EM7430 not detecting SIM card on Tinker Board 3N (Debian 11)

[HaTo 0]

Hi everyone,

I'm currently trying to use LTE communication on the Tinker Board 3N.
To do this, I have added a 4G module (EM7430) and started testing. The OS recognizes the EM7430 module itself, but it does not seem to detect the SIM card.

Has anyone experienced a similar issue or know what could be causing this?

Environment:

• Tinker Board 3N

• Debian 11 (Kernel 5.10)

• OS version: V1.0.27

Any suggestions or advice would be greatly appreciated.
Thank you in advance!

[tooz 56]

hello @HaTo, 

i'm not sure if it's caused by the different design of sim pin in as it's not part of the qvl

if the card is recognised, perhaps you could ask the modem vendor for at commands for setup

[HaTo 0]

Hi @tooz,

Thanks a lot for your reply!

I’ve tried a few different SIM cards, but none of them are being recognized.

One thing I’m a bit unsure about is the connection between the M.2 B Key slot and the Nano SIM slot.
Do I need to change any hardware or software settings for the SIM to work?

Or should it just work automatically once the 4G module is installed and the SIM card is inserted?

Appreciate any advice you can share!

Best regards,

[tooz 56]

hello @HaTo, 

if you're using a supported lte module and it's recognised by the os, there's no extra work in order to make the module work. i tried to use a quectel em05 m.2 lte + sim to reproduce the issue and i'm not able to present the issue. (you can use command networkcli or the network manager on the top right to check if the lte is working) 

the design of nano sim slot connection of tinker board 3n follows the specifications of quectel lte modules. i'd recommend to check with quinton hazell for details, or try using another module that's officially supported: Tinker Board 

[HaTo 0]

Hi @tooz,

Thanks again for the detailed response and for testing with the EM05 module!

Good to know that the Tinker Board 3N’s SIM slot follows the Quectel spec.
I’ll double-check with Quinton Hazell and also try the tools you mentioned (networkcli and the network manager) to see if LTE is working properly.

Appreciate your help!

Best regards,