====== LTE modem ======

The LTE modem is build in the Patron **S167**, **M267** and **M567** units. 

The ''[[https://repo.unipi.technology/debian/pool/main/u/unipi-lte/|unipi-lte]]'' package, which makes the use of an LTE modem available, also includes a virtual serial line for communication with the modem via {{ :en:hw:007-patron:quectel_ec200x_eg912y_eg915n_series_at_commands_manual_v1.2.pdf |AT commands}}. Modem settings could be managed  for example, by the [[https://salsa.debian.org/minicom-team/minicom|minicom]] program, directly from the unit's Linux console ([[en:automation:unipi-ssh-connect-hidden|by SSH access]]). 

In the control SW (Node-RED, etc.) the serial line can be used, for example, to send and receive SMS messages or calls.

| Modem's serial line for AT commands         | /dev/ttyLTE_AT1  |

Since this is a **virtual** serial line, communication parameters (baudrate, parity, etc.) can be selected arbitrarily.