snmp-trap-deactivates-lan-port.yaml

blueprint:
  name: SNMP - trap deactivates lan port
  description: Recieved SNMP port down trap deactivates the LAN port to prevent
    unauthorized change of LAN devices.
  domain: automation
  input:
    source_ip:
      name: SNMP trap source IP address
      description: IP address to distinguish multiple devices
      selector:
        text:
    port_number:
      name: LAN port number
      description: The LAN port number that the entity is controlling.
      selector:
        number:
          min: 1
          max: 48
          mode: box
    port_entity:
      name: LAN port entity
      description: The LAN port entity that shall be controlled.
      selector:
        entity:
          domain: switch
    notify_device:
      name: Mobile Device
      description: Select a device that runs the official Home Assistant app to receive notifications. If you wish to notify a group of devices use the field below to override this selection. This can be left blank in that case
      default: false
      selector:
        device:
          integration: mobile_app
    notify_group:
      name: Notification Group
      description: The name of the group to send notifications to. If set, this will override individual devices above.
      default: ""
  source_url: https://gist.github.com/aschamberger/0ab0bd03561288cbb2ab079cad8f8a86
mode: parallel
max_exceeded: silent
variables:
  port_number: !input 'port_number'
  port_entity: !input 'port_entity'
  group: !input notify_group
  group_target: "{{ group | lower | replace('notify.', '') | replace(' ','_') }}"
  notify_device: !input 'notify_device'
trigger:
- platform: event
  event_type: snmp_trap
  event_data:
    _trap_oid: 1.3.6.1.6.3.1.1.5.3
    _source: !input 'source_ip'
  id: snmp_trap
condition:
- condition: template
  value_template: >-
    {{ trigger.event.data["1.3.6.1.2.1.2.2.1.1."+port_number|string] is defined }}
action:
- service: switch.turn_off
  data: {}
  target:
    entity_id: !input 'port_entity'
- choose:
  - conditions: "{{ notify_device and not group_target }}"
    sequence:
      - device_id: !input notify_device
        domain: mobile_app
        type: notify
        title: "SNMP port down trap notification"
        message: "{{ state_attr(port_entity, 'friendly_name') }}"
  - conditions: "{{ group_target }}"
    sequence:
      - service: "notify.{{ group_target }}"
        data:
          title: "SNMP port down trap notification"
          message: "{{ state_attr(port_entity, 'friendly_name') }}"