diff --git a/de.ibapl.onewire4j/src/main/java/de/ibapl/onewire4j/container/OneWireDevice26.java b/de.ibapl.onewire4j/src/main/java/de/ibapl/onewire4j/container/OneWireDevice26.java
index b14925a..45aeec6 100644
--- a/de.ibapl.onewire4j/src/main/java/de/ibapl/onewire4j/container/OneWireDevice26.java
+++ b/de.ibapl.onewire4j/src/main/java/de/ibapl/onewire4j/container/OneWireDevice26.java
@@ -85,15 +85,26 @@ public byte getStatusConfiguration() {
             return data[0];
         }
 
+        final public boolean isStatusConfiguration(final byte bitMask) {
+            return (data[0] & bitMask) == bitMask;
+        }
+
         public double getTemperature() {
-            return (data[2] | (data[1] & 0xFF)) / 256.0; // converts integer to a double data[2] carries the sign
+            if (isStatusConfiguration(StatusConfiguration.TB)) {
+                throw new RuntimeException("Temperature conversion not completed yet!");
+            }
+            return data[2] + (data[1] & 0xFF) / 256.0; // converts integer to a double data[2] carries the sign data[1] stores the fraction.
         }
 
         public double getVoltage() {
-            return ((((data[4] & 0xFF) << 8) | (data[3] & 0xFF))) / 100.0; // unsigned
+            if (isStatusConfiguration(StatusConfiguration.ADB)) {
+                throw new RuntimeException("Voltage conversion not completed yet!");
+            }
+            return ((((data[4] & 0xFF) << 8) | (data[3] & 0xFF))) / 100.0; // unsigned 1 bit = 10mV
         }
 
         public double getCurrent(double valueSensResistor) {
+            // 1 bit = 0.2441mV
             return (((data[6] << 8) | (data[5] & 0xFF))) / (4096 * valueSensResistor); // data[6] carries the sign
         }
 
@@ -106,7 +117,7 @@ public void setStatusConfiguration(byte value) {
         }
 
         public boolean isVDD() {
-            return (data[0] & OneWireDevice26.StatusConfiguration.AD) == OneWireDevice26.StatusConfiguration.AD;
+            return isStatusConfiguration(OneWireDevice26.StatusConfiguration.AD);
         }
 
         public void setVDD(boolean value) {
@@ -116,6 +127,19 @@ public void setVDD(boolean value) {
                 data[0] &= ~OneWireDevice26.StatusConfiguration.AD;
             }
         }
+
+        /**
+         * Clean the read only data
+         */
+        public void clearRO() {
+            data[0] &= 0x0F;
+            data[1] = 0;
+            data[2] = 0;
+            data[3] = 0;
+            data[4] = 0;
+            data[5] = 0;
+            data[6] = 0;
+        }
     }
 
     public static class ScratchpadPage1Data extends ScratchpadPageXData {
diff --git a/de.ibapl.onewire4j/src/main/java/de/ibapl/onewire4j/devices/DS2438WithHIH4031.java b/de.ibapl.onewire4j/src/main/java/de/ibapl/onewire4j/devices/DS2438WithHIH4031.java
index 75f1ceb..8a298af 100644
--- a/de.ibapl.onewire4j/src/main/java/de/ibapl/onewire4j/devices/DS2438WithHIH4031.java
+++ b/de.ibapl.onewire4j/src/main/java/de/ibapl/onewire4j/devices/DS2438WithHIH4031.java
@@ -31,6 +31,12 @@
  */
 public class DS2438WithHIH4031 {
 
+    @FunctionalInterface
+    public interface HumidityTemperatureSink {
+
+        void data(final double humidity, final double temp);
+    }
+
     final OneWireDevice26 ds2438;
 
     public DS2438WithHIH4031(OneWireDevice26 ds2438) {
@@ -47,29 +53,64 @@ public double getHIH4031Humidity(OneWireAdapter adapter) throws IOException {
         if (data.isVDD()) {
             VDD = data.getVoltage();
             data.setVDD(false);
+            data.clearRO();
             ds2438.setScratchpadPage0(adapter, data);
             data = ds2438.getScratchpadPage0(adapter, false, true);
             VAD = data.getVoltage();
         } else {
             VAD = data.getVoltage();
             data.setVDD(true);
+            data.clearRO();
             ds2438.setScratchpadPage0(adapter, data);
             data = ds2438.getScratchpadPage0(adapter, false, true);
             VDD = data.getVoltage();
-
         }
+
         final double result = (((VAD / VDD) - 0.16) / 0.0062) / (1.0546 - 0.00216 * T);
         if (result > 100.0) {
-            throw new RuntimeException("humidity can't be > 100.0% : " + result + "(VAD = " + VAD + " VDD = " + VDD + ")");
+            throw new RuntimeException("@" + ds2438.getAddressAsString() + ": humidity can't be > 100.0% : " + result + "(VAD = " + VAD + " VDD = " + VDD + " T = " + T + " )");
         } else if (result < 0.0) {
-            throw new RuntimeException("humidity can't be < 0.0% : " + result + "(VAD = " + VAD + " VDD = " + VDD + ")");
+            throw new RuntimeException("@" + ds2438.getAddressAsString() + ": humidity can't be < 0.0% : " + result + "(VAD = " + VAD + " VDD = " + VDD + " T = " + T + ")");
         } else {
             return result;
         }
     }
 
+    public void getHIH4031HumidityAndTemperature(OneWireAdapter adapter, HumidityTemperatureSink sink) throws IOException {
+        final double VDD;
+        final double VAD;
+        final double temp;
+
+        OneWireDevice26.ScratchpadPage0Data data = ds2438.getScratchpadPage0(adapter, true, true);
+        temp = data.getTemperature();
+        if (data.isVDD()) {
+            VDD = data.getVoltage();
+            data.setVDD(false);
+            data.clearRO();
+            ds2438.setScratchpadPage0(adapter, data);
+            data = ds2438.getScratchpadPage0(adapter, false, true);
+            VAD = data.getVoltage();
+        } else {
+            VAD = data.getVoltage();
+            data.setVDD(true);
+            data.clearRO();
+            ds2438.setScratchpadPage0(adapter, data);
+            data = ds2438.getScratchpadPage0(adapter, false, true);
+            VDD = data.getVoltage();
+        }
+
+        final double humidity = (((VAD / VDD) - 0.16) / 0.0062) / (1.0546 - 0.00216 * temp);
+        if (humidity > 100.0) {
+            throw new RuntimeException("@" + ds2438.getAddressAsString() + ": humidity can't be > 100.0% : " + humidity + "(VAD = " + VAD + " VDD = " + VDD + " T = " + temp + " )");
+        } else if (humidity < 0.0) {
+            throw new RuntimeException("@" + ds2438.getAddressAsString() + ": humidity can't be < 0.0% : " + humidity + "(VAD = " + VAD + " VDD = " + VDD + " T = " + temp + ")");
+        } else {
+            sink.data(humidity, temp);
+        }
+    }
+
     public double getTemperature(OneWireAdapter adapter) throws IOException {
-        OneWireDevice26.ScratchpadPage0Data page0 = ds2438.getScratchpadPage0(adapter, true, true);
+        OneWireDevice26.ScratchpadPage0Data page0 = ds2438.getScratchpadPage0(adapter, true, false);
         return page0.getTemperature();
     }