RaspberryPi 4 + Telit LE910C4-NF

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

Hello,

I’m wondering if anyone can offer some tips for a relatively inexperienced person.

I have a raspberryPi 4 and the LTE kit with the Telit LE910C4-NF modem.

I followed the tutorial to install the CORE installation, but my modem is not connecting. It appears to be cycling connecting and disconnecting from USB.
Any help would be appreciated.

RaspberryPi 4 w/ Telit LE910C4-NF

user@ds-67aaab02:~ $ cat /etc/os-release
PRETTY_NAME=“Raspbian GNU/Linux 10 (buster)”
NAME=“Raspbian GNU/Linux”
VERSION_ID=“10”
VERSION=“10 (buster)”
VERSION_CODENAME=buster
ID=raspbian
ID_LIKE=debian

user@ds-67aaab02:~ $ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 001 Device 013: ID 1bc7:1203 Telit Wireless Solutions
Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

user@ds-67aaab02:~ $ lsusb -t
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 5000M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/1p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
|__ Port 3: Dev 13, If 0, Class=Communications, Driver=rndis_host, 480M
|__ Port 3: Dev 13, If 1, Class=CDC Data, Driver=rndis_host, 480M
|__ Port 3: Dev 13, If 2, Class=Vendor Specific Class, Driver=option, 480M
|__ Port 3: Dev 13, If 3, Class=Vendor Specific Class, Driver=, 480M
|__ Port 3: Dev 13, If 4, Class=Vendor Specific Class, Driver=option, 480M
|__ Port 3: Dev 13, If 5, Class=Vendor Specific Class, Driver=option, 480M
|__ Port 3: Dev 13, If 6, Class=Vendor Specific Class, Driver=option, 480M
|__ Port 3: Dev 13, If 7, Class=Vendor Specific Class, Driver=option, 480M
|__ Port 4: Dev 4, If 1, Class=Human Interface Device, Driver=usbhid, 12M
|__ Port 4: Dev 4, If 2, Class=Human Interface Device, Driver=usbhid, 12M
|__ Port 4: Dev 4, If 0, Class=Human Interface Device, Driver=usbhid, 12M

user@ds-67aaab02:~ $ dmesg | grep ttyUSB
[ 11.458104] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB0
[ 11.477003] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB1
[ 11.478824] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB2
[ 11.481492] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB3
[ 11.497201] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB4
[ 116.706746] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 116.707239] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 116.708081] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 116.709085] option1 ttyUSB3: GSM modem (1-port) converter now disconnected from ttyUSB3
[ 116.709522] option1 ttyUSB4: GSM modem (1-port) converter now disconnected from ttyUSB4
[ 127.145033] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB0
[ 127.147137] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB1
[ 127.148077] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB2
[ 127.149031] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB3
[ 127.149958] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB4
[ 223.493482] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 223.494184] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 223.495233] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 223.495755] option1 ttyUSB3: GSM modem (1-port) converter now disconnected from ttyUSB3
[ 223.496270] option1 ttyUSB4: GSM modem (1-port) converter now disconnected from ttyUSB4
[ 233.889445] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB0
[ 233.891645] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB1
[ 233.892499] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB2
[ 233.893818] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB3
[ 233.895065] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB4
[ 328.206140] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 328.206763] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 328.207281] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 328.208171] option1 ttyUSB3: GSM modem (1-port) converter now disconnected from ttyUSB3
[ 328.208917] option1 ttyUSB4: GSM modem (1-port) converter now disconnected from ttyUSB4
[ 338.608867] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB0
[ 338.613943] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB1
[ 338.614831] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB2
[ 338.615651] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB3
[ 338.616556] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB4
[ 434.995646] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 434.997081] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 434.998341] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 434.999462] option1 ttyUSB3: GSM modem (1-port) converter now disconnected from ttyUSB3
[ 435.000570] option1 ttyUSB4: GSM modem (1-port) converter now disconnected from ttyUSB4
[ 445.389009] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB0
[ 445.392391] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB1
[ 445.393510] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB2
[ 445.394467] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB3
[ 445.399276] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB4
[ 542.014468] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
[ 542.015087] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1
[ 542.020952] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2
[ 542.021529] option1 ttyUSB3: GSM modem (1-port) converter now disconnected from ttyUSB3
[ 542.022420] option1 ttyUSB4: GSM modem (1-port) converter now disconnected from ttyUSB4
[ 552.408372] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB0
[ 552.413856] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB1
[ 552.414971] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB2
[ 552.415979] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB3
[ 552.416957] usb 1-1.3: GSM modem (1-port) converter now attached to ttyUSB4

2

Hi @dkelly ,

Change the modem composition by running the command atcom --port /dev/ttyUSB2 AT#USBCFG=4 and wait at least 2 minutes for the connection to be established.

3

Hello ensar,

Thank you for the response.
When Run the AT command ERROR is returned.
Looking at the manual it seems like this is returned when the modem is already configured to use that composition.
When I run the AT#USBCFG? command, it shows that is indeed the case, and the modem is using composition 4.
See below

user@ds-67aaab02:~ $ sudo atcom --port /dev/ttyUSB2 AT#USBCFG=4

ERROR

user@ds-67aaab02:~ $ sudo atcom --port /dev/ttyUSB2 AT#USBCFG?

#USBCFG: 4

OK

user@ds-67aaab02:~ $