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83 lines
2.7 KiB
ReStructuredText
Exposure Notification Listener
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==============================
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.. seo::
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:description: Instructions for setting up exposure notification listeners for ESPHome.
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:image: exposure_notifications.png
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The ``exposure_notifications`` component uses the :doc:`/components/esp32_ble_tracker` to discover
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nearby COVID-19 exposure notification bluetooth messages sent by phones running the
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`Google/Apple Exposure Notification service <https://www.google.com/covid19/exposurenotifications/>`__.
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.. code-block:: yaml
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# Example configuration entry
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esp32_ble_tracker:
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exposure_notifications:
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on_exposure_notification:
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then:
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- lambda: |
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ESP_LOGD("main", "Got notification:");
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ESP_LOGD("main", " RPI: %s", hexencode(x.rolling_proximity_identifier).c_str());
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ESP_LOGD("main", " RSSI: %d", x.rssi);
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Configuration variables:
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------------------------
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- **on_exposure_notification** (*Optional*, :ref:`Automation <automation>`): An automation
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to run when an exposure notification bluetooth message is received.
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A variable ``x`` of type :apistruct:`exposure_notifications::ExposureNotification` is passed to the automation.
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An exposure notification payload contains:
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- Rolling proximity identifier (RPI): A 16-byte long value used to identify a given device in a 10-minute window.
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- Associated encrypted metadata (AEM): Additional encrypted metadata, like transmit power.
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Because the GAEN framework is designed to prevent tracking an individual, this data can essentially
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only be used to check whether a device with enabled exposure notifications is nearby (and to limited degree
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also count them).
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Indicator of device with exposure notifications
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-----------------------------------------------
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The following configuration can be used as an indicator whether an exposure-notifications
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enabled device is nearby. As long as an exposure notification has been received in the last
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minute, the indicator will be on.
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.. code-block:: yaml
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esp32_ble_tracker:
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switch:
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- platform: gpio
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pin: GPIO22
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id: led
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script:
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- id: start_led
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then:
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- switch.turn_on: led
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- delay: 1min
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- switch.turn_off: led
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exposure_notifications:
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on_exposure_notification:
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then:
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- lambda: |
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ESP_LOGD("main", "Got notification:");
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ESP_LOGD("main", " RPI: %s", hexencode(x.rolling_proximity_identifier).c_str());
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ESP_LOGD("main", " RSSI: %d", x.rssi);
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# Stop existing timer so that turn_off doesn't get called
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- script.stop: start_led
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- script.execute: start_led
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See Also
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--------
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- :doc:`esp32_ble_tracker`
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- :apiref:`exposure_notifications/exposure_notifications.h`
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- :ghedit:`Edit`
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