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:
errordeveloper
Date:
Mon Oct 14 12:08:18 2013 +0000
Revision:
10:86ffba646df1
Parent:
9:c5dc85d192e2
Child:
11:bdf601a405fc
Updated all dependencies and fixed issue with mixing C and C++

Who changed what in which revision?

UserRevisionLine numberNew contents of line
xively 0:efdea27c3b81 1 #include "mbed.h"
xively 0:efdea27c3b81 2 #include "EthernetInterface.h"
xively 7:0eff5db44b8b 3
xively 7:0eff5db44b8b 4 #define XI_FEED_ID 128488 // set Xively Feed ID (numerical, no quoutes
errordeveloper 10:86ffba646df1 5 #define XI_API_KEY "T4KXAH_dasgw1PWBPc3fdsfsdgsdy-dUc4ND0g" // set Xively API key (double-quoted string)
errordeveloper 10:86ffba646df1 6
errordeveloper 10:86ffba646df1 7 #include "app_board_io.h"
xively 7:0eff5db44b8b 8
xively 0:efdea27c3b81 9 #include "xively.h"
xively 0:efdea27c3b81 10 #include "xi_err.h"
xively 0:efdea27c3b81 11
errordeveloper 10:86ffba646df1 12 #include "MMA7660.h"
errordeveloper 10:86ffba646df1 13 #include "LM75B.h"
errordeveloper 10:86ffba646df1 14
xively 0:efdea27c3b81 15 MMA7660 axl(p28, p27);
xively 3:7ad3f6543b6e 16 LM75B tmp(p28, p27);
xively 0:efdea27c3b81 17
xively 0:efdea27c3b81 18 int main() {
xively 0:efdea27c3b81 19
xively 0:efdea27c3b81 20 EthernetInterface eth;
xively 0:efdea27c3b81 21
xively 0:efdea27c3b81 22 int s = eth.init(); //Use DHCP
xively 0:efdea27c3b81 23
xively 0:efdea27c3b81 24 if( s != NULL )
xively 0:efdea27c3b81 25 {
xively 7:0eff5db44b8b 26 lcd_printf( "Could not initialise. Will halt!\n" );
xively 0:efdea27c3b81 27 exit( 0 );
xively 0:efdea27c3b81 28 }
xively 0:efdea27c3b81 29
xively 0:efdea27c3b81 30 s = eth.connect();
xively 0:efdea27c3b81 31
xively 0:efdea27c3b81 32 if( s != NULL )
xively 0:efdea27c3b81 33 {
xively 7:0eff5db44b8b 34 lcd_printf( "Could not connect. Will halt!\n" );
xively 0:efdea27c3b81 35 exit( 0 );
xively 0:efdea27c3b81 36 }
xively 0:efdea27c3b81 37 else
xively 0:efdea27c3b81 38 {
xively 7:0eff5db44b8b 39 lcd_printf( "IP: %s\n", eth.getIPAddress() );
xively 0:efdea27c3b81 40 }
xively 0:efdea27c3b81 41
xively 0:efdea27c3b81 42 xi_feed_t feed;
xively 0:efdea27c3b81 43 memset( &feed, NULL, sizeof( xi_feed_t ) );
xively 0:efdea27c3b81 44
xively 0:efdea27c3b81 45 feed.feed_id = XI_FEED_ID;
xively 3:7ad3f6543b6e 46 feed.datastream_count = 3;
xively 0:efdea27c3b81 47
xively 0:efdea27c3b81 48 feed.datastreams[0].datapoint_count = 1;
xively 0:efdea27c3b81 49 xi_datastream_t* orientation_datastream = &feed.datastreams[0];
xively 0:efdea27c3b81 50 strcpy( orientation_datastream->datastream_id, "orientation" );
xively 0:efdea27c3b81 51 xi_datapoint_t* current_orientation = &orientation_datastream->datapoints[0];
xively 0:efdea27c3b81 52
xively 0:efdea27c3b81 53 feed.datastreams[1].datapoint_count = 1;
xively 0:efdea27c3b81 54 xi_datastream_t* side_rotation_datastream = &feed.datastreams[1];
xively 0:efdea27c3b81 55 strcpy( side_rotation_datastream->datastream_id, "side_rotation" );
xively 0:efdea27c3b81 56 xi_datapoint_t* current_side_rotation = &side_rotation_datastream->datapoints[0];
xively 0:efdea27c3b81 57
xively 3:7ad3f6543b6e 58 feed.datastreams[2].datapoint_count = 1;
xively 3:7ad3f6543b6e 59 xi_datastream_t* temperature_datastream = &feed.datastreams[2];
xively 3:7ad3f6543b6e 60 strcpy( temperature_datastream->datastream_id, "temperature" );
xively 3:7ad3f6543b6e 61 xi_datapoint_t* current_temperature = &temperature_datastream->datapoints[0];
xively 3:7ad3f6543b6e 62
xively 0:efdea27c3b81 63 // create the cosm library context
xively 0:efdea27c3b81 64 xi_context_t* xi_context
xively 0:efdea27c3b81 65 = xi_create_context( XI_HTTP, XI_API_KEY, feed.feed_id );
xively 0:efdea27c3b81 66
xively 0:efdea27c3b81 67 // check if everything works
xively 0:efdea27c3b81 68 if( xi_context == NULL )
xively 0:efdea27c3b81 69 {
xively 0:efdea27c3b81 70 return -1;
xively 0:efdea27c3b81 71 }
xively 0:efdea27c3b81 72
xively 7:0eff5db44b8b 73 lcd_printf("feed:%d datastreams:[%s,%s]\n", feed.feed_id,
xively 0:efdea27c3b81 74 orientation_datastream->datastream_id,
xively 0:efdea27c3b81 75 side_rotation_datastream->datastream_id);
xively 0:efdea27c3b81 76
xively 0:efdea27c3b81 77 while(1) {
xively 0:efdea27c3b81 78
xively 0:efdea27c3b81 79 switch( axl.getSide() ) {
xively 0:efdea27c3b81 80 case MMA7660::Front:
xively 0:efdea27c3b81 81 xi_set_value_str( current_side_rotation, "front" );
xively 0:efdea27c3b81 82 break;
xively 0:efdea27c3b81 83 case MMA7660::Back:
xively 0:efdea27c3b81 84 xi_set_value_str( current_side_rotation, "back" );
xively 0:efdea27c3b81 85 break;
xively 0:efdea27c3b81 86 default:
xively 0:efdea27c3b81 87 xi_set_value_str( current_side_rotation, "unknown" );
xively 0:efdea27c3b81 88 break;
xively 0:efdea27c3b81 89 }
xively 0:efdea27c3b81 90
xively 0:efdea27c3b81 91 switch( axl.getOrientation() ) {
xively 0:efdea27c3b81 92 case MMA7660::Down:
xively 7:0eff5db44b8b 93 lcd_printf("down %s\n",
xively 0:efdea27c3b81 94 (axl.getSide() == MMA7660::Front ? "front" : "back"));
xively 0:efdea27c3b81 95 xi_set_value_str( current_orientation, "down" );
xively 0:efdea27c3b81 96 break;
xively 0:efdea27c3b81 97 case MMA7660::Up:
xively 7:0eff5db44b8b 98 lcd_printf("up %s\n",
xively 0:efdea27c3b81 99 (axl.getSide() == MMA7660::Front ? "front" : "back"));
xively 0:efdea27c3b81 100 xi_set_value_str( current_orientation, "up" );
xively 0:efdea27c3b81 101 break;
xively 0:efdea27c3b81 102 case MMA7660::Right:
xively 7:0eff5db44b8b 103 lcd_printf("right %s\n",
xively 0:efdea27c3b81 104 (axl.getSide() == MMA7660::Front ? "front" : "back"));
xively 0:efdea27c3b81 105 xi_set_value_str( current_orientation, "right" );
xively 0:efdea27c3b81 106 break;
xively 0:efdea27c3b81 107 case MMA7660::Left:
xively 7:0eff5db44b8b 108 lcd_printf("left %s\n",
xively 0:efdea27c3b81 109 (axl.getSide() == MMA7660::Front ? "front" : "back"));
xively 0:efdea27c3b81 110 xi_set_value_str( current_orientation, "left" );
xively 0:efdea27c3b81 111 break;
xively 0:efdea27c3b81 112 default:
xively 0:efdea27c3b81 113 xi_set_value_str( current_orientation, "unknown" );
xively 0:efdea27c3b81 114 break;
xively 0:efdea27c3b81 115 }
xively 3:7ad3f6543b6e 116
xively 3:7ad3f6543b6e 117 xi_set_value_f32( current_temperature, tmp.read() );
xively 4:e7ca62a11595 118
xively 7:0eff5db44b8b 119 lcd_printf( "update...\n" );
xively 0:efdea27c3b81 120 xi_feed_update(xi_context, &feed);
xively 7:0eff5db44b8b 121 lcd_printf( "done...\n" );
xively 3:7ad3f6543b6e 122
xively 3:7ad3f6543b6e 123 wait( 15.0 );
xively 0:efdea27c3b81 124 }
Ilya Dmitrichenko 6:9e4f4a8c1829 125 }