diff --git a/README.md b/README.md
index 5364d34..b4fc0b9 100644
--- a/README.md
+++ b/README.md
@@ -61,6 +61,26 @@ stehen alle verbundenen Peripherien, Methoden, Frogport-Adressen sowie abrufbare
 Paket-, Inventar- und Stock-Ticker-Daten. Das Programm versendet keine Pakete und
 veraendert keine Redstone-Ausgaenge.
 
+## Greenhouse-Inventar erfassen
+
+`greenhouse_inventory_debug.lua` erkennt einen per Wired Modem verbundenen
+Drawer-/Storage-Controller und schreibt dessen Inhalt rein lesend nach
+`greenhouse_inventory_debug.txt`. Essenzen, Seeds und die vollstaendige
+Itemliste werden mit Registry-ID, Menge und Slot ausgegeben.
+
+```lua
+delete greenhouse_inventory_debug.lua
+wget https://git.peli-server.de/Dystroyer8/ATM10_CC_Codes/raw/branch/main/greenhouse_inventory_debug.lua greenhouse_inventory_debug.lua
+greenhouse_inventory_debug
+```
+
+Falls mehrere Controller verbunden sind, kann der im Dump angezeigte
+Peripheral-Name gezielt uebergeben werden:
+
+```lua
+greenhouse_inventory_debug <peripheral_name>
+```
+
 ### Erster Logistik-Funktionstest
 
 Nach erfolgreicher Erkennung kann der Monitor-Testcontroller installiert werden:
diff --git a/greenhouse_inventory_debug.lua b/greenhouse_inventory_debug.lua
new file mode 100644
index 0000000..455db90
--- /dev/null
+++ b/greenhouse_inventory_debug.lua
@@ -0,0 +1,184 @@
+-- ATM10 Greenhouse inventory diagnostic
+-- Read-only: detects a connected drawer/storage controller and writes its contents.
+
+local OUTPUT_FILE = "greenhouse_inventory_debug.txt"
+local requestedName = ({ ... })[1]
+
+local function containsMethod(methods, wanted)
+    for _, method in ipairs(methods or {}) do
+        if method == wanted then return true end
+    end
+    return false
+end
+
+local function allTypes(name)
+    local types = { peripheral.getType(name) }
+    local result = {}
+    for _, value in ipairs(types) do
+        if type(value) == "string" then result[#result + 1] = value end
+    end
+    return result
+end
+
+local function joinedTypes(name)
+    return table.concat(allTypes(name), ", ")
+end
+
+local function isInventory(name)
+    if peripheral.hasType and peripheral.hasType(name, "inventory") then return true end
+    local methods = peripheral.getMethods(name) or {}
+    return containsMethod(methods, "list") and containsMethod(methods, "size")
+end
+
+local function safeCall(name, method, ...)
+    local result = table.pack(pcall(peripheral.call, name, method, ...))
+    if not result[1] then return false, tostring(result[2]) end
+    return true, table.unpack(result, 2, result.n)
+end
+
+local function itemCount(contents)
+    local total, occupied = 0, 0
+    for _, item in pairs(contents or {}) do
+        if type(item) == "table" and item.name then
+            total = total + (tonumber(item.count) or 0)
+            occupied = occupied + 1
+        end
+    end
+    return total, occupied
+end
+
+local function scoreCandidate(candidate)
+    local text = (candidate.name .. " " .. candidate.types):lower()
+    local score = candidate.occupied
+    if text:find("functionalstorage", 1, true) then score = score + 10000 end
+    if text:find("storage_controller", 1, true) then score = score + 5000 end
+    if text:find("controller", 1, true) then score = score + 2000 end
+    if text:find("drawer", 1, true) then score = score + 1000 end
+    return score
+end
+
+local candidates = {}
+for _, name in ipairs(peripheral.getNames()) do
+    if isInventory(name) then
+        local okList, contents = safeCall(name, "list")
+        if okList and type(contents) == "table" then
+            local total, occupied = itemCount(contents)
+            local okSize, size = safeCall(name, "size")
+            candidates[#candidates + 1] = {
+                name = name,
+                types = joinedTypes(name),
+                contents = contents,
+                total = total,
+                occupied = occupied,
+                size = okSize and tonumber(size) or 0,
+            }
+        end
+    end
+end
+
+table.sort(candidates, function(left, right)
+    local leftScore, rightScore = scoreCandidate(left), scoreCandidate(right)
+    if leftScore == rightScore then return left.name < right.name end
+    return leftScore > rightScore
+end)
+
+local selected
+if requestedName then
+    for _, candidate in ipairs(candidates) do
+        if candidate.name == requestedName then selected = candidate break end
+    end
+    if not selected then error("Inventar-Peripheral nicht gefunden: " .. requestedName, 0) end
+else
+    selected = candidates[1]
+end
+
+if not selected then
+    error("Kein verbundenes Inventar gefunden. Wired Modem am Drawer Controller pruefen.", 0)
+end
+
+local aggregate = {}
+for slot, item in pairs(selected.contents) do
+    if type(item) == "table" and item.name then
+        local entry = aggregate[item.name]
+        if not entry then
+            entry = { name = item.name, displayName = item.displayName, count = 0, slots = {} }
+            aggregate[item.name] = entry
+        end
+        entry.count = entry.count + (tonumber(item.count) or 0)
+        entry.slots[#entry.slots + 1] = tonumber(slot) or slot
+    end
+end
+
+local items = {}
+for _, item in pairs(aggregate) do items[#items + 1] = item end
+table.sort(items, function(left, right) return left.name < right.name end)
+
+local function isEssence(item)
+    return item.name:find("_essence", 1, true) ~= nil
+end
+
+local function isSeed(item)
+    return item.name:find("_seeds", 1, true) ~= nil or item.name:find("_seed", 1, true) ~= nil
+end
+
+local file = fs.open(OUTPUT_FILE, "w")
+if not file then error("Kann " .. OUTPUT_FILE .. " nicht schreiben", 0) end
+
+local function line(text)
+    file.writeLine(tostring(text or ""))
+end
+
+line("ATM10 GREENHOUSE INVENTORY DEBUG")
+line("Computer ID: " .. os.getComputerID())
+line("Selected peripheral: " .. selected.name)
+line("Types: " .. selected.types)
+line("Slots reported: " .. tostring(selected.size))
+line("Occupied entries: " .. selected.occupied)
+line("Total items: " .. selected.total)
+line("")
+line("INVENTORY CANDIDATES")
+for index, candidate in ipairs(candidates) do
+    line(string.format("%d. %s | %s | slots=%d occupied=%d items=%d%s",
+        index, candidate.name, candidate.types, candidate.size, candidate.occupied,
+        candidate.total, candidate == selected and " | SELECTED" or ""))
+end
+
+line("")
+line("ESSENCES")
+local essenceCount = 0
+for _, item in ipairs(items) do
+    if isEssence(item) then
+        essenceCount = essenceCount + 1
+        line(string.format("%s | count=%d | slots=%s",
+            item.name, item.count, table.concat(item.slots, ",")))
+    end
+end
+line("Essence types: " .. essenceCount)
+
+line("")
+line("SEEDS")
+local seedCount = 0
+for _, item in ipairs(items) do
+    if isSeed(item) then
+        seedCount = seedCount + 1
+        line(string.format("%s | count=%d | slots=%s",
+            item.name, item.count, table.concat(item.slots, ",")))
+    end
+end
+line("Seed types: " .. seedCount)
+
+line("")
+line("ALL ITEMS")
+for _, item in ipairs(items) do
+    line(string.format("%s | count=%d | slots=%s",
+        item.name, item.count, table.concat(item.slots, ",")))
+end
+line("Unique item types: " .. #items)
+file.close()
+
+print("Greenhouse-Dump erstellt:")
+print(OUTPUT_FILE)
+print("Controller: " .. selected.name)
+print("Items: " .. #items .. " | Essenzen: " .. essenceCount .. " | Seeds: " .. seedCount)
+print("Falls der falsche Controller gewaehlt wurde:")
+print("greenhouse_inventory_debug <peripheral_name>")