Events and messages describe what happened on a metering device: event/error archives read from the device,
and the reference of message codes (names and descriptions) linked to device types and archive types. Use these
endpoints to read event archives, list device messages, and retrieve a single device message.

## Message export procedure

To export message (event/error) codes for given `equipment_type_id` and/or `archive_type_id`:

1. Get the list of metering device types via [Meter types](/en/api/v1/directories/meter-types). `equipment_type_id` is also available in the [metering units list](/en/api/v1/metering-units/list-metering-units) or for a [single unit](/en/api/v1/metering-units/get-metering-unit).
2. Export messages by `equipment_type_id`: `…/message_equipment_types?equipment_type_id=:equipment_type_id`.
3. Narrow the selection by `archive_type_id` once the broader set is exported: `…/message_equipment_types?equipment_type_id=:equipment_type_id&archive_type_id=:archive_type_id`.