From 592d0c60e98c86ebd0cfa2db728c44999a40186b Mon Sep 17 00:00:00 2001
From: Terry Moore <tmm@mcci.com>
Date: Mon, 26 Nov 2018 03:50:54 -0500
Subject: [PATCH] Fix #50: handle zero-length payloads per spec

---
 src/lib/arduino_lorawan_begin.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lib/arduino_lorawan_begin.cpp b/src/lib/arduino_lorawan_begin.cpp
index 3d04d9b..cde6a85 100644
--- a/src/lib/arduino_lorawan_begin.cpp
+++ b/src/lib/arduino_lorawan_begin.cpp
@@ -268,7 +268,7 @@ void Arduino_LoRaWAN::StandardEventProcessor(
 void Arduino_LoRaWAN::NetRxComplete(void)
 	{
 	// notify client that RX is available
-	if (LMIC.dataLen)
+	if (LMIC.dataLen  != 0 || LMIC.dataBeg != 0)
 		{
 		uint8_t port;
 		port = 0;