diff --git a/src/RSIPI/rsi_client.py b/src/RSIPI/rsi_client.py
index 85bd379..7ec9254 100644
--- a/src/RSIPI/rsi_client.py
+++ b/src/RSIPI/rsi_client.py
@@ -62,6 +62,26 @@ class RSIClient:
         logging.info("✅ RSI Client Stopped")
         print("✅ RSI Client Stopped")
 
+    def update_send_variable(self, name, value):
+        print(f"[DEBUG] update_send_variable called with: {name} = {value}")
+        if "." in name:
+            parent, child = name.split(".", 1)
+            if parent in self.send_variables and isinstance(self.send_variables[parent], dict):
+                self.send_variables[parent][child] = value
+                print(f"[DEBUG] Current send_variables: {dict(self.send_variables)}")
+                return f"✅ Updated {name} to {value}"
+            else:
+                return f"❌ Variable '{name}' not found or not structured correctly"
+        else:
+            if name in self.send_variables:
+                self.send_variables[name] = value
+                return f"✅ Updated {name} to {value}"
+                print(f"[DEBUG] EStr value after update: {self.send_variables.get('EStr')}")
+                print(f"[DEBUG] Current send_variables: {dict(self.send_variables)}")
+            else:
+                return f"❌ Variable '{name}' not found in send_variables"
+
+
 if __name__ == "__main__":
     config_file = "RSI_EthernetConfig.xml"
     client = RSIClient(config_file)