diff --git a/examples/ble_dual_node_echo.py b/examples/ble_dual_node_echo.py
index 89a2d0d..d992a61 100755
--- a/examples/ble_dual_node_echo.py
+++ b/examples/ble_dual_node_echo.py
@@ -244,7 +244,7 @@ def link_key(link):
 
 
 def send_link_packet(link, text):
-    payload = text.encode("utf-8")
+    payload = f"{text} send_epoch={time.time():.6f}".encode("utf-8")
     RNS.Packet(link, payload, create_receipt=False).send()