These modules provide access to the HiLink API which is not the same as accessing the dongle through AT commands over a serial device.
The API allows you read and send SMS messages, start and stop your data connection and monitor your data usage. HiPi::Huawei::E3531 provides the interface for the only currently tested USB device.
Create a new instance of the class
use HiPi::Huawei::Modem; my $hlink = HiPi::Huawei::Modem->new();