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:
Ilya Dmitrichenko
Date:
Mon Oct 14 11:58:41 2013 +0100
Revision:
9:c5dc85d192e2
Parent:
8:81743e1228a7
Child:
10:86ffba646df1
Add user config header as it's now required

(see https://github.com/xively/libxively/issues/51)

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
xively 7:0eff5db44b8b 5 #define XI_API_KEY "T4KXAH_dasgw1PWBPc3fdsfsdgsdy-dUc4ND0g" // set Xively API key (double-quoted string)
xively 7:0eff5db44b8b 6
xively 0:efdea27c3b81 7 #include "xively.h"
xively 0:efdea27c3b81 8 #include "xi_err.h"
xively 0:efdea27c3b81 9
xively 0:efdea27c3b81 10 MMA7660 axl(p28, p27);
xively 3:7ad3f6543b6e 11 LM75B tmp(p28, p27);
xively 0:efdea27c3b81 12
xively 0:efdea27c3b81 13 int main() {
xively 0:efdea27c3b81 14
xively 0:efdea27c3b81 15 EthernetInterface eth;
xively 0:efdea27c3b81 16
xively 0:efdea27c3b81 17 int s = eth.init(); //Use DHCP
xively 0:efdea27c3b81 18
xively 0:efdea27c3b81 19 if( s != NULL )
xively 0:efdea27c3b81 20 {
xively 7:0eff5db44b8b 21 lcd_printf( "Could not initialise. Will halt!\n" );
xively 0:efdea27c3b81 22 exit( 0 );
xively 0:efdea27c3b81 23 }
xively 0:efdea27c3b81 24
xively 0:efdea27c3b81 25 s = eth.connect();
xively 0:efdea27c3b81 26
xively 0:efdea27c3b81 27 if( s != NULL )
xively 0:efdea27c3b81 28 {
xively 7:0eff5db44b8b 29 lcd_printf( "Could not connect. Will halt!\n" );
xively 0:efdea27c3b81 30 exit( 0 );
xively 0:efdea27c3b81 31 }
xively 0:efdea27c3b81 32 else
xively 0:efdea27c3b81 33 {
xively 7:0eff5db44b8b 34 lcd_printf( "IP: %s\n", eth.getIPAddress() );
xively 0:efdea27c3b81 35 }
xively 0:efdea27c3b81 36
xively 0:efdea27c3b81 37 xi_feed_t feed;
xively 0:efdea27c3b81 38 memset( &feed, NULL, sizeof( xi_feed_t ) );
xively 0:efdea27c3b81 39
xively 0:efdea27c3b81 40 feed.feed_id = XI_FEED_ID;
xively 3:7ad3f6543b6e 41 feed.datastream_count = 3;
xively 0:efdea27c3b81 42
xively 0:efdea27c3b81 43 feed.datastreams[0].datapoint_count = 1;
xively 0:efdea27c3b81 44 xi_datastream_t* orientation_datastream = &feed.datastreams[0];
xively 0:efdea27c3b81 45 strcpy( orientation_datastream->datastream_id, "orientation" );
xively 0:efdea27c3b81 46 xi_datapoint_t* current_orientation = &orientation_datastream->datapoints[0];
xively 0:efdea27c3b81 47
xively 0:efdea27c3b81 48 feed.datastreams[1].datapoint_count = 1;
xively 0:efdea27c3b81 49 xi_datastream_t* side_rotation_datastream = &feed.datastreams[1];
xively 0:efdea27c3b81 50 strcpy( side_rotation_datastream->datastream_id, "side_rotation" );
xively 0:efdea27c3b81 51 xi_datapoint_t* current_side_rotation = &side_rotation_datastream->datapoints[0];
xively 0:efdea27c3b81 52
xively 3:7ad3f6543b6e 53 feed.datastreams[2].datapoint_count = 1;
xively 3:7ad3f6543b6e 54 xi_datastream_t* temperature_datastream = &feed.datastreams[2];
xively 3:7ad3f6543b6e 55 strcpy( temperature_datastream->datastream_id, "temperature" );
xively 3:7ad3f6543b6e 56 xi_datapoint_t* current_temperature = &temperature_datastream->datapoints[0];
xively 3:7ad3f6543b6e 57
xively 0:efdea27c3b81 58 // create the cosm library context
xively 0:efdea27c3b81 59 xi_context_t* xi_context
xively 0:efdea27c3b81 60 = xi_create_context( XI_HTTP, XI_API_KEY, feed.feed_id );
xively 0:efdea27c3b81 61
xively 0:efdea27c3b81 62 // check if everything works
xively 0:efdea27c3b81 63 if( xi_context == NULL )
xively 0:efdea27c3b81 64 {
xively 0:efdea27c3b81 65 return -1;
xively 0:efdea27c3b81 66 }
xively 0:efdea27c3b81 67
xively 7:0eff5db44b8b 68 lcd_printf("feed:%d datastreams:[%s,%s]\n", feed.feed_id,
xively 0:efdea27c3b81 69 orientation_datastream->datastream_id,
xively 0:efdea27c3b81 70 side_rotation_datastream->datastream_id);
xively 0:efdea27c3b81 71
xively 0:efdea27c3b81 72 while(1) {
xively 0:efdea27c3b81 73
xively 0:efdea27c3b81 74 switch( axl.getSide() ) {
xively 0:efdea27c3b81 75 case MMA7660::Front:
xively 0:efdea27c3b81 76 xi_set_value_str( current_side_rotation, "front" );
xively 0:efdea27c3b81 77 break;
xively 0:efdea27c3b81 78 case MMA7660::Back:
xively 0:efdea27c3b81 79 xi_set_value_str( current_side_rotation, "back" );
xively 0:efdea27c3b81 80 break;
xively 0:efdea27c3b81 81 default:
xively 0:efdea27c3b81 82 xi_set_value_str( current_side_rotation, "unknown" );
xively 0:efdea27c3b81 83 break;
xively 0:efdea27c3b81 84 }
xively 0:efdea27c3b81 85
xively 0:efdea27c3b81 86 switch( axl.getOrientation() ) {
xively 0:efdea27c3b81 87 case MMA7660::Down:
xively 7:0eff5db44b8b 88 lcd_printf("down %s\n",
xively 0:efdea27c3b81 89 (axl.getSide() == MMA7660::Front ? "front" : "back"));
xively 0:efdea27c3b81 90 xi_set_value_str( current_orientation, "down" );
xively 0:efdea27c3b81 91 break;
xively 0:efdea27c3b81 92 case MMA7660::Up:
xively 7:0eff5db44b8b 93 lcd_printf("up %s\n",
xively 0:efdea27c3b81 94 (axl.getSide() == MMA7660::Front ? "front" : "back"));
xively 0:efdea27c3b81 95 xi_set_value_str( current_orientation, "up" );
xively 0:efdea27c3b81 96 break;
xively 0:efdea27c3b81 97 case MMA7660::Right:
xively 7:0eff5db44b8b 98 lcd_printf("right %s\n",
xively 0:efdea27c3b81 99 (axl.getSide() == MMA7660::Front ? "front" : "back"));
xively 0:efdea27c3b81 100 xi_set_value_str( current_orientation, "right" );
xively 0:efdea27c3b81 101 break;
xively 0:efdea27c3b81 102 case MMA7660::Left:
xively 7:0eff5db44b8b 103 lcd_printf("left %s\n",
xively 0:efdea27c3b81 104 (axl.getSide() == MMA7660::Front ? "front" : "back"));
xively 0:efdea27c3b81 105 xi_set_value_str( current_orientation, "left" );
xively 0:efdea27c3b81 106 break;
xively 0:efdea27c3b81 107 default:
xively 0:efdea27c3b81 108 xi_set_value_str( current_orientation, "unknown" );
xively 0:efdea27c3b81 109 break;
xively 0:efdea27c3b81 110 }
xively 3:7ad3f6543b6e 111
xively 3:7ad3f6543b6e 112 xi_set_value_f32( current_temperature, tmp.read() );
xively 4:e7ca62a11595 113
xively 7:0eff5db44b8b 114 lcd_printf( "update...\n" );
xively 0:efdea27c3b81 115 xi_feed_update(xi_context, &feed);
xively 7:0eff5db44b8b 116 lcd_printf( "done...\n" );
xively 3:7ad3f6543b6e 117
xively 3:7ad3f6543b6e 118 wait( 15.0 );
xively 0:efdea27c3b81 119 }
Ilya Dmitrichenko 6:9e4f4a8c1829 120 }