How to use the RG255C with ModemManager and qmicli

Technical Subjects Driver
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Please also add this in the script for ModemManager.

/lib/udev/rules.d/77-mm-quectel-port-types.rules

# Quectel RG255C
#  ttyUSB0 (if #0): QCDM/DIAG port
#  ttyUSB1 (if #1): GPS data port
#  ttyUSB2 (if #2): AT primary port
ATTRS{idVendor}=="2c7c", ATTRS{idProduct}=="0316", ENV{.MM_USBIFNUM}=="00", SUBSYSTEM=="tty", ENV{ID_MM_PORT_TYPE_QCDM}="1"
ATTRS{idVendor}=="2c7c", ATTRS{idProduct}=="0316", ENV{.MM_USBIFNUM}=="01", SUBSYSTEM=="tty", ENV{ID_MM_PORT_TYPE_GPS}="1"
ATTRS{idVendor}=="2c7c", ATTRS{idProduct}=="0316", ENV{.MM_USBIFNUM}=="02", SUBSYSTEM=="tty", ENV{ID_MM_PORT_TYPE_AT_PRIMARY}="1"