initial upload

examples/osd/arduino-htu21/sketch.pde

@@ -0,0 +1,71 @@
+/*
+ * Sample arduino sketch using contiki features.
+ * We turn the LED off 
+ * We allow read the moisture sensor
+ * Unfortunately sleeping for long times in loop() isn't currently
+ * possible, something turns off the CPU (including PWM outputs) if a
+ * Proto-Thread is taking too long. We need to find out how to sleep in
+ * a Contiki-compatible way.
+ * Note that for a normal arduino sketch you won't have to include any
+ * of the contiki-specific files here, the sketch should just work.
+ */
+
+#include <Wire.h>
+#include "Adafruit_HTU21DF.h"
+
+extern "C" {
+
+
+#include "rest-engine.h"
+
+extern volatile uint8_t mcusleepcycle;  // default 16
+
+Adafruit_HTU21DF htu = Adafruit_HTU21DF();
+
+extern resource_t res_htu21dtemp, res_htu21dhum, res_battery;
+float htu21d_hum;
+float htu21d_temp;
+char  htu21d_hum_s[8];
+char  htu21d_temp_s[8];
+
+#define LED_PIN 4
+}
+
+void setup (void)
+{
+    // switch off the led
+    pinMode(LED_PIN, OUTPUT);
+    digitalWrite(LED_PIN, HIGH);
+    // htu21d sensor
+    if (!htu.begin()) {
+      printf("Couldn't find sensor!");
+    }
+    // init coap resourcen
+    rest_init_engine ();
+    rest_activate_resource (&res_htu21dtemp, "s/temp");
+    rest_activate_resource (&res_htu21dhum, "s/hum");
+    rest_activate_resource (&res_battery, "s/battery");
+}
+
+// at project-conf.h
+// LOOP_INTERVAL		(10 * CLOCK_SECOND)
+void loop (void)
+{
+      mcusleepcycle=0;  // dont sleep
+      htu21d_temp = htu.readTemperature();
+      htu21d_hum = htu.readHumidity();
+      mcusleepcycle=32; // sleep, wakeup every 32 cycles
+      dtostrf(htu21d_temp , 6, 2, htu21d_temp_s );   
+      dtostrf(htu21d_hum , 6, 2, htu21d_hum_s );
+      // remove space
+      if(htu21d_temp_s[0]==' '){
+        memcpy (htu21d_temp_s,htu21d_temp_s+1,strlen(htu21d_temp_s)+1);
+      }
+      if(htu21d_hum_s[0]==' '){
+        memcpy (htu21d_hum_s,htu21d_hum_s+1,strlen(htu21d_hum_s)+1);
+      }
+      
+//  debug only   
+//	  printf("Temp: %s",htu21d_temp_s);
+//    printf("\t\tHum: %s\n",htu21d_hum_s);
+}