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--- code:work:lvisf:2022:gpsgga:start [2022/08/26 21:26] – created david
+++ code:work:lvisf:2022:gpsgga:start [2022/08/26 21:28] (current) – david
@@ Line 8: / Line 8: @@
 %%em,/dev/ser/a,/msg/nmea/GGA:1
 </code>
+==== Serial Port Adapter ====
+I had this same problem outlined here:  [[https://forum.manjaro.org/t/modemmanager-mobile-broadband-adapter-not-supported-anymore/45268]]
+Trying to use a [[https://www.tripplite.com/keyspan-high-speed-usb-to-serial-adapter~USA19HS|Keyspan 19HS USB to Serial adapter]]
+  - Create this file for the modem manager
+    - Edit this file <code>
+sudo nano /lib/udev/rules.d/78-mm-whitelist-internal-modem.rules
+</code>
+    - Put these contents in it <code>
+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"
+</code>
+  - Restart the service <code>
+sudo udevadm control --reload
+sudo udevadm trigger
+</code>
+  - I ended up rebooting but probably wasn't nececssary
+To talk to the javad <code>
+sudo minicom /dev/ttyUSB0  # should not need sudo to do this if in correct group
+</code>
+I also added **hdl** user to the dialin group with the following command
+<code>
+sudo adduser hdl dialout
+</code>
+  * **libserialport** <code>
+sudo apt update
+sudo apt install libserialport-dev
+</code>