39: GPS Control

Currently only accessible from Viper devices. Used to interact with the device GPS service. In order to get GPS position data, you must used Position message (15).

Header

Field	Name	Description	Type
5	Method	Request a service to be perform an action Possible values: 1: SET— Set one or more values that are provided in the message payload. 2: GET— Get values for the associated message type. 3: SUBSCRIBE— Subscribe to values for the associated message type. Can be used in conjunction with other header fields to define the subscription parameters, such as Interval, Duration, Timeout, Storage Level and Message Level. If no interval is provided, messages will be sent as and when new data is available. Some data, such as GPS position, may require a set interval to be provided. 5: UNSUBSCRIBE— Unsubscribe from a previous subscription.	uint8

This is an extract of header fields that are relevant to this message type, you can find them all documented in the Headers section.

Payload

Field	Name	Description	Type	Unit
1	GPS is on	Status of the GPS, is it on?	bool
2	Corrections Enabled	Request and apply correction data to the GPS, such as RTK. Possible values: 0: Disabled 1: Full RTCM stream	uint8
3	Start Mode	Start mode of the GPS module. Possible values: 1: Normal 2: Cold 3: Warm 4: Hot	uint8

Code

For convenience, the following constants can be used to reference this message type.