lua manual adapted, bugfix in core function

basis/command.lua

@@ -219,7 +219,7 @@ end
 function techage.remove_node(pos, oldnode, oldmetadata)
 	local number = oldmetadata and oldmetadata.fields and oldmetadata.fields.node_number
 	number = number or get_number(pos)
-	if number then
+	if number and tonumber(number) then
 		local key = minetest.hash_node_position(pos)
 		NumbersToBeRecycled[key] = number
 		local ninfo = NodeInfoCache[number] or update_nodeinfo(number)

manuals/ta4_lua_controller_EN.md

@@ -351,7 +351,7 @@ In addition to Lua standard function the Lua Controller provides the following f
   The result is block dependent (see table below):
 
 | ident        | returned data                                                | comment                                                      |
-| ----------- | ------------------------------------------------------------ | ------------------------------------------------------------ |
+| ------------ | ------------------------------------------------------------ | ------------------------------------------------------------ |
 | "state"      | one of: "running", "stopped", "blocked", "standby", "fault", or "unloaded" | Techage machine state, used by many machines                 |
 | "state"      | one of: "red", "amber", "green", "off"                       | Signal Tower state                                           |
 | "state"      | one of: "empty", "loaded", "full"                            | State of a chest or Sensor Chest                             |
@@ -363,6 +363,7 @@ In addition to Lua standard function the Lua Controller provides the following f
 | "stacks"     | Array with up to 4 Stores with the inventory content (see example) | only for Sensor Chests                                       |
 | "count"      | number                                                       | Read the item counter of the TA4 Item Detector block         |
 | "count"      | number of items                                              | Read the total amount of TA4 chest items. An optional  number as `add_data` is used to address only on 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 = $read_data("223", "itemstring", 1) |
 
 
 
@@ -410,10 +411,16 @@ Messages are used to transport data between Controllers. Messages are text strin
 
 
 * `$chat(text)` - Send yourself a chat message. _text_ is a text string.
+
 * `$door(pos, text)` - Open/Close a door at position "pos".    
   Example: `$door("123,7,-1200", "close")`.    
   Hint: Use the Techage Info Tool to determine the door position.
   
+* `$item_description("default:apple")`
+  Get the description (item name) for a specified itemstring, e. g. determined via the TA4 8x2000 Chest command `itemstring`:
+  `str = $read_data("223", "itemstring", 1)`
+  `descr = $item_description(str)`
+
   
 
 ## Example Scripts