diff --git a/addons/nezvers_library/autoload/Database.gd b/addons/nezvers_library/autoload/Database.gd
new file mode 100644
index 00000000..e69de29b
diff --git a/addons/nezvers_library/nodes/AreaTransmitter/TransmissionResource.gd b/addons/nezvers_library/nodes/AreaTransmitter/TransmissionResource.gd
index 9db1b87e..f39f6a35 100644
--- a/addons/nezvers_library/nodes/AreaTransmitter/TransmissionResource.gd
+++ b/addons/nezvers_library/nodes/AreaTransmitter/TransmissionResource.gd
@@ -1,5 +1,24 @@
 class_name TransmissionResource
 extends ValueResource
 
-## Used to know when data is consumed and need a reaction to it
-signal consumed
+enum ErrorType {NONE = -1, CONSUMED = 0, TRY_AGAIN, FAILED}
+
+@export var transmission_name:StringName
+@export var state:ErrorType = ErrorType.NONE
+
+func send_transmission(receiver:AreaReceiver2D)->ErrorType:
+	## Receiving end must call either one 
+	receiver.emit_signal(transmission_name, self)
+	
+	# TODO: if signal exists use this assert
+	#assert(state != ErrorType.NONE)
+	return state
+
+func consume()->void:
+	state = ErrorType.CONSUMED
+
+func try_again()->void:
+	state = ErrorType.TRY_AGAIN
+
+func failed()->void:
+	state = ErrorType.FAILED
diff --git a/addons/nezvers_library/nodes/Navigation/TileNavigationGetter.gd b/addons/nezvers_library/nodes/Navigation/TileNavigationGetter.gd
index 70173ba4..27e4bfd4 100644
--- a/addons/nezvers_library/nodes/Navigation/TileNavigationGetter.gd
+++ b/addons/nezvers_library/nodes/Navigation/TileNavigationGetter.gd
@@ -30,7 +30,6 @@ func get_target_path(from:Vector2, to:Vector2)->PackedVector2Array:
 		index = 1
 	else:
 		index = 0
-	assert(index < navigation_path.size())
 	
 	finish_reached = false
 	if visible:
diff --git a/addons/top_down/scenes/pickups/health_pickup.tscn b/addons/top_down/scenes/pickups/health_pickup.tscn
index 7cc566bd..0dfbeccd 100644
--- a/addons/top_down/scenes/pickups/health_pickup.tscn
+++ b/addons/top_down/scenes/pickups/health_pickup.tscn
@@ -12,7 +12,8 @@
 [sub_resource type="Resource" id="Resource_1v8hw"]
 script = ExtResource("3_7bghr")
 value = 1.0
-effect_signal = &"health"
+transmission_name = &""
+state = -1
 version = 0
 not_saved = false
 
diff --git a/addons/top_down/scripts/pickups/EffectTransmision.gd b/addons/top_down/scripts/pickups/EffectTransmision.gd
index d66f4c6f..e69de29b 100644
--- a/addons/top_down/scripts/pickups/EffectTransmision.gd
+++ b/addons/top_down/scripts/pickups/EffectTransmision.gd
@@ -1,5 +0,0 @@
-class_name EffectTransmision
-extends TransmissionResource
-
-
-@export var effect_signal:StringName
diff --git a/addons/top_down/scripts/pickups/EffectTransmitter.gd b/addons/top_down/scripts/pickups/EffectTransmitter.gd
index e2f9a9c0..e5747ad0 100644
--- a/addons/top_down/scripts/pickups/EffectTransmitter.gd
+++ b/addons/top_down/scripts/pickups/EffectTransmitter.gd
@@ -6,7 +6,7 @@ signal consumed
 # TODO: maybe add enabled to manage connections
 
 @export var area_transmitter:AreaTransmitter2D
-@export var effect_transmission:EffectTransmision
+@export var effect_transmission:TransmissionResource
 
 func _ready()->void:
 	assert(effect_transmission != null)
@@ -15,9 +15,31 @@ func _ready()->void:
 func on_area_entered(area:Area2D)->void:
 	if !(area is AreaReceiver2D):
 		return
-	var effect_dup:EffectTransmision = effect_transmission.duplicate()
-	effect_dup.consumed.connect(on_consumed, CONNECT_ONE_SHOT)
-	(area as AreaReceiver2D).emit_signal(effect_dup.effect_signal, effect_dup)
+	send(area)
 
+func send(receiver:AreaReceiver2D)->void:
+	var effect_dup:TransmissionResource = effect_transmission.duplicate()
+	var err:TransmissionResource.ErrorType = effect_dup.send_transmission(receiver)
+	
+	# TODO: maybe situations when need to handle FAILED and NONE
+	if err == TransmissionResource.ErrorType.CONSUMED:
+		on_consumed()
+		return
+	if err == TransmissionResource.ErrorType.TRY_AGAIN:
+		# If this is called from next frame the calling signal connection is stil active.
+		# Need to delay somewhere after this function call.
+		try_again.call_deferred(receiver)
+		return
+
+## Call transmission next physics frame
+func try_again(receiver:AreaReceiver2D)->void:
+	get_tree().physics_frame.connect(test_receiver.bind(receiver), CONNECT_ONE_SHOT)
+
+func test_receiver(receiver:AreaReceiver2D)->void:
+	var overlapping_areas:Array[Area2D] = area_transmitter.get_overlapping_areas()
+	if overlapping_areas.has(receiver):
+		send(receiver)
+
+## Give notification to other nodes
 func on_consumed()->void:
 	consumed.emit()
diff --git a/addons/top_down/scripts/pickups/HealthReceiver.gd b/addons/top_down/scripts/pickups/HealthReceiver.gd
index 853b7ee5..400ec4e7 100644
--- a/addons/top_down/scripts/pickups/HealthReceiver.gd
+++ b/addons/top_down/scripts/pickups/HealthReceiver.gd
@@ -1,6 +1,8 @@
 class_name HealthReceiver
 extends Node
 
+@export var enabled:bool = true
+
 @export var area_receiver:AreaReceiver2D
 @export var damage_receiver:DamageReceiver
 ## Resource node holds HealthResource
@@ -20,5 +22,8 @@ func _ready()->void:
 	area_receiver.connect("health", receive)
 
 func receive(health_transmision:HealthTransmision)->void:
+	if !enabled:
+		health_transmision.failed()
+		return
 	## Health transmission takes care of processing health
 	health_transmision.apply(health_resource)
diff --git a/addons/top_down/scripts/pickups/HealthTransmision.gd b/addons/top_down/scripts/pickups/HealthTransmision.gd
index d6d95bee..ee7a6a03 100644
--- a/addons/top_down/scripts/pickups/HealthTransmision.gd
+++ b/addons/top_down/scripts/pickups/HealthTransmision.gd
@@ -1,5 +1,5 @@
 class_name HealthTransmision
-extends EffectTransmision
+extends TransmissionResource
 
 @export var value:float
 
@@ -12,4 +12,4 @@ func apply(health_resource:HealthResource)->void:
 		return
 	health_resource.add_hp(value)
 	
-	consumed.emit()
+	consume()