Add cancellation to watchable values

internal/types/types.go

@@ -9,11 +9,15 @@ const (
 	ReqTypeNotify
 	ReqTypeSetTime
 	ReqTypeWatchHeartRate
+	ReqTypeCancelHeartRate
 	ReqTypeWatchBattLevel
+	ReqTypeCancelBattLevel
 	ReqTypeMotion
 	ReqTypeWatchMotion
+	ReqTypeCancelMotion
 	ReqTypeStepCount
 	ReqTypeWatchStepCount
+	ReqTypeCancelStepCount
 )
 
 const (
@@ -25,11 +29,15 @@ const (
 	ResTypeNotify
 	ResTypeSetTime
 	ResTypeWatchHeartRate
+	ResTypeCancelHeartRate
 	ResTypeWatchBattLevel
+	ResTypeCancelBattLevel
 	ResTypeMotion
 	ResTypeWatchMotion
+	ResTypeCancelMotion
 	ResTypeStepCount
 	ResTypeWatchStepCount
+	ResTypeCancelStepCount
 )
 
 const (
@@ -43,7 +51,7 @@ type ReqDataFwUpgrade struct {
 }
 
 type Response struct {
-	Type    int
+	Type    int         `json:"type"`
 	Value   interface{} `json:"value,omitempty"`
 	Message string      `json:"msg,omitempty"`
 	Error   bool        `json:"error"`