Diff: main.cpp

Revision:

0:597aea501d68

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Dec 10 01:53:20 2015 +0000
@@ -0,0 +1,86 @@
+/*
+ * 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;
+}
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