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Version: ROS 2 Humble

Garmin GPS 18x

Item Numbers

DescriptionCPR ItemSales KitInstallation Kit, With Fasteners
Garmin GPS 18x sensor, 5 Hz001893028876028875


Mass165 kg
Voltage, Minimum4 V
Voltage, Maximum5.5 V
Voltage, Sensor5 V
Power, Average0.5 W
DataTIA-232-F ( RS-232 )
Default setting is 19200 baud
View, VerticalUnknown
Position Accuracy15 m
Position Accuracy RTK (requires a Base Station or a positioning-service)Unknown
Ingress Protection, SolidsUnknown ( assume 6 )
Ingress Protection, Liquids7
Operating Temperature, Min-30 °C
Operating Temperature, Max80 °C

Software Bringup

This sensor is included in the Clearpath Robotics robot package that is installed on all of our robots. This allows you to add or remove the sensor from your robot's software description by modifying the robot configuration yaml.

- model: garmin_18x
urdf_enabled: true
launch_enabled: true
parent: base_link
xyz: [0.0, 0.0, 0.0]
rpy: [0.0, 0.0, 0.0]
frame_id: gps_0_link
port: "/dev/clearpath/gps"
baud: 115200

Package and Setup

The Garmin 18x GPS sensor uses the nmea_navsat_driver ROS 2 driver. The driver is open source, maintained by the community, and hosted on GitHub.

For specifics on the way Clearpath's configuration system launches the sensor driver, see the Garmin 18x launch file and the default parameter file in clearpath_sensors.

Device Path

The port ROS parameter must be set to the device path of the Garmin 18x. To simplify this process, use the /dev/clearpath/gps path. This path is only available when the Clearpath robot UDEV rules are installed. These are installed alongside the clearpath_robot package. If the receiver is connected, but the /dev/clearpath/gps device is not, check the file /lib/udev/rules.d/60-ros-humble-clearpath-robot.rules exists.


Clearpath is committed to your success. Please get in touch with us and we will do our best to get you rolling again quickly:

To get in touch with a salesperson regarding Clearpath Robotics products, please email

If you have an issue that is specifically about ROS and is something which may be of interest to the broader community, consider asking it on If you do not get a satisfactory response, please ping us and include a link to your question as posted there. If appropriate, we will answer in the ROS Answers context for the benefit of the community.

Further Reading

  1. Clearpath Robotics Store
  2. User Manual
  3. Swift Navigation Website
  4. ROS webpage