Bluetooth Power Control API
src/btstack_control.h : The Bluetooth Hardware Control API allows HCI to manage Bluetooth chipsets via direct hardware controls.
typedef struct {
void (*init) (const void *config);
int (*on) (void); // <-- turn BT module on and configure
int (*off) (void); // <-- turn BT module off
int (*sleep)(void); // <-- put BT module to sleep - only to be called after ON
int (*wake) (void); // <-- wake BT module from sleep - only to be called after SLEEP
void (*register_for_power_notifications)(void (*cb)(POWER_NOTIFICATION_t event));
} btstack_control_t;