Before you can send commands, you must establish a handshake between your PC and the device. Install Drivers:
Accessing the Huawei modem terminal gives you the keys to the kingdom—and the power to break it. huawei modem terminal
#!/bin/bash # Query signal and network info from Huawei E3372 DEV="/dev/ttyUSB0" stty -F $DEV 115200 Beyond the Web Interface: Unlocking the Full Power