Saved Pi setup for GSPd and QtGPS

pi/etc/default/gpsd

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+# Default settings for the gpsd init script and the hotplug wrapper.
+
+# Start the gpsd daemon automatically at boot time
+START_DAEMON="true"
+
+# Use USB hotplugging to add new USB devices automatically to the daemon
+USBAUTO="true"
+
+# Devices gpsd should collect to at boot time.
+# They need to be read/writeable, either by user gpsd or the group dialout.
+DEVICES="/dev/ttyACM0"
+
+# Other options you want to pass to gpsd
+GPSD_OPTIONS="-G"

pi/etc/systemd/system/multi-user.target.wants/gpsd.service

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+[Unit]
+Description=GPS (Global Positioning System) Daemon
+Requires=gpsd.socket
+# Needed with chrony SOCK refclock
+After=chronyd.service
+
+[Service]
+Type=forking
+EnvironmentFile=-/etc/default/gpsd
+ExecStart=/usr/sbin/gpsd $GPSD_OPTIONS $DEVICES
+
+[Install]
+WantedBy=multi-user.target
+Also=gpsd.socket
+

pi/etc/systemd/system/sockets.target.wants/gpsd.socket

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+[Unit]
+Description=GPS (Global Positioning System) Daemon Sockets
+
+[Socket]
+ListenStream=
+ListenStream=/var/run/gpsd.sock
+ListenStream=[::1]:2947
+ListenStream=0.0.0.0:2947
+SocketMode=0600
+
+[Install]
+WantedBy=sockets.target