Diff: main.cpp

Revision:

4:11b81280c65b

Parent:

3:9bd3e863e15b

Child:

5:ffe1a4c4881e

--- a/main.cpp	Sun Apr 02 10:16:20 2017 +0000
+++ b/main.cpp	Mon Apr 17 14:19:36 2017 +0000
@@ -15,24 +15,20 @@
 #include "EthernetInterface.h"
 #include "WIFIDevice.h"
 
-const char* ECHO_SERVER_ADDRESS = "192.168.1.100";
+const char* ECHO_SERVER_ADDRESS = "192.168.2.13";
 const int ECHO_SERVER_PORT = 1030;
 
-Serial uart(p17, p16);//temporary define for alpha release
-
 void scanCallback(tstrM2mWifiscanResult result)
 {
-    uart.printf("SSID: %s \n", result.au8SSID);
-    uart.printf("RSSI: %i \n", result.s8rssi);
+    printf("SSID: %s \n", result.au8SSID);
+    printf("RSSI: %i \n", result.s8rssi);
 }
 
 int main() {
 
     EthernetInterface eth;
     WIFIDevice wifi;
-    
-    uart.baud(9600);
-        
+
     eth.init();
 
     wifi.apScan(scanCallback);
@@ -42,14 +38,14 @@
     eth.connect();    
 
     if(wifi.is_AP_connected())
-        uart.printf("Connect Success! \n");
+        printf("Connect Success! \n");
     else
-        uart.printf("Connect Fail! \n");    
+        printf("Connect Fail! \n");    
 
-    uart.printf("MAC: %s\n", eth.getMACAddress());            
-    uart.printf("IP: %s\n", eth.getIPAddress());
-    uart.printf("Gateway: %s\n", eth.getGateway());
-    uart.printf("NetworkMask: %s\n", eth.getNetworkMask()); 
+    printf("MAC: %s\n", eth.getMACAddress());            
+    printf("IP: %s\n", eth.getIPAddress());
+    printf("Gateway: %s\n", eth.getGateway());
+    printf("NetworkMask: %s\n", eth.getNetworkMask()); 
 
     UDPSocket sock;
     sock.init();
@@ -58,14 +54,18 @@
     echo_server.set_address(ECHO_SERVER_ADDRESS, ECHO_SERVER_PORT);
     
     char out_buffer[] = "Hello World";
-    uart.printf("Sending  message '%s' to server (%s)\n",out_buffer,ECHO_SERVER_ADDRESS);
+    printf("Sending  message '%s' to server (%s)\n",out_buffer,ECHO_SERVER_ADDRESS);
     sock.sendTo(echo_server, out_buffer, sizeof(out_buffer));
     
-    char in_buffer[256];
+    char in_buffer[256];    //IMPORTANT, array size MUST >= the actual received data size or set to maximum of 1400 if there is uncertainty
     int n = sock.receiveFrom(echo_server, in_buffer, sizeof(in_buffer));
     
-    in_buffer[n] = '\0';
-    uart.printf("Received message from server: '%s'\n", in_buffer);
+    if(n <0)
+        in_buffer[0] = '\0';//IMPORTANT, in case n = -1 when set_bloacking is timeout, prevent the illegal array in_buffer[-1] access 
+    else
+        in_buffer[n] = '\0';
+        
+    printf("Received message from server: '%s'\n", in_buffer);
     
     sock.close();