Auto
Facility that provides control of automatic connection for drone and remote control devices.
The goal of auto-connection is to ensure that exactly one remote control and exactly one drone are connected whenever it is possible to do so, based on rules as described below.
GroundSdk may be configured so that auto-connection is started automatically once the first session is opened. This behaviour is enabled by setting auto_connection_at_startup configuration flag to true, and disabled (which is the default) by setting this flag to false.
Auto-connection may also be started and stopped manually though this Facility API. Note however that, in any case, auto-connection is stopped as soon as the last opened GroundSdk session is closed.
To chose which device will get connected, visible remote control devices are sorted by connector technology: USB is considered better than Wifi, which is considered better than Bluetooth Low-Energy. The best available remote control is picked up according to this criteria and will be auto-connected.
Also, if the best available remote control is currently connected (or connecting) and an even better connector becomes available for it, then it will be auto-reconnected (that is, disconnected, then connected again) using this better connector.
Drone auto-connection When started, auto-connection will try to always maintain at least one, and only one drone connected.Two different cases must be distinguished:
- When no remote control is currently connected, then drone auto-connection behaves like remote control auto-connection: drones are sorted by connector technology and the drone with best technology is elected for auto-connection. Auto-reconnection using an even better connector may also happen, as for remote control devices.
- When a remote control is connected (or connecting), then auto-connection will ensure that no drones are connected through any other connector (including local ones: WIFI or BLE) than this remote control. Any drone that is currently connected or connecting though one of these connectors will get forcefully disconnected. If, by the time the remote control gets auto-connected, some drone is already connected through a local connector, then auto-connection will try to connect it through the remote control if the latter also knows and sees that drone; otherwise auto-connection lets the remote control decide which drone to connect.