUs), you may implement this function by yourself.

@damonto I get it, thank you for your answers. ❤️