home-assistant-configuration/config/packages/zigbee2mqtt.yaml

# input_boolean:
#   zigbee_permit_join:
#     name: Allow devices to join
#     initial: off
#     icon: mdi:cellphone-wireless

# timer:
#   zigbee_permit_join:
#     name: Time remaining
#     duration: 600 # Updated this to the number of seconds you wish

# sensor:
#   - platform: mqtt
#     name: Bridge state
#     state_topic: "homeassistant/bridge/state"
#     icon: mdi:router-wireless

# automation:
#   - id: enable_zigbee_join
#     alias: Enable Zigbee joining
#     trigger:
#       platform: state
#       entity_id: input_boolean.zigbee_permit_join
#       to: 'on'
#     action:
#     - service: mqtt.publish
#       data:
#         topic: homeassistant/bridge/config/permit_join
#         payload: 'true'
#     - service: timer.start
#       data:
#         entity_id: timer.zigbee_permit_join
#   - id: disable_zigbee_join
#     alias: Disable Zigbee joining
#     trigger:
#     - entity_id: input_boolean.zigbee_permit_join
#       platform: state
#       to: 'off'
#     action:
#     - data:
#         payload: 'false'
#         topic: homeassistant/bridge/config/permit_join
#       service: mqtt.publish
#     - data:
#         entity_id: timer.zigbee_permit_join
#       service: timer.cancel
#   - id: disable_zigbee_join_timer
#     alias: Disable Zigbee joining by timer
#     trigger:
#     - platform: event
#       event_type: timer.finished
#       event_data:
#         entity_id: timer.zigbee_permit_join
#     action:
#     - service: mqtt.publish
#       data:
#         topic: homeassistant/bridge/config/permit_join
#         payload: 'false'
#     - service: input_boolean.turn_off
#       data:
#         entity_id: input_boolean.zigbee_permit_join