I have a problem with modemmanager. I have a huawei e3372h usb stick lte and the arduino IDE. When I want to upload a code to arduino ,I get an error (---> port is busy). But when I write in terminal this command: sudo apt-get purge --auto-remove modemmanager ,then I have no more problems as about arduino IDE. But when I want to have internet connection from Huawei E3372H usb stick ,I can't ,because I maybe have to install modemmanager. So,I have this conflict. What should I do to solve this problem/conflict ???
~ Ubuntu 18.04 ~ Arduino IDE 1.8