Transaction id overrun.

pymodbus-dev · Apr 23, 2024 · 39cc9ff · 39cc9ff
1 parent a48aeeb
commit 39cc9ff
Showing 1 changed file with 5 additions and 2 deletions.
diff --git a/pymodbus/transaction.py b/pymodbus/transaction.py
@@ -451,7 +451,7 @@ def getTransaction(self, tid):
 
         """
         Log.debug("Getting transaction {}", tid)
-        if tid is None:
+        if not tid:
             if self.transactions:
                 return self.transactions.popitem()[1]
             return None
@@ -473,7 +473,10 @@ def getNextTID(self):
 
         :returns: The next unique transaction identifier
         """
-        self.tid = (self.tid + 1) & 0xFFFF
+        if self.tid < 65000:
+            self.tid += 1
+        else:
+            self.tid = 1
         return self.tid
 
     def reset(self):