Some small updates

arduino/HalMultiSensor/SensorBH1750.cpp

@@ -51,7 +51,7 @@ based on Christopher Laws, March, 2013 code.
 
 void SensorBH1750::setup() {
   Wire.begin();
-  configure(BH1750_CONTINUOUS_HIGH_RES_MODE);
+  configure(BH1750_ONE_TIME_HIGH_RES_MODE);
 }
 
 

arduino/HalMultiSensor/SensorPhotocell.cpp

@@ -1,18 +1,20 @@
 #include "SensorPhotocell.h"
 #include <Arduino.h>
 
+void SensorPhotocell::interruptHandler()
+{
+    ++pulse;
+}
+
 
 void SensorPhotocell::setup()
 {
+    Interrupt::setCallback(SensorPhotocell::interruptHandler);
     Interrupt::setupPinInterrupt(PC2); //PC3
 }
 
 void SensorPhotocell::read(PowerData& data)
 {
     data.consumption = pulse;
-}
-
-void SensorPhotocell::reset()
-{
     pulse = 0;
 }

arduino/HalMultiSensor/SensorPhotocell.h

@@ -10,10 +10,11 @@ class SensorPhotocell : public SensorPowerConsumption
 public:
     virtual void setup();
     virtual void read(PowerData& data);
-    virtual void reset();
 
 private:
-    unsigned int pulse;
+    static unsigned int pulse;
+
+    static void interruptHandler();
 };
 
 #endif // SensorPhotocell_H

src/se/hal/plugin/tellstick/protocols/NexaSelfLearning.java

@@ -63,11 +63,13 @@ public class NexaSelfLearning extends TellstickProtocol
 
     public String encode(){
         try {
-            StringBuilder enc = new StringBuilder();
-            enc.append(new char[]{'T', 127, 255, 24, 1});
-            enc.append((char)132); // length
+            // T[t0][t1][t2][t3][length][d1]..[dn]+
+            StringBuilder enc = new StringBuilder(90); // Tellstick supports max 74 bytes
+            enc.append(new char[]{'T', 127, 255, 24, 0});
+            enc.append((char)0); // length
 
-            enc.append((char)0b0000_1001); // preamble
+            enc.append((char)0b1111_1001); // preamble
+            int length = 4;
             byte[] data = BinaryStructOutputStream.serialize(this);
             for (byte b : data){
                 for (int i=7; i>=0; --i){
@@ -75,8 +77,10 @@ public class NexaSelfLearning extends TellstickProtocol
                         enc.append((char) 0b1010_1000); // 0b1010_1000
                     else // 1
                         enc.append((char) 0b1000_1010); // 0b1000_1010
+                    length += 4;
                 }
             }
+            enc.setCharAt(5, (char)length); // Set calculated length
 
             enc.append("+");
             return enc.toString();

test/se/hal/plugin/tellstick/protocols/NexaSelfLearningTest.java

@@ -40,9 +40,10 @@ public class NexaSelfLearningTest {
 
         byte[] expected = Converter.toBytes(new char[]{
                         84, // T
-                        127, 255, 24, 1, 132, // timings
+                        127, 255, 24, 0, // timings
+                        132, // length
 
-                        9, // preamble
+                        0xF9, // preamble
                         168, 168, 138, 168, 138, 138, 168, 168, 138, 138,
                         138, 168, 138, 168, 168, 168, 168, 168, 168, 138,
                         138, 168, 168, 138, 138, 168, 168, 138, 168, 168,