Subscribe to navigation updates
When you have obtained a navigation id through the startNavigation mutation, you can start a navigation subscription to get the turn-by-turn instructions and other subscription details. As the vehicle is approaching a charge station, a lot can happen. Therefore, we recommend subscribing to a navigation session to push updates to the navigation app when necessary. Updates can be triggered, for example, when all connectors are occupied at the planned charge stop or if the end-user takes a wrong exit. In both cases, a reroute will be triggered.
By subscribing to a navigation session, updates are pushed to the navigation app when necessary.
Subscription
The subscription service needs to be initiated with a navigation ID. From there on it will start a navigation session and provide you with updates.
Listen to the route id
When starting the subscription always include the route_id field. Whenever this value changes the navigation application needs to re-render the polyline. This id is updated when, for example, a wrong exit is taken and the recalculateNavigation mutation is called.
Supported turn-by-turn providers
The instructions field accepts three field arguments. The instructions_format accepts two values: MapboxV5 which returns the turn-by-turn instructions mapped for the latest Mapbox SDK and Chargetrip which can be used to map the instructions to a mapping provider that we do not yet officially support. Official support for more providers is on its way. The language argument currently accepts English and precision will encode the polyline with coordinates that either have 5 or 6 decimals.
For more information about upcoming providers and languages get in touch!
Arguments
id • ID
• Required
Frequently used fields
route_id • ID
The current route used for navigation
state • NavigationState
The state of a navigation session. The status can be driving, charging, finished, or error
Show NavigationState enum values
state_of_charge • Float
State of charge at the last known location
Show arguments
next_station • NavigationStation
Next charging station
alternative_stations • NavigationStation
A set of alternative charging stations to next station
instructions • JSON
Navigation instructions
Other fields
id • ID
ID of the navigation session
route_alternative_id • ID
The current route alternative used for navigation
last_known_location • Point
Last known location
Response
A response can either contain a data or an
errors object. The response header will always return
200 as a status code.
Data object
When successful, a data object will be returned with the
requested fields. If there are no fields present the
data object will return the operation name with the
appropriate return type. If the operation was a query, this output
will be an object of the schema’s query root type; if the operation
was a mutation, this output will be an object of the schema’s mutation
root type.
Error object
If unsuccessful, an errors object will be returned with
more details in the extensions object. The error object
can contain any of the following objects.
NAVIGATION_INVALID_MAPPING_LANGUAGE
Mapping language is not valid
NAVIGATION_INVALID_MAPPING_PROVIDER
Mapping provider is not valid
NAVIGATION_INVALID_ROUTE_STATUS
Cannot generate instructions mapping for route with status '$ROUTESTATUS'
NAVIGATION_NOT_FOUND
No navigation session was found with the provided ID
NAVIGATION_TRANSLATOR_NOT_FOUND
Translator for language "$LANGUAGE" was not found or loaded in the translators list
ROUTE_POLYLINE_INVALID_DECIMALS
Value for decimals number is not valid. Allowed values are 5 or 6