From bda6ecf0179bbe1ad7b46c5f002c76f9c14074f0 Mon Sep 17 00:00:00 2001
From: Jan Chrillesen <chrille@gmail.com>
Date: Sat, 13 Feb 2016 09:28:47 +0100
Subject: [PATCH] Add yield() in sendACK

Needed on ESP8266 to avoid WDT kicking in - see http://forum.mysensors.org/topic/2278/esp8266-gateway-and-sensor-node-not-talking-noobie/34
---
 libraries/MySensors/drivers/RFM69/RFM69.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/libraries/MySensors/drivers/RFM69/RFM69.cpp b/libraries/MySensors/drivers/RFM69/RFM69.cpp
index 777b428..9ed47bb 100644
--- a/libraries/MySensors/drivers/RFM69/RFM69.cpp
+++ b/libraries/MySensors/drivers/RFM69/RFM69.cpp
@@ -251,7 +251,10 @@ bool RFM69::ACKRequested() {
 /// Should be called immediately after reception in case sender wants ACK
 void RFM69::sendACK(const void* buffer, byte bufferSize) {
   byte sender = SENDERID;
-  while (!canSend()) receiveDone();
+  while (!canSend()) {
+    receiveDone();
+    yield();
+  }
   sendFrame(sender, buffer, bufferSize, false, true);
 }