File content as of revision 0:597aea501d68:

/*
 * This content is released under the (https://opensource.org/licenses/MIT) MIT License.
 *
 * Simple code to upload temperature readings to SensorUp SensorThings Playground (http://pg.sensorup.com)
 * from the LM75B temperature sensor(https://developer.mbed.org/cookbook/LM75B-Temperature-Sensor)   
 * in an mbed application board(https://developer.mbed.org/cookbook/mbed-application-board)
 * It works with mbed LPC1768. (https://developer.mbed.org/platforms/mbed-LPC1768/)
 */
#include "mbed.h"
#include "EthernetNetIf.h"
#include "TCPSocket.h"
#include "TinyHTTP.h"
#include "LM75B.h"
#include "C12832.h"

/*
* Change the DATASTREAM_ID_TEMP to the id of you SensorThigns Datastream.
* You can get the Datastream <id> from the SensorUp playground's Observation
* API Request:/st-playground/proxy/v1.0/Datastreams(<id>)/Observations
*/
const int DATASTREAM_ID_TEMP = 116680;
/*
* Change the ACCESS_TOKEN to the token of you SensorThigns Datastream
* You can get the ACCESS_TOKEN from the SensorUp playground's Observation 
* API Request: St-P-Access-Token: 78cc7eb2-9394-4675-b231-ff0a377a3674
*/
const char *ACCESS_TOKEN = "78cc7eb2-9394-4675-b231-ff0a377a3674";
/*
* Interval(second) to post temperature
*/
const int INTERVAL  = 5;
// Temperature sensor
LM75B sensor(p28,p27);
//Ethernet network interface
EthernetNetIf eth;
//LCD
C12832 lcd(p5, p7, p6, p8, p11);

int postToServer(float temp)
{
    Host host;
	char msg[50],uri[100], head[160];
	// header
	snprintf(head, sizeof(head), "Content-type: application/json\r\nSt-P-Access-Token: %s\r\n", ACCESS_TOKEN);
	// uri
	snprintf(uri, sizeof(uri), "/st-playground/proxy/v1.0/Datastreams(%d)/Observations", DATASTREAM_ID_TEMP);
	// msg
	snprintf(msg, sizeof(msg), "{\"result\":%.3f\n}", temp);

	host.setName("pg-api.sensorup.com");
	host.setPort(HTTP_PORT);
	return httpRequest(METHOD_POST, &host, uri, head, msg);
}

int main () {
    EthernetErr ethErr;
    Host host;
    int r;
	// Start the Ethernet connection
    ethErr = eth.setup();
    if(ethErr) {
        printf("connect error\r\n");
        return -1;
    }
	printf("start\r\n");

 	//Try to open the LM75B
    if (sensor.open()) {
        printf("Device detected!\n");

        while (1) {
            lcd.cls();
            lcd.locate(0,3);
            //Display the air temperature on LCD
            //The returned temperature is in degrees Celcius.
            lcd.printf("Temp = %.3f\n", (float)sensor);
            // Post temperature to SensorUp SensorThings Playground
            r = postToServer((float)sensor);
            printf("status %d\r\n", r);
            wait(INTERVAL);
        }
    } else {
        error("Device not detected!\n");
    }
    return 0;
}