Trouble with SIM card when Fibocom FM101 and miniPCIe Adapter on Raspberry PI 4G/LTE Hat

Raspberry Pi Network HATs 3G/4G&LTE Base HAT
1

Hi

I’ve been trying to use the Raspberry Pi Hat with a M2 modem that I have but I have some trouble getting it to recognize the SIM card that is inserted on the HAT.
AT Commands work well but as soon as I try to ping the SIM (using AT+CPIN?), I get an error “SIM not inserted”.
I reckon this might have to do with the pretty atypical setup that I used to try this out (M2 modem → miniPCIe Adapter → Sixfab HAT) but this still is strange to me since the pinout of the adapter should be alright, and I can ping and see every info about the modem so most of it seems to work.

Here a picture of the setup :

IMG_4503
IMG_45031920×1440 304 KB

And the output from the AT commands :

image
image839×290 56.3 KB

For the full setup : RPi 4 on Bullseye, Fibocom FM101-EAU modem (QMI-enabled) (also tried with Intel-based Fibcom L850-GL), Sixfab Raspberry PI LTE Hat.

Thank you for any info that you have.

2

Hi,

Compare the pins of the module and adapter you are using with the pins connected to the Base HAT.

minipcie_basehar
minipcie_basehar777×820 38.2 KB

3

Hello,

Thank you for your input!
Effectively, I think there is a problem with the pinout. I haven’t been able to find the information for the adapter but that most likely seems to be the issue.
I will try finding a supported miniPCIe device that could work with the HAT. Thanks!