update README.md

README.md

@@ -21,10 +21,16 @@ a WebSocket Server and Client for Arduino based on RFC6455.
 
 ##### Supported Hardware #####
  - ESP8266 [Arduino for ESP8266](https://github.com/Links2004/Arduino)
- - ATmega328 with Ethernet Shield (alpha)
- - ATmega328 with enc28j60 (alpha)
- - ATmega2560 with Ethernet Shield (alpha)
- - ATmega2560 with enc28j60 (alpha)
+ - ATmega328 with Ethernet Shield (ATmega branch) 
+ - ATmega328 with enc28j60 (ATmega branch) 
+ - ATmega2560 with Ethernet Shield (ATmega branch) 
+ - ATmega2560 with enc28j60 (ATmega branch) 
+ 
+###### Note: ######
+
+  version 2.0 is not compatible with AVR/ATmega, check ATmega branch.
+  
+  Arduino for AVR not supports std namespace of c++.
  
 ### wss / SSL ###
  supported for:
@@ -32,10 +38,13 @@ a WebSocket Server and Client for Arduino based on RFC6455.
  
 ### ESP Async TCP ###
 
-this libary can run in Async TCP mode on the ESP8266.
-the mode can be aktivated in the ```WebSockets.h``` (see WEBSOCKETS_NETWORK_TYPE define).
-the ```ESPAsyncTCP``` libary is required.
-Note: in this mode wss / SSL is not posible.
+This libary can run in Async TCP mode on the ESP.
+
+The mode can be aktivated in the ```WebSockets.h``` (see WEBSOCKETS_NETWORK_TYPE define).
+
+```ESPAsyncTCP``` libary is required.
+
+Note: in this mode wss / SSL is not possible.
 
 ### Issues ###
 Submit issues to: https://github.com/Links2004/arduinoWebSockets/issues