SIM7670 4G Module

vic

Is there any documentation on this thing? How would I go about using it on a fresh OS installation? It's not detected with lsusb, I don't see any hints that it's picked up by the OS at all in dmesg output. I know the modem works because I can see it if I boot the OS that came with my 7"-pi-touchscreen CM4 system.

Jennie

Hello Vic,

You can find tty devices in the /dev directory
1.bash：
ls /dev/tty*
This lists all devices with names starting with 'tty' under '/dev'.
2.bash:
dmesg | grep tty

Let me know if you need further assistance with any of these steps!

vic

@Jennie said:
You can find tty devices in the /dev directory
1.bash：
ls /dev/tty*
This lists all devices with names starting with 'tty' under '/dev'.
2.bash:
dmesg | grep tty

This only works with the OS that came with the elecrow panel. If I install a fresh version of Debian for Raspberry Pi, it's as if the device doesn't exist: no hint of the device in dmesg, no /dev/ttyACM*, and lsusb doesn't show "ID 05c6:9330 Qualcomm, Inc. QualComm Compo".

The OS that comes with the Elecrow panel is "Linux raspberrypi 6.1.21-v8+", Debian version 11.9. verses a fresh installation is "Linux raspberrypi 6.6.51-rpt-rpi-v8", Debian version 12.7.

I've tried loading modules and probing for devices with modemmanager (mmcli) without any luck. There's got to be some kind of driver or initialization.

$ mmcli --list-modems
No modems were found

Jennie

Hi @vic,
1.As the 4G module needs to do power-on timing processing, this aspect is made into a script and this script is required to autostart , so in the image we provide there is this boot up script, but because the new image does not have this script, so the 4G module can not work.
2.The link below contains the startup script for the 4G module. It only needs to be powered up and given a high-level signal to the 4G module. You can install it on a fresh OS.
https://we.tl/t-Fb2T7swnWq

Please let me know if you have any questions.