GPS with turtlebot3

[YXGuan]

ISSUE TEMPLATE ver. 0.4.0

1. Which TurtleBot3 platform do you use?

   • [X] Burger
   • [ ] Waffle
   • [ ] Waffle Pi

2. Which ROS is working with TurtleBot3?

   • [ ] ROS 1 Kinetic Kame
   • [ ] ROS 1 Melodic Morenia
   • [X] ROS 1 Noetic Ninjemys
   • [ ] ROS 2 Dashing Diademata
   • [ ] ROS 2 Eloquent Elusor
   • [ ] ROS 2 Foxy Fitzroy
   • [ ] etc (Please specify your ROS Version here)

3. Which SBC(Single Board Computer) is working on TurtleBot3?

   • [ ] Intel Joule 570x
   • [ ] Raspberry Pi 3B+
   • [X] Raspberry Pi 4
   • [ ] etc (Please specify your SBC here)

4. Which OS you installed on SBC?

   • [X] Raspbian distributed by ROBOTIS
   • [ ] Ubuntu MATE (16.04/18.04/20.04)
   • [ ] Ubuntu preinstalled server (18.04/20.04)
   • [ ] etc (Please specify your OS here)

5. Which OS you installed on Remote PC?

   • [ ] Ubuntu 16.04 LTS (Xenial Xerus)
   • [ ] Ubuntu 18.04 LTS (Bionic Beaver)
   • [X] Ubuntu 20.04 LTS (Focal Fossa)
   • [ ] Windows 10
   • [ ] MAC OS X (Specify version)
   • [ ] etc (Please specify your OS here)

6. Specify the software and firmware version(Can be found from Bringup messages)

   • Software version: [x.x.x]
   • Firmware version: [1.2.6]

7. Specify the commands or instructions to reproduce the issue. I installed nmea_navsat_driver on turtlebot sudo apt-get install ros-noetic-nmea-navsat-driver

   • sudo chmod 777 /dev/ttyUSB1
   • rosrun nmea_navsat_driver nmea_serial_driver _port:=ttyUSB1 _baud:=9600
   • roslaunch turtlebot3_bringup turtlebot3_robot.launch

8. Copy and Paste the error messages on terminal.

   Expect to have a GPS/Fix, but actually have no readings

9. Please describe the issue in detail.

   Hi there, I would appreciate some help for setting up a GPS sensor with Turtlebot3. Thank you Do I need to modify the turtlebot_bringup file?

   It can see the USB port but there's no readings

[YXGuan]

The above question has been resolved. However I got a new question, does Turtlebot3 come with a magnetic field sensor? ( or only IMU?)

magnetic_field_covariance: [0.004800000227987766, 0.0, 0.0, 0.0, 0.004800000227987766, 0.0, 0.0, 0.0, 0.004800000227987766] 

--- 

header:  

  seq: 70 

  stamp:  

    secs: 1660339774 

    nsecs: 447851036 

  frame_id: "mag_link" 

magnetic_field:  

  x: 0.0 

  y: 0.0 

  z: 0.0 

[YXGuan]