diagnostics example

/*
header: 
  seq: 7226
  stamp: 
    secs: 1549973072
    nsecs: 693197588
  frame_id: ''
status: 
  - 
    level: 0
    name: "husky_node: system_status"
    message: "System Status OK; Voltage OK; Temperature OK"
    hardware_id: "Husky A200-166"
    values: 
      - 
        key: "Uptime"
        value: "7249836"
      - 
        key: "Battery Voltage"
        value: "24.64"
      - 
        key: "Left Motor Driver Voltage"
        value: "22.58"
      - 
        key: "Right Motor Driver Voltage"
        value: "22.59"
      - 
        key: "MCU and User Port Current"
        value: "2.66"
      - 
        key: "Left Motor Driver Current"
        value: "0.63"
      - 
        key: "Right Motor Driver Current"
        value: "0.59"
      - 
        key: "Left Motor Driver Temp (C)"
        value: "27.69"
      - 
        key: "Right Motor Driver Temp (C)"
        value: "25.01"
      - 
        key: "Left Motor Temp (C)"
        value: "16.51"
      - 
        key: "Right Motor Temp (C)"
        value: "18.2"
  - 
    level: 0
    name: "husky_node: power_status"
    message: "Power System OK; Charge OK"
    hardware_id: "Husky A200-166"
    values: 
      - 
        key: "Charge (%)"
        value: "0.37"
      - 
        key: "Battery Capacity (Wh)"
        value: "480"
  - 
    level: 0
    name: "husky_node: safety_status"
    message: "Safety System OK"
    hardware_id: "Husky A200-166"
    values: 
      - 
        key: "Timeout"
        value: "False"
      - 
        key: "Lockout"
        value: "False"
      - 
        key: "Emergency Stop"
        value: "False"
      - 
        key: "ROS Pause"
        value: "False"
      - 
        key: "No battery"
        value: "False"
      - 
        key: "Current limit"
        value: "False"
  - 
    level: 0
    name: "husky_node: software_status"
    message: "Software OK"
    hardware_id: "Husky A200-166"
    values: 
      - 
        key: "ROS Control Loop Frequency"
        value: "9.92618"
*/
/*
osama@osama-Inspiron-N5110:~/dual_ws/src/joshua_code/diag_demo/src$ rosmsg show diagnostic_msgs/DiagnosticArray 
std_msgs/Header header
  uint32 seq
  time stamp
  string frame_id
diagnostic_msgs/DiagnosticStatus[] status
  byte OK=0
  byte WARN=1
  byte ERROR=2
  byte STALE=3
  byte level
  string name
  string message
  string hardware_id
  diagnostic_msgs/KeyValue[] values
    string key
    string value
*/