Question about $ cd linorobot2/linorobot2_navigation/maps

[oto moov]

Greetings and good day. Thank you for your help and contribution to linorobot2.

my specifications:

1. Raspberry pi 4B 4GB

2. Ubuntu budgie 22.04

3. Teensy 4.0 microcontroller 

4. GY85 IMU

5. Rplidar A1M8,  https://github.com/babakhani/rplidar_ros2

6. Cytron 225rpm motor with encoder

7. Cytron motor driver mdd10a

Rviz + Lidar is ok, teleop is ok. I was able to remote control my machine using android with termux, wifi, ssh.

$ ros2 run teleop_twist_keyboard teleop_twist_keyboard

I have a question regarding "3.3 Save the map"

$ cd linorobot2/linorobot2_navigation/maps
$ ros2 run nav2_map_server map_saver_cli -f <map_name> --ros-args -p save_map_timeout:=10000

in https://github.com/linorobot/linorobot2/tree/humble

How to get "linorobot2/linorobot2_navigation/maps" ?

Please point me to the tutorial step that I might miss. Thank you.

currently, the workspace I have is,

linorobot2_ws

linorobot2_hardware

[oto moov]

Update: I decide to,

$ git clone -b $ROS_DISTRO https://github.com/linorobot/linorobot2

then,

$ cd linorobot2/linorobot2_navigation/maps
$ ros2 run nav2_map_server map_saver_cli -f myHome --ros-args -p save_map_timeout:=10000.

result: map saved successfully,

I got these errors:

[rviz2-2] [ERROR] [1660808425.856358531] [rviz2]: Lookup would require extrapolation into the future.  Requested time 1660808425.895145 but the latest data is at time 1660808425.825000, when looking up transform from frame [laser] to frame [map]

Does anyone know what causing this error and solution?

[oto moov]

solved, here's what I did

for mapping:

terminal 1

$ ros2 launch linorobot2_bringup bringup.launch.py

terminal 2

$ ros2 launch linorobot2_navigation slam.launch.py

terminal 3

$ ros2 launch linorobot2_viz slam.launch.py

terminal 4

$ ros2 run teleop_twist_keyboard teleop_twist_keyboard

terminal 5

$ mkdir maps

$ cd maps

$ ros2 run nav2_map_server map_saver_cli -f myhome --ros-args -p save_map_timeout:=10000.