farm-2.x-dev/modules/asset/sensor/modules/listener/farm_sensor_listener.routing.yml

farm_sensor_listener.data_stream:
  path: '/farm/sensor/listener/{public_key}'
  defaults:
    _controller: '\Drupal\farm_sensor_listener\Controller\SensorListenerController::publicKey'
  requirements:
    # There is no access restriction to this endpoint.
    _access: 'TRUE'
  methods: [GET, POST]