Delta / Mbed 2 deprecated NNN40_Websocket

Simple websocket client example

Dependencies:   WIFI_API_32kRAM WebSocketClient mbed

This sample code work with following Websocket Echo Server implementation using Python (tornado package needed). The echo server will wait for a message to be received and then echo back the message reversed. Details about the connection will be printed to the terminal.

import tornado.httpserver
import tornado.websocket
import tornado.ioloop
import tornado.web
import socket
'''
This is a simple Websocket Echo server that uses the Tornado websocket handler.
Please run `pip install tornado` with python of version 2.7.9 or greater to install tornado.
This program will echo back the reverse of whatever it recieves.
Messages are output to the terminal for debuggin purposes. 
''' 
 
class WSHandler(tornado.websocket.WebSocketHandler):
    def open(self):
        print 'new connection'
      
    def on_message(self, message):
        print 'message received:  %s' % message
        # Reverse Message and send it back
        print 'sending back message: %s' % message[::-1]
        self.write_message(message[::-1])
 
    def on_close(self):
        print 'connection closed'
 
    def check_origin(self, origin):
        return True
 
application = tornado.web.Application([
    (r'/ws', WSHandler),
])
 
 
if __name__ == "__main__":
    http_server = tornado.httpserver.HTTPServer(application)
    http_server.listen(8888)
    myIP = socket.gethostbyname(socket.gethostname())
    print '*** Websocket Server Started at %s***' % myIP
    tornado.ioloop.IOLoop.instance().start()

Files at this revision

API Documentation at this revision

Revision 1:610f3dc5679e, committed 2015-10-27

Comitter:
wgd8700
Date:
Tue Oct 27 10:03:33 2015 +0000
Parent:
0:47ec083185d0
Commit message:
Add ws.read function

Changed in this revision

WIFI_API_32kRAM.lib Show annotated file Show diff for this revision Revisions of this file
main.cpp Show annotated file Show diff for this revision Revisions of this file 
--- a/WIFI_API_32kRAM.lib	Wed Oct 07 05:16:10 2015 +0000
+++ b/WIFI_API_32kRAM.lib	Tue Oct 27 10:03:33 2015 +0000
@@ -1,1 +1,1 @@
-http://developer.mbed.org/teams/Delta/code/WIFI_API_32kRAM/#8d8c2064be73
+http://developer.mbed.org/teams/Delta/code/WIFI_API_32kRAM/#d4e992043905

--- a/main.cpp	Wed Oct 07 05:16:10 2015 +0000
+++ b/main.cpp	Tue Oct 27 10:03:33 2015 +0000
@@ -8,7 +8,7 @@
 Serial pc(USBTX, USBRX);
 
 int main() {
-    char recv[30];
+    char recv[50];
  
     pc.baud(115200);
     pc.printf("Init...\n");
@@ -17,17 +17,20 @@
     eth.init(); //Use DHCP
 
     // set given SSID and PW as the highest priority  
-    wifi.setNetwork("Tsungta_iPhone", "icq87001", 0);
+    //wifi.setNetwork("Tsungta_iPhone", "icq87001", 0);
+    wifi.setNetwork("GainSpan_JS", "Delta9999", 0);
     
     eth.connect(40000);
     pc.printf("IP Address:%s\n",eth.getIPAddress());
     pc.printf("MAC Address:%s\n",eth.getMACAddress());
  
-    Websocket ws("ws://172.20.10.11:8888/ws");
+    Websocket ws("ws://192.168.15.105:8888/ws");
     ws.connect();
  
     while (1) {
         ws.send("WebSocket Hello World over Ethernet");
-        wait(1.0);
+        ws.read(recv);
+        pc.printf("read: %s\n", recv);
+        wait(1.0);        
     }
 }
\ No newline at end of file