Implement Motion Service
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parent
d3f48d6339
commit
4fa0ce1801
136
infinitime.go
136
infinitime.go
@ -17,6 +17,8 @@ const BTName = "InfiniTime"
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const (
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NewAlertChar = "00002a46-0000-1000-8000-00805f9b34fb"
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NotifEventChar = "00020001-78fc-48fe-8e23-433b3a1942d0"
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StepCountChar = "00030001-78fc-48fe-8e23-433b3a1942d0"
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MotionValChar = "00030002-78fc-48fe-8e23-433b3a1942d0"
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FirmwareVerChar = "00002a26-0000-1000-8000-00805f9b34fb"
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CurrentTimeChar = "00002a2b-0000-1000-8000-00805f9b34fb"
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BatteryLvlChar = "00002a19-0000-1000-8000-00805f9b34fb"
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@ -28,6 +30,8 @@ type Device struct {
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device *device.Device1
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newAlertChar *gatt.GattCharacteristic1
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notifEventChar *gatt.GattCharacteristic1
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stepCountChar *gatt.GattCharacteristic1
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motionValChar *gatt.GattCharacteristic1
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fwVersionChar *gatt.GattCharacteristic1
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currentTimeChar *gatt.GattCharacteristic1
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battLevelChar *gatt.GattCharacteristic1
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@ -277,6 +281,10 @@ func (i *Device) resolveChars() error {
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i.newAlertChar = char
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case NotifEventChar:
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i.notifEventChar = char
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case StepCountChar:
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i.stepCountChar = char
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case MotionValChar:
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i.motionValChar = char
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case FirmwareVerChar:
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i.fwVersionChar = char
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case CurrentTimeChar:
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@ -330,6 +338,40 @@ func (i *Device) BatteryLevel() (uint8, error) {
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return uint8(battLevel[0]), nil
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}
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func (i *Device) StepCount() (uint32, error) {
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if !i.device.Properties.Connected {
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return 0, nil
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}
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stepCountData, err := i.stepCountChar.ReadValue(nil)
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if err != nil {
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return 0, err
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}
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return binary.LittleEndian.Uint32(stepCountData), nil
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}
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type MotionValues struct {
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X int16
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Y int16
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Z int16
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}
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func (i *Device) Motion() (MotionValues, error) {
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out := MotionValues{}
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if !i.device.Properties.Connected {
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return out, nil
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}
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motionVals, err := i.motionValChar.ReadValue(nil)
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if err != nil {
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return out, nil
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}
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motionValReader := bytes.NewReader(motionVals)
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err = binary.Read(motionValReader, binary.LittleEndian, &out)
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if err != nil {
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return out, err
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}
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return out, nil
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}
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func (i *Device) HeartRate() (uint8, error) {
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if !i.device.Properties.Connected {
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return 0, nil
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@ -407,6 +449,100 @@ func (i *Device) WatchBatteryLevel() (<-chan uint8, error) {
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return out, nil
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}
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func (i *Device) WatchStepCount() (<-chan uint32, func(), error) {
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if !i.device.Properties.Connected {
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return make(<-chan uint32), nil, nil
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}
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// Start notifications on step count characteristic
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err := i.stepCountChar.StartNotify()
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if err != nil {
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return nil, nil, err
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}
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// Watch properties of step count characteristic
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ch, err := i.stepCountChar.WatchProperties()
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if err != nil {
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return nil, nil, err
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}
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out := make(chan uint32, 2)
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currentStepCount, err := i.StepCount()
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if err != nil {
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return nil, nil, err
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}
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out <- currentStepCount
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cancel, done := cancelFunc()
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go func() {
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// For every event
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for event := range ch {
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select {
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case <-done:
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close(out)
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close(done)
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i.stepCountChar.StopNotify()
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return
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default:
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// If value changed
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if event.Name == "Value" {
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// Send step count to channel
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out <- binary.LittleEndian.Uint32(event.Value.([]byte))
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}
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}
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}
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}()
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return out, cancel, nil
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}
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func (i *Device) WatchMotion() (<-chan MotionValues, func(), error) {
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if !i.device.Properties.Connected {
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return make(<-chan MotionValues), nil, nil
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}
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// Start notifications on motion characteristic
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err := i.motionValChar.StartNotify()
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if err != nil {
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return nil, nil, err
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}
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// Watch properties of motion characteristic
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ch, err := i.motionValChar.WatchProperties()
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if err != nil {
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return nil, nil, err
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}
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out := make(chan MotionValues, 2)
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motionVals, err := i.Motion()
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if err != nil {
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return nil, nil, err
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}
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out <- motionVals
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cancel, done := cancelFunc()
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go func() {
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// For every event
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for event := range ch {
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select {
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case <-done:
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close(out)
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close(done)
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i.motionValChar.StopNotify()
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return
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default:
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// If value changed
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if event.Name == "Value" {
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// Read binary into MotionValues struct
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binary.Read(bytes.NewReader(event.Value.([]byte)), binary.LittleEndian, &motionVals)
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// Send step count to channel
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out <- motionVals
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}
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}
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}
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}()
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return out, cancel, nil
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}
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func cancelFunc() (func(), chan struct{}) {
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done := make(chan struct{}, 1)
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return func() {
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done <- struct{}{}
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}, done
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}
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// SetTime sets the watch's time using the Current Time Service
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func (i *Device) SetTime(t time.Time) error {
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if !i.device.Properties.Connected {
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