diff --git a/basic_machines/grinder.lua b/basic_machines/grinder.lua
index e41b2fa..97a8340 100644
--- a/basic_machines/grinder.lua
+++ b/basic_machines/grinder.lua
@@ -56,7 +56,10 @@ local function allow_metadata_inventory_put(pos, listname, index, stack, player)
 		return 0
 	end
 	if listname == "src" then
-		CRD(pos).State:start_if_standby(pos)
+		local state = CRD(pos).State
+		if state then
+			state:start_if_standby(pos)
+		end
 	end
 	return stack:get_count()
 end
diff --git a/basis/fly_lib.lua b/basis/fly_lib.lua
index 742407b..be1a137 100644
--- a/basis/fly_lib.lua
+++ b/basis/fly_lib.lua
@@ -318,8 +318,7 @@ local function entity_to_node(pos, obj)
 			local nvm = techage.get_nvm(self.base_pos)
 			nvm.running = nil
 		end
-		minetest.after(0.2, obj.remove, obj)
-
+		minetest.after(0.1, obj.remove, obj)
 		local node =  minetest.get_node(pos)
 		local ndef1 = minetest.registered_nodes[name]
 		local ndef2 = minetest.registered_nodes[node.name]
@@ -358,7 +357,7 @@ local function node_to_entity(start_pos)
 		-- Block with other metadata
 		node = minetest.get_node(start_pos)
 		metadata = meta:to_table()
-		minetest.after(0.2, minetest.remove_node, start_pos)
+		minetest.after(0.1, minetest.remove_node, start_pos)
 	else
 		return
 	end
diff --git a/logic/button.lua b/logic/button.lua
index 651fc37..c04d1f3 100644
--- a/logic/button.lua
+++ b/logic/button.lua
@@ -152,6 +152,9 @@ local function on_rightclick_on(pos, node, clicker)
 	if fixed == "true" then
 		if can_access(pos, clicker) then
 			switch_on(pos)
+			local mem = techage.get_mem(pos)
+			mem.clicker = clicker and clicker:get_player_name()
+			mem.time = math.floor(minetest.get_us_time() / 100000)
 		end
 	end
 end
@@ -334,3 +337,31 @@ minetest.register_craft({
 		{"", "", ""},
 	},
 })
+
+techage.register_node({
+		"techage:ta4_button_off", "techage:ta4_button_on",
+	}, {
+		on_recv_message = function(pos, src, topic, payload)
+			if topic == "name" then
+				local mem = techage.get_mem(pos)
+				return mem.clicker or ""
+			elseif topic == "time" then
+				local mem = techage.get_mem(pos)
+				return mem.time or 0
+			else
+				return "unsupported"
+			end
+		end,
+		on_beduino_request_data = function(pos, src, topic, payload)
+			if topic == 144 then  -- Player Name
+				local mem = techage.get_mem(pos)
+				return 0, mem.clicker
+			elseif topic == 149 then  --time
+				local mem = techage.get_mem(pos)
+				return 0, {mem.time or 0}
+			else
+				return 2, ""
+			end
+		end,
+	}
+)
diff --git a/manuals/ta4_lua_controller_EN.md b/manuals/ta4_lua_controller_EN.md
index 07c1b61..a9c3315 100644
--- a/manuals/ta4_lua_controller_EN.md
+++ b/manuals/ta4_lua_controller_EN.md
@@ -374,7 +374,9 @@ Please note, that this is not a technical distinction, only a logical.
 | "count"      | number of items                                              | Read the total amount of TA4 chest items. An optional  number as `add_data` is used to address only one inventory slot (1..8, from left to right). |
 | "itemstring" | item string of the given slot                                | Specific command for the TA4 8x2000 Chest to read the item type (technical name) of one chest slot, specified via `add_data` (1..8).<br />Example: s = $send_cmnd("223", "itemstring", 1) |
 | "output"     | recipe output string, <br />e.g.: "default:glass"            | Only for the Industrial Furnace. If no recipe is active, the command returns "unknown" |
-| "input"      | `<index>`                                                    | Read a recipe from the TA4 Recipe Block. `<index>` is the number of the recipe. The block return a list of recipe items. |
+| "input"      | \<index>                                                     | Read a recipe from the TA4 Recipe Block. `<index>` is the number of the recipe. The block return a list of recipe items. |
+| "name"       | \<player name>                                               | Player name of the TA3/TA4 Player Detector or TA4 Button     |
+| "time"       | number                                                       | Time in system ticks (norm. 100 ms) when the TA4 Button is clicked |