ha_uptime.yaml

---
# https://home-assistant.io/components/sensor.command_line/
- platform: command_line
  name: "HA Last Reboot"
  command: cat /proc/uptime | awk '{printf "%0.f", $1}'
  scan_interval: 60
  value_template: >-
    {% set uptime = value | int %}
    {% set seconds = uptime % 60 %}
    {% set minutes = ((uptime % 3600) / 60) | int %}
    {% set hours = ((uptime % 86400) / 3600) | int %}
    {% set days = (uptime / 86400) | int %}
    {%- if days > 0 -%}
      {%- if days == 1 -%}
        1 day
      {%- else -%}
        {{ days }} days
      {%- endif -%}
      {{ ', ' }}
    {%- endif -%}
    {{ '%02d' % hours }}:{{ '%02d' % minutes }}

- platform: command_line
  name: "HA Uptime"
  command: >
    echo "$(($(date +%s) - $(date -d
    "$(head -n1 /home/rob/.homeassistant/home-assistant.log |
    cut -d' ' -f-2)" +%s)))"
  scan_interval: 60
  value_template: >-
    {% set uptime = value | int %}
    {% set seconds = uptime % 60 %}
    {% set minutes = ((uptime % 3600) / 60) | int %}
    {% set hours = ((uptime % 86400) / 3600) | int %}
    {% set days = (uptime / 86400) | int %}
    {%- if days > 0 -%}
      {%- if days == 1 -%}
        1 day
      {%- else -%}
        {{ days }} days
      {%- endif -%}
      {{ ', ' }}
    {%- endif -%}
    {{ '%02d' % hours }}:{{ '%02d' % minutes }}