EC21 LTE Modem quectel-CM connection failed

IoT Modules LTE Standard Module
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1

hello.
I am trying to use EC21 LTE Modem connected to SBC (Hardkernel’s ODROID-C4) via USB.
I built and registered Linux kernel environment settings and drivers according to the vendor’s guide, but the following error continues.
uname -a : Linux odroid 4.9.337-90

download
download1348×816 234 KB

Screenshot at 2023-06-09 08-12-38
Screenshot at 2023-06-09 08-12-38937×200 35 KB

Screenshot at 2023-06-09 08-12-56
Screenshot at 2023-06-09 08-12-56794×192 39.9 KB

Screenshot at 2023-06-09 08-13-45
Screenshot at 2023-06-09 08-13-451406×944 161 KB

2

Hi @Engineer
Can you give me your email, I will send you the latest driver, you try with the latest driver, because from the screenshot to see the system did not recognize the module. If the USB connection is OK, it may still be a driver problem.