diff --git a/ble_darwin.go b/ble_darwin.go
index fa499a2..2007292 100644
--- a/ble_darwin.go
+++ b/ble_darwin.go
@@ -18,7 +18,6 @@ type BLE struct {
 	state       ns.CBManagerState
 	events      chan interface{}
 	peripherals Peripherals
-	hr          int
 	cd          *ns.CBDelegate
 	cm          *ns.CBCentralManager
 
@@ -164,6 +163,10 @@ type DiscoverCharacteristicEvent struct {
 	Characteristic *ns.CBCharacteristic
 }
 
+type UpdateValueEvent struct {
+	Data []byte
+}
+
 type ConnectEvent struct {
 	Peripheral Peripheral
 }
@@ -180,12 +183,6 @@ func (b *BLE) Events() chan interface{} {
 	return b.events
 }
 
-func (b *BLE) HR() int {
-	b.Lock()
-	defer b.Unlock()
-	return b.hr
-}
-
 func stringState(x ns.CBManagerState) string {
 	switch x {
 	case (ns.CBManagerState)(ns.CBManagerStateResetting):
@@ -430,14 +427,10 @@ func (p Peripheral) SetNotifyValue(c *ns.CBCharacteristic) {
 }
 
 func updateValue(p *ns.CBPeripheral, chr *ns.CBCharacteristic, e *ns.NSError) {
-	//ble := pdLookup[p]
-	ble := gble
-	if chr.UUID().IsEqualTo(hrv_uuid) {
-		v := chr.Value()
-		ble.Lock()
-		ble.hr = hr(v)
-		ble.Unlock()
-		fmt.Printf("Heart rate: %d\n", ble.hr)
+	b := pdLookup[p.Ptr()]
+	v := chr.Value()
+	b.events <-UpdateValueEvent{
+		Data: C.GoBytes(v.Bytes(), (C.int)(v.Length())),
 	}
 }