• Configure the receiver to put out the GPS GGA message over the serial port A
  • Connect with the javad software OEM software ( been using Netview )
  • Use the console and attach and send this command

    %%em,/dev/ser/a,/msg/nmea/GGA:1

I had this same problem outlined here: https://forum.manjaro.org/t/modemmanager-mobile-broadband-adapter-not-supported-anymore/45268

Trying to use a Keyspan 19HS USB to Serial adapter

1. Create this file for the modem manager
   1. Edit this file

      sudo nano /lib/udev/rules.d/78-mm-whitelist-internal-modem.rules

   2. Put these contents in it

      ACTION!="add|change|move", GOTO="mm_whitelist_internal_modem_end"
          ATTRS{idVendor}=="06cd", ATTRS{idProduct}=="0121", ENV{ID_MM_DEVICE_PROCESS}="1"
          LABEL="mm_whitelist_internal_modem_end"

2. Restart the service

   sudo udevadm control --reload
   sudo udevadm trigger

3. I ended up rebooting but probably wasn't nececssary

To talk to the javad

sudo minicom /dev/ttyUSB0  # should not need sudo to do this if in correct group

I also added hdl user to the dialin group with the following command

sudo adduser hdl dialout