The required UART drivers are usually distributed as part of the Linux kernel since v4.4.132.
Check whether the required kernel module is loaded:
lsmod | grep option.Check whether you have read/write access to USB-UART bridge:
ls -la /dev/ttyUSB*.
With the Minicom app
Step 1: Install Minicom
sudo apt install minicom
Step 2: User must belong to the 'dialout' group
Check with:
groups USERNAME
If dialout is not listed then:
sudo usermod -aG dialout USERNAME
For the changes to take effect, log off the user and log on again
Step 3: Then you can connect to the device:
minicom -D /dev/ttyUSB1
Step 4: Send AT Command to USB Connect LPWA
ATI
Step 5: Wait of response from USB Connect LPWA
Manufacturer: u-blox Model: SARA-R410M-02B Revision: L0.0.00.00.05.08 [Apr 17 2019 19:34:02] SVN: 03 IMEI: 352753099064196 OK
Useful link:
https://wiki.emacinc.com/wiki/Getting_Started_With_Minicom
Linux setup & troubleshooting
Currently, the ModemManager package (confirmed for version 1.10.0-1~ubuntu18.04.2) detects the USB Connect LPWA (R410) as a general QMI-WWAN modem and tries to configure it. Besides failing this task it blocks any "user" AT commands, e.g. using minicom.
The following shell commands stop and disable the ModemManager service:
