TCP Echo Server Example using WizFi310
Dependencies: NetworkSocketAPI WizFi310Interface mbed
Prerequisite
This example shows that Wizwiki-W7500 and WizFi310 operates as a TCP server. When receiving data from a TCP client, it returns same data.
To implement this function, you need a Platform board and Wi-Fi board. Below are what we used.
- WIZwiki-W7500 from WIZnet (Platform board)
- WizFi310 from WIZnet (Wi-Fi board)
WIZwiki-W7500 Pin map
- D0 is for RXD, D1 is for TXD
- D6 is for CTS, D7 is for RTS
- D9 is for RESET
WizFi310 Pin map
- J1 is for RXD, J3 is for TXD
- SW6-1 is connected to D6 for RTS, SW6-2 is connected to D7 for CTS
- SW5-3 is connected to D9 for RESET
Software
Connect to Wi-Fi
wifi.connect(AP_SSID, AP_PASSWORD, AP_SECURITY);
Get information
const char *ip = wifi.get_ip_address(); const char *mac = wifi.get_mac_address();
Receive data and return to TCP client
while (true) { int n = clt_sock.recv(buffer, sizeof(buffer)); if( n < 0 ) { clt_sock.close(); srv.close(); } if( n > 0 ) { buffer[n] = '\0'; printf("length : %d\r\n", n); clt_sock.send(buffer, n); } }
Caution
TCP client and server should be in a same network.
Diff: main.cpp
- Revision:
- 0:50932ef4b276
- Child:
- 1:5981ba4a8323
diff -r 000000000000 -r 50932ef4b276 main.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Mon Apr 17 06:45:17 2017 +0000 @@ -0,0 +1,81 @@ +/* NetworkSocketAPI Example Program + * Copyright (c) 2015 ARM Limited + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "mbed.h" +#include "TCPSocket.h" +#include "mbed.h" +#include "WizFi310Interface.h" +#include "TCPSocket.h" +#include "TCPServer.h" + +#define TARGET_NUCLEO_F411RE + + +#if defined(TARGET_NUCLEO_F411RE) +Serial pc(USBTX, USBRX); +//WizFi310Internet wifi(PA_11, PA_12, D6, D7, D3, NC, 115200); +WizFi310Interface wifi(D8, D2, D7, D6, D9, NC, 115200); +#endif + +#if defined(TARGET_WIZwiki_W7500) +Serial pc(USBTX, USBRX); +WizFi310Interface wifi(D1, D0, D7, D6, D8, NC, 115200); +#endif + +#define AP_SSID "DIR-815_Wiznet" +#define AP_PASSWORD "12345678" +#define AP_SECURITY NSAPI_SECURITY_WPA2 + +int main() +{ + pc.baud(115200); + printf("WizFi310 NetworkSocketAPI TCP Client Example\r\n"); + + wifi.connect(AP_SSID, AP_PASSWORD, AP_SECURITY); + + const char *ip = wifi.get_ip_address(); + const char *mac = wifi.get_mac_address(); + printf("IP address is: %s\r\n", ip ? ip : "No IP"); + printf("MAC address is: %s\r\n", mac ? mac : "No MAC"); + + TCPServer srv; + TCPSocket clt_sock; + SocketAddress clt_addr; + + srv.open(&wifi); + srv.set_blocking(true); + srv.bind(80); + srv.listen(); + srv.accept(&clt_sock); + + char buffer[512]; + + while (true) + { + int n = clt_sock.recv(buffer, sizeof(buffer)); + if( n < 0 ) + { + clt_sock.close(); + srv.close(); + } + if( n > 0 ) + { + buffer[n] = '\0'; + printf("length : %d\r\n", n); + clt_sock.send(buffer, n); + } + } +}