esphome/common/diag.yaml

---
button:
  - platform: restart
    name: "${friendly_devicename} Restart"
  - platform: safe_mode
    name: "${friendly_devicename} Safe Mode Boot"
    entity_category: diagnostic

sensor:
  - platform: uptime
    name: Uptime Sensor
    id: uptime_sensor
    update_interval: 60s
    on_raw_value:
      then:
        - text_sensor.template.publish:
            id: uptime_human
            state: !lambda |-
              int seconds = round(id(uptime_sensor).raw_state);
              int days = seconds / (24 * 3600);
              seconds = seconds % (24 * 3600);
              int hours = seconds / 3600;
              seconds = seconds % 3600;
              int minutes = seconds /  60;
              seconds = seconds % 60;
              return (
                (days ? to_string(days) + "d " : "") +
                (hours ? to_string(hours) + "h " : "") +
                (minutes ? to_string(minutes) + "m " : "") +
                (to_string(seconds) + "s")
              ).c_str();
  - platform: wifi_signal
    name: "${friendly_devicename} WiFi Signal"
    id: ${low_devicename}_wifi_signal
    update_interval: 60s
    entity_category: diagnostic
  # Reports the WiFi signal strength in %
  - platform: copy
    source_id: "${low_devicename}_wifi_signal"
    name: "${friendly_devicename} WiFi Strength"
    filters:
      - lambda: return min(max(2 * (x + 100.0), 0.0), 100.0);
    unit_of_measurement: "%"
    entity_category: diagnostic
  - platform: uptime
    name: Uptime

binary_sensor:
  - platform: status
    name: "${friendly_devicename} status"

text_sensor:
  - platform: version
    name: "${friendly_devicename} Version"
  - platform: template
    name: Uptime Human Readable
    id: uptime_human
    icon: mdi:clock-start
  - platform: wifi_info
    ip_address:
      name: IP Address
      entity_category: diagnostic