A go library for interfacing with InfiniTime firmware over BLE on Linux.
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package infinitime
import "github.com/muka/go-bluetooth/bluez/profile/gatt"
type MusicEvent uint8
const (
MusicEventChar = "00000001-78fc-48fe-8e23-433b3a1942d0"
MusicStatusChar = "00000002-78fc-48fe-8e23-433b3a1942d0"
MusicArtistChar = "00000003-78fc-48fe-8e23-433b3a1942d0"
MusicTrackChar = "00000004-78fc-48fe-8e23-433b3a1942d0"
MusicAlbumChar = "00000005-78fc-48fe-8e23-433b3a1942d0"
)
const (
MusicEventOpen MusicEvent = 0xe0
MusicEventPlay MusicEvent = 0x00
MusicEventPause MusicEvent = 0x01
MusicEventNext MusicEvent = 0x03
MusicEventPrev MusicEvent = 0x04
MusicEventVolUp MusicEvent = 0x05
MusicEventVolDown MusicEvent = 0x06
)
// MusicCtrl stores everything required to control music
type MusicCtrl struct {
eventChar *gatt.GattCharacteristic1
statusChar *gatt.GattCharacteristic1
artistChar *gatt.GattCharacteristic1
trackChar *gatt.GattCharacteristic1
albumChar *gatt.GattCharacteristic1
}
// SetStatus sets the playing status
func (mc MusicCtrl) SetStatus(playing bool) error {
if playing {
return mc.statusChar.WriteValue([]byte{0x1}, nil)
}
return mc.statusChar.WriteValue([]byte{0x0}, nil)
}
// SetArtist sets the artist on InfniTime
func (mc MusicCtrl) SetArtist(artist string) error {
return mc.artistChar.WriteValue([]byte(artist), nil)
}
// SetTrack sets the track name on InfniTime
func (mc MusicCtrl) SetTrack(track string) error {
return mc.trackChar.WriteValue([]byte(track), nil)
}
// SetAlbum sets the album on InfniTime
func (mc MusicCtrl) SetAlbum(album string) error {
return mc.albumChar.WriteValue([]byte(album), nil)
}
// WatchEvents watches music events from InfiniTime
func (mc MusicCtrl) WatchEvents() (<-chan MusicEvent, error) {
// Start notifications on music event characteristic
err := mc.eventChar.StartNotify()
if err != nil {
return nil, err
}
// Watch music event properties
ch, err := mc.eventChar.WatchProperties()
if err != nil {
return nil, err
}
musicEventCh := make(chan MusicEvent, 5)
go func() {
// For every event
for event := range ch {
// If value changes
if event.Name == "Value" {
log.Debug().Bytes("value", event.Value.([]byte)).Msg("Received music event from watch")
// Send music event to channel
musicEventCh <- MusicEvent(event.Value.([]byte)[0])
}
}
}()
return musicEventCh, nil
}