I am trying to bring a Sierra Wireless HL7588 chip online. The HL7588 creates a ttyACM under /dev, rather than ttyUSB. The /dev/cdc-wdm0 handle does not get created. I am able to connect to the ttyACM0 handle and send AT commands to the chip, so OpenWRT is able to communicate with the device.
Since the cdc-wdm0 is not created the qmi interface is not active and there is no active connection created with the carrier and no IP allocated.
Can anyone provide some guidance on what is missing in the configuration to bring this chip up on QMI?