Added C example of our sensor-api using callbacks

examples/c/sensors/callback/Makefile

@@ -0,0 +1,13 @@
+CC=gcc
+CFLAGS=-Wall -ltelldus-core
+
+OBJS = main.o
+
+all: ${OBJS}
+	${CC} -o sensor ${CFLAGS} ${OBJS}
+
+main.c:
+	${CC} ${CFLAGS} -c main.c
+
+clean:
+	rm -f sensor main.o

examples/c/sensors/callback/main.c

@@ -0,0 +1,43 @@
+#include <telldus-core.h>
+#include <time.h>
+#include <stdio.h>
+#include <unistd.h>
+
+void WINAPI sensorEvent(const char *protocol, const char *model, int sensorId, int dataType, const char *value, int ts, int callbackId, void *context) {
+	char timeBuf[80];
+	time_t timestamp = ts;
+	
+	//Print the sensor
+	printf("%s,\t%s,\t%i\n", protocol, model, sensorId);
+
+	//Retrieve the values the sensor supports
+	if (dataType == TELLSTICK_TEMPERATURE) {
+		strftime(timeBuf, sizeof(timeBuf), "%Y-%m-%d %H:%M:%S", localtime(&timestamp));
+		printf("Temperature:\t%sº\t(%s)\n", value, timeBuf);
+		
+	} else if (dataType == TELLSTICK_HUMIDITY) {
+		strftime(timeBuf, sizeof(timeBuf), "%Y-%m-%d %H:%M:%S", localtime(&timestamp));
+		printf("Humidity:\t%s%%\t(%s)\n", value, timeBuf);
+	}
+	printf("\n");
+}
+
+int main(void) {
+	int callbackId = 0;
+	
+	tdInit();
+
+	//Register for callback
+	callbackId = tdRegisterSensorEvent( (TDSensorEvent)&sensorEvent, 0 );
+
+	//Our own simple eventloop
+	while(1) {
+		sleep(100);
+	}
+
+	//Cleanup
+	tdUnregisterCallback( callbackId );
+	tdClose();
+
+	return 0;
+}