From 7ddcdc2bd31cbe963e42419344ea18c2952ae76e Mon Sep 17 00:00:00 2001
From: Links <help.markus+gitk@gmail.com>
Date: Sat, 12 May 2018 12:40:56 +0200
Subject: [PATCH] add info for AVR usage with version 2.x.x

---
 src/WebSockets.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/WebSockets.h b/src/WebSockets.h
index 989d9b9..4063b5f 100644
--- a/src/WebSockets.h
+++ b/src/WebSockets.h
@@ -33,7 +33,13 @@
 #include <IPAddress.h>
 #endif
 
+#ifdef ARDUINO_ARCH_AVR
+#error Version 2.x.x currently does not support Arduino with AVR since there is no support for std namespace of c++.
+#error Use Version 1.x.x. (ATmega branch)
+#else
 #include <functional>
+#endif
+
 
 #ifndef NODEBUG_WEBSOCKETS
 #ifdef DEBUG_ESP_PORT