Diff: main.cpp

Revision:

0:e84b2d4ab961

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun May 03 06:19:47 2015 +0000
@@ -0,0 +1,36 @@
+#include "mbed.h"
+#include "EthernetInterface.h"
+#include "Websocket.h"
+#include "DigitDisplay.h"
+
+DigitalOut myled(LED2);
+EthernetInterface eth;
+DigitDisplay display(P4_29, P4_28);
+AnalogIn ain(P0_23);
+
+int a;
+float temperature;
+int B=3975;                                                         //B value of the thermistor
+float resistance;
+
+int main()
+{
+    char data[256];
+    eth.init();
+    eth.connect();
+    Websocket ws("ws://wot.city/object/554588e158e328ae620000ab/send");
+    ws.connect();
+    while(1) {
+// multiply ain by 675 if the Grove shield is set to 5V or 1023 if set to 3.3V
+        a=ain*675;
+        resistance=(float)(1023-a)*10000/a;                         //get the resistance of the sensor;
+        temperature=1/(log(resistance/10000)/B+1/298.15)-273.15;    //convert to temperature via datasheet ;
+        myled = 1;
+        wait(0.8);
+        myled = 0;
+        wait(0.8);
+        display.write(temperature);
+        sprintf( data , "{ \"temperature\": %f }",temperature);
+        ws.send(data);
+    }
+}
\ No newline at end of file