diff --git a/inventoryClient.lua b/inventoryClient.lua
index d954991..fb7fc8c 100644
--- a/inventoryClient.lua
+++ b/inventoryClient.lua
@@ -105,10 +105,14 @@ end
 -------------------------------------------------
 
 local function sendToMaster(message)
-    if not networkModem then return end
+    if not networkModem then
+        log.warn("NET", "sendToMaster: no modem, dropping %s", tostring(message.type))
+        return
+    end
     if not message.commandId then
         message.commandId = newCommandId()
     end
+    log.info("NET", "TX -> ch %d: type=%s cmdId=%s", ORDER_CHANNEL, tostring(message.type), tostring(message.commandId))
     networkModem.transmit(ORDER_CHANNEL, CLIENT_CHANNEL, message)
 end
 
diff --git a/inventoryManager.lua b/inventoryManager.lua
index 2a0bd52..e33cd80 100644
--- a/inventoryManager.lua
+++ b/inventoryManager.lua
@@ -541,14 +541,23 @@ local function main()
         -- Task 13: Network order/command listener
         function()
             if not ctx.networkModem then
+                log.warn("NET", "No modem — listener disabled")
                 while true do sleep(3600) end
             end
+            log.info("NET", "Listener started on channel %d (modem: %s)", cfg.ORDER_CHANNEL, ctx.networkModemName or "?")
+            local cmdCount = 0
             while true do
+                log.info("NET", "Waiting for modem_message... (handled %d so far)", cmdCount)
                 local event, side, channel, replyChannel, message, distance = os.pullEvent("modem_message")
+                log.info("NET", "Got modem_message: side=%s ch=%d reply=%d type=%s",
+                    tostring(side), channel or -1, replyChannel or -1,
+                    type(message) == "table" and tostring(message.type) or type(message))
                 if channel == cfg.ORDER_CHANNEL and type(message) == "table" then
                     if isCommandDuplicate(message.commandId) then
                         log.debug("NET", "Duplicate command skipped: %s", tostring(message.commandId))
                     else
+                        cmdCount = cmdCount + 1
+                        log.info("NET", "Command #%d accepted: type=%s cmdId=%s", cmdCount, tostring(message.type), tostring(message.commandId))
                         recordCommandId(message.commandId)
                         cleanupCommandIds()
                         local handlerOk, handlerErr = pcall(function()
@@ -794,8 +803,12 @@ local function main()
                         end) -- pcall handler
                         if not handlerOk then
                             log.error("NET", "Handler error: %s", tostring(handlerErr))
+                        else
+                            log.info("NET", "Command #%d handled OK", cmdCount)
                         end
                     end -- idempotency else
+                else
+                    log.info("NET", "Ignored: ch=%d (want %d) or not table", channel or -1, cfg.ORDER_CHANNEL)
                 end
             end
         end