robin luo / Mbed 2 deprecated mbed_sensorthings

Simple code to upload temperature readings to SensorUp SensorThings Playground (http://pg.sensorup.com)from the LM75B temperature sensor in a mbed application board.It works with mbed LPC1768.

Dependencies:   C12832 EthernetNetIf LM75B mbed

main.cpp@0:597aea501d68, 2015-12-10 (annotated)

Committer:
robinlk
Date:
Thu Dec 10 01:53:20 2015 +0000
Revision:
0:597aea501d68
Simple code to upload temperature readings to SensorUp SensorThings Playground (http://pg.sensorup.com)from the LM75B temperature sensor in an mbed application board.It works with mbed LPC1768.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
robinlk 0:597aea501d68 1 /*
robinlk 0:597aea501d68 2 * This content is released under the (https://opensource.org/licenses/MIT) MIT License.
robinlk 0:597aea501d68 3 *
robinlk 0:597aea501d68 4 * Simple code to upload temperature readings to SensorUp SensorThings Playground (http://pg.sensorup.com)
robinlk 0:597aea501d68 5 * from the LM75B temperature sensor(https://developer.mbed.org/cookbook/LM75B-Temperature-Sensor)
robinlk 0:597aea501d68 6 * in an mbed application board(https://developer.mbed.org/cookbook/mbed-application-board)
robinlk 0:597aea501d68 7 * It works with mbed LPC1768. (https://developer.mbed.org/platforms/mbed-LPC1768/)
robinlk 0:597aea501d68 8 */
robinlk 0:597aea501d68 9 #include "mbed.h"
robinlk 0:597aea501d68 10 #include "EthernetNetIf.h"
robinlk 0:597aea501d68 11 #include "TCPSocket.h"
robinlk 0:597aea501d68 12 #include "TinyHTTP.h"
robinlk 0:597aea501d68 13 #include "LM75B.h"
robinlk 0:597aea501d68 14 #include "C12832.h"
robinlk 0:597aea501d68 15
robinlk 0:597aea501d68 16 /*
robinlk 0:597aea501d68 17 * Change the DATASTREAM_ID_TEMP to the id of you SensorThigns Datastream.
robinlk 0:597aea501d68 18 * You can get the Datastream <id> from the SensorUp playground's Observation
robinlk 0:597aea501d68 19 * API Request:/st-playground/proxy/v1.0/Datastreams(<id>)/Observations
robinlk 0:597aea501d68 20 */
robinlk 0:597aea501d68 21 const int DATASTREAM_ID_TEMP = 116680;
robinlk 0:597aea501d68 22 /*
robinlk 0:597aea501d68 23 * Change the ACCESS_TOKEN to the token of you SensorThigns Datastream
robinlk 0:597aea501d68 24 * You can get the ACCESS_TOKEN from the SensorUp playground's Observation
robinlk 0:597aea501d68 25 * API Request: St-P-Access-Token: 78cc7eb2-9394-4675-b231-ff0a377a3674
robinlk 0:597aea501d68 26 */
robinlk 0:597aea501d68 27 const char *ACCESS_TOKEN = "78cc7eb2-9394-4675-b231-ff0a377a3674";
robinlk 0:597aea501d68 28 /*
robinlk 0:597aea501d68 29 * Interval(second) to post temperature
robinlk 0:597aea501d68 30 */
robinlk 0:597aea501d68 31 const int INTERVAL = 5;
robinlk 0:597aea501d68 32 // Temperature sensor
robinlk 0:597aea501d68 33 LM75B sensor(p28,p27);
robinlk 0:597aea501d68 34 //Ethernet network interface
robinlk 0:597aea501d68 35 EthernetNetIf eth;
robinlk 0:597aea501d68 36 //LCD
robinlk 0:597aea501d68 37 C12832 lcd(p5, p7, p6, p8, p11);
robinlk 0:597aea501d68 38
robinlk 0:597aea501d68 39 int postToServer(float temp)
robinlk 0:597aea501d68 40 {
robinlk 0:597aea501d68 41 Host host;
robinlk 0:597aea501d68 42 char msg[50],uri[100], head[160];
robinlk 0:597aea501d68 43 // header
robinlk 0:597aea501d68 44 snprintf(head, sizeof(head), "Content-type: application/json\r\nSt-P-Access-Token: %s\r\n", ACCESS_TOKEN);
robinlk 0:597aea501d68 45 // uri
robinlk 0:597aea501d68 46 snprintf(uri, sizeof(uri), "/st-playground/proxy/v1.0/Datastreams(%d)/Observations", DATASTREAM_ID_TEMP);
robinlk 0:597aea501d68 47 // msg
robinlk 0:597aea501d68 48 snprintf(msg, sizeof(msg), "{\"result\":%.3f\n}", temp);
robinlk 0:597aea501d68 49
robinlk 0:597aea501d68 50 host.setName("pg-api.sensorup.com");
robinlk 0:597aea501d68 51 host.setPort(HTTP_PORT);
robinlk 0:597aea501d68 52 return httpRequest(METHOD_POST, &host, uri, head, msg);
robinlk 0:597aea501d68 53 }
robinlk 0:597aea501d68 54
robinlk 0:597aea501d68 55 int main () {
robinlk 0:597aea501d68 56 EthernetErr ethErr;
robinlk 0:597aea501d68 57 Host host;
robinlk 0:597aea501d68 58 int r;
robinlk 0:597aea501d68 59 // Start the Ethernet connection
robinlk 0:597aea501d68 60 ethErr = eth.setup();
robinlk 0:597aea501d68 61 if(ethErr) {
robinlk 0:597aea501d68 62 printf("connect error\r\n");
robinlk 0:597aea501d68 63 return -1;
robinlk 0:597aea501d68 64 }
robinlk 0:597aea501d68 65 printf("start\r\n");
robinlk 0:597aea501d68 66
robinlk 0:597aea501d68 67 //Try to open the LM75B
robinlk 0:597aea501d68 68 if (sensor.open()) {
robinlk 0:597aea501d68 69 printf("Device detected!\n");
robinlk 0:597aea501d68 70
robinlk 0:597aea501d68 71 while (1) {
robinlk 0:597aea501d68 72 lcd.cls();
robinlk 0:597aea501d68 73 lcd.locate(0,3);
robinlk 0:597aea501d68 74 //Display the air temperature on LCD
robinlk 0:597aea501d68 75 //The returned temperature is in degrees Celcius.
robinlk 0:597aea501d68 76 lcd.printf("Temp = %.3f\n", (float)sensor);
robinlk 0:597aea501d68 77 // Post temperature to SensorUp SensorThings Playground
robinlk 0:597aea501d68 78 r = postToServer((float)sensor);
robinlk 0:597aea501d68 79 printf("status %d\r\n", r);
robinlk 0:597aea501d68 80 wait(INTERVAL);
robinlk 0:597aea501d68 81 }
robinlk 0:597aea501d68 82 } else {
robinlk 0:597aea501d68 83 error("Device not detected!\n");
robinlk 0:597aea501d68 84 }
robinlk 0:597aea501d68 85 return 0;
robinlk 0:597aea501d68 86 }