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#include <ros.h>
#include <std_msgs/String.h>
#include <std_srvs/Empty.h>

ros::NodeHandle nh;

bool messageCb(std_srvs::Empty::Request &req, std_srvs::Empty::Response &res) {
  digitalWrite(LED_BUILTIN, HIGH-digitalRead(LED_BUILTIN));   // blink the led
  
  nh.loginfo("LED is ON");

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tmux Cheat Sheet

Table of Contents

• General Usage
• Shortcuts
• Commands
• Scripting tmux
• Configuring tmux

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ivy_base_msgs:
  ubuntu: [ros-noetic-ivy-base-msgs]
ivy_base_pid:
  ubuntu: [ros-noetic-ivy-base-pid]
ivy_base_odometry:
  ubuntu: [ros-noetic-ivy-base-odometry]
ivy_base_teleop:
  ubuntu: [ros-noetic-ivy-base-teleop]
ivy_leaf_nav:
  ubuntu: [ros-noetic-ivy-leaf-nav]

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scp -r rpi:~/.config/tmuxinator/* .
scp -r . lgtm:~/.config/tmuxinator

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## old

/dev/sdb1: UUID="623C76353C7603F7" TYPE="ntfs" PARTUUID="348b9b11-01"
/dev/sdb2: UUID="65bc17f7-5c2c-4fab-8382-eb5c459da3be" TYPE="ext4" PARTUUID="348b9b11-02"
/dev/sdb3: UUID="ea03b3e8-eb11-46e8-9143-6e4e84b77bb3" TYPE="ext4" PARTUUID="348b9b11-03"
/dev/sdb5: UUID="6df44fbe-af34-4af4-a26b-81cb1ee6406f" TYPE="ext4" PARTUUID="348b9b11-05"
/dev/sdb6: UUID="6fa60236-4737-4aa5-ae6e-c80165718cdc" TYPE="swap" PARTUUID="348b9b11-06"

## new

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https://github.com/cilynx/rtl88x2BU_WiFi_linux_v5.3.1_27678.20180430_COEX20180427-5959

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Checking log directory for disk usage. This may take awhile.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://10.42.0.1:37181/

SUMMARY
========

PARAMETERS

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install clion via snap

snap will auto update the app

snap install clion

in config/options/project.default.xml

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export ROSCONSOLE_FORMAT='[${severity}] [${time}] [${function}]: ${message}'

change to debug

cp /opt/ros/melodic/share/ros/config/rosconsole.config ~/rosconsole.config

export ROSCONSOLE_CONFIG_FILE=~/rosconsole.config

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