demo of Murata wifi chip as TCP client.

Dependencies:   SNICInterface mbed-rtos mbed

Fork of murataDemo by Austin Blackstone

Intro

this program demonstrates how to use TCP on the Murata Wifi chip. It will connect to a server and send a message, the server will then send a reply. The reply will be printed out to the terminal on the microcontroller.

Instructions

  1. Make sure you have both the wifi device and the computer running the server on the same network / wifi router.
  2. Change the hard coded IP in the microcontroller code to match that of the laptop running the python server.
  3. Run the python2 script below on the computer
  4. Have a console hooked up to the microcontroller and watch as messages are sent back and forth between the server (python) and the client (murata).
  5. Run the microcontroller code on the device.

For ease of use numbers have been appended to the end of the messages being sent back and forth.

Python Server

Please run this python2.7 code on your computer. Make sure to change the IP Address in the microcontroller code to match the IP of your computer.

import socket
 
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(('', 7))
s.listen(1)
 
x = 0
while True:
    conn, addr = s.accept()
    print 'Connected b'TCP data from server: 'y', addr
    while True:
        # receive data from board
        data = conn.recv(1024)
        
        # check received data
        if not data: 
            break
        
        # print received data 
        print("TCP data from microcontroller: '"+data+"'")
        
        # send data to board with counter to differentiate messages
        conn.sendall("HelloFromPython!: "+str(x)+"\n\r")
        x+=1

    # close the port
    conn.close()

Committer:
mbedAustin
Date:
Wed Apr 01 23:05:11 2015 +0000
Revision:
29:9f08c7152c7a
Parent:
28:174412ff9671
Child:
30:de5a32932408
got some initial stuff working

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kishino 21:25b85cbbdd82 1 /* Copyright (C) 2014 Murata Manufacturing Co.,Ltd., MIT License
kishino 23:39cf9f03b076 2 * muRata, SWITCH SCIENCE Wi-FI module TypeYD SNIC-UART.
kishino 21:25b85cbbdd82 3 *
kishino 21:25b85cbbdd82 4 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
kishino 21:25b85cbbdd82 5 * and associated documentation files (the "Software"), to deal in the Software without restriction,
kishino 21:25b85cbbdd82 6 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
kishino 21:25b85cbbdd82 7 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
kishino 21:25b85cbbdd82 8 * furnished to do so, subject to the following conditions:
kishino 21:25b85cbbdd82 9 *
kishino 21:25b85cbbdd82 10 * The above copyright notice and this permission notice shall be included in all copies or
kishino 21:25b85cbbdd82 11 * substantial portions of the Software.
kishino 21:25b85cbbdd82 12 *
kishino 21:25b85cbbdd82 13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
kishino 21:25b85cbbdd82 14 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
kishino 21:25b85cbbdd82 15 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
kishino 21:25b85cbbdd82 16 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
kishino 21:25b85cbbdd82 17 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
kishino 21:25b85cbbdd82 18 */
xively 0:efdea27c3b81 19 #include "mbed.h"
kishino 14:6d58d3855feb 20 #include "SNIC_WifiInterface.h"
xively 7:0eff5db44b8b 21
mbedAustin 28:174412ff9671 22 Serial pc(USBTX, USBRX);
xively 7:0eff5db44b8b 23
errordeveloper 10:86ffba646df1 24
mbedAustin 29:9f08c7152c7a 25 #define WIFI_SSID "demossid"
mbedAustin 29:9f08c7152c7a 26 #define WIFI_SECURITY_TYPE e_SEC_OPEN
mbedAustin 28:174412ff9671 27 #define WIFI_SECUTIRY_KEY "WPA2_PASSPHRASE"
mbedAustin 28:174412ff9671 28 #define WIFI_SECUTIRY_KEY_LEN 15
errordeveloper 11:bdf601a405fc 29
mbedAustin 29:9f08c7152c7a 30 //#define WIFI_SSID "AP_SSID"
mbedAustin 29:9f08c7152c7a 31 //#define WIFI_SECURITY_TYPE e_SEC_WPA2_AES
mbedAustin 29:9f08c7152c7a 32 //#define WIFI_SECUTIRY_KEY "WPA2_PASSPHRASE"
mbedAustin 29:9f08c7152c7a 33 //#define WIFI_SECUTIRY_KEY_LEN 15
mbedAustin 29:9f08c7152c7a 34
mbedAustin 29:9f08c7152c7a 35
mbedAustin 28:174412ff9671 36 C_SNIC_WifiInterface wifi( D1, D0, NC, NC, D3 );
kishino 17:0bf3c49a83d5 37
mbedAustin 28:174412ff9671 38 int main()
mbedAustin 28:174412ff9671 39 {
mbedAustin 28:174412ff9671 40 // for built in debug printouts
mbedAustin 29:9f08c7152c7a 41 // pc.baud( 115200 );
mbedAustin 29:9f08c7152c7a 42
mbedAustin 29:9f08c7152c7a 43 int check = 0;
mbedAustin 28:174412ff9671 44
kishino 14:6d58d3855feb 45 // Initialize Wi-Fi interface
mbedAustin 29:9f08c7152c7a 46 check = wifi.init();
mbedAustin 29:9f08c7152c7a 47 if( check != 0 ) {
mbedAustin 28:174412ff9671 48 printf( "Wifi could not be initialized, halting.\r\n" );
kishino 14:6d58d3855feb 49 return -1;
mbedAustin 29:9f08c7152c7a 50 } else {
mbedAustin 28:174412ff9671 51 printf("wifi initialized successfully!\r\n");
mbedAustin 28:174412ff9671 52 }
kishino 19:4e2900daad59 53 wait(0.5);
mbedAustin 29:9f08c7152c7a 54
mbedAustin 28:174412ff9671 55 // good form to make sure you are disconnected from all AP's
mbedAustin 29:9f08c7152c7a 56 check = wifi.disconnect();
mbedAustin 29:9f08c7152c7a 57 if( check != 0 ) {
mbedAustin 28:174412ff9671 58 printf( "disconnect failed\r\n" );
mbedAustin 28:174412ff9671 59 return -1;
mbedAustin 29:9f08c7152c7a 60 } else {
mbedAustin 28:174412ff9671 61 printf("disconnection successful!\r\n");
mbedAustin 29:9f08c7152c7a 62 }
mbedAustin 28:174412ff9671 63 wait(0.3);
mbedAustin 29:9f08c7152c7a 64
mbedAustin 28:174412ff9671 65 // Connect AP
mbedAustin 29:9f08c7152c7a 66 check = wifi.connect( WIFI_SSID
mbedAustin 29:9f08c7152c7a 67 , strlen(WIFI_SSID)
mbedAustin 29:9f08c7152c7a 68 , WIFI_SECURITY_TYPE
mbedAustin 29:9f08c7152c7a 69 , WIFI_SECUTIRY_KEY
mbedAustin 29:9f08c7152c7a 70 , WIFI_SECUTIRY_KEY_LEN );
mbedAustin 29:9f08c7152c7a 71 if( check != 0) {
mbedAustin 29:9f08c7152c7a 72 printf("Connect Failed\r\n");
mbedAustin 29:9f08c7152c7a 73 } else {
mbedAustin 29:9f08c7152c7a 74 printf("connected successfully!\r\n");
mbedAustin 29:9f08c7152c7a 75 }
kishino 14:6d58d3855feb 76 wait(0.5);
kishino 14:6d58d3855feb 77
mbedAustin 29:9f08c7152c7a 78 // Get DHCP IP
mbedAustin 29:9f08c7152c7a 79 check = wifi.setIPConfig( true ); // get IP as DHCP IP
mbedAustin 29:9f08c7152c7a 80 if(check != 0) {
mbedAustin 29:9f08c7152c7a 81 printf("SetIPConfig failed \r\n");
mbedAustin 29:9f08c7152c7a 82 } else {
mbedAustin 29:9f08c7152c7a 83 printf("SetIPConfig successful \r\n");
mbedAustin 29:9f08c7152c7a 84 }
mbedAustin 29:9f08c7152c7a 85
mbedAustin 29:9f08c7152c7a 86 // Get RSSI
mbedAustin 29:9f08c7152c7a 87 signed char temp = 0;
mbedAustin 29:9f08c7152c7a 88 check = wifi.getRssi(&temp);
mbedAustin 29:9f08c7152c7a 89 if(check != 0){
mbedAustin 29:9f08c7152c7a 90 printf("getRssi failed. \r\n");
mbedAustin 29:9f08c7152c7a 91 }else{
mbedAustin 29:9f08c7152c7a 92 printf("getRssi success: %d \r\n",temp);
mbedAustin 29:9f08c7152c7a 93 }
mbedAustin 29:9f08c7152c7a 94
mbedAustin 29:9f08c7152c7a 95 // if(check != 0){
mbedAustin 29:9f08c7152c7a 96 // printf(" \r\n");
mbedAustin 29:9f08c7152c7a 97 // }else{
mbedAustin 29:9f08c7152c7a 98 // printf(" \r\n");
mbedAustin 29:9f08c7152c7a 99 // }
mbedAustin 28:174412ff9671 100
mbedAustin 28:174412ff9671 101 wait( 1.0 );
Ilya Dmitrichenko 6:9e4f4a8c1829 102 }