1.0.2

README.md

@@ -24,4 +24,7 @@ Hardware and ADC noise:
 Wires between HX711 and load cell should be twisted and kept as short as possible.
 Most available HX711 modules seems to follow the reference design, but be aware that some modules are poorly designed with under-sized capacitors, and noisy readings.
 The Sparkfun module seems to differ from most other available modules as it has some additional components for noise reduction. 
-
+
+Update 1.0.2:
+- Implemented requested function setTareOffset(long newoffset)
+- Initializing of the index counter in the class declaration: readIndex = 0

library.properties

@@ -1,5 +1,5 @@
 name=HX711_ADC
-version=1.0.1
+version=1.0.2
 author=Olav Kallhovd
 maintainer=Olav Kallhovd
 sentence=Arduino library for the HX711 24-bit ADC for weight scales

src/HX711_ADC.cpp

@@ -207,11 +207,17 @@ void HX711_ADC::powerUp()
 	digitalWrite(sckPin, LOW);
 }
 
+//get the tare offset (raw data value output without the scale "CalFactor")
 long HX711_ADC::getTareOffset() 
 {
 	return tareOffset;
 }
 
+//set new tare offset (raw data value input without the scale "CalFactor")
+void HX711_ADC::setTareOffset(long newoffset)
+{
+	tareOffset = newoffset;
+}
 
 //for testing only:
 //if ready: returns 24 bit data and starts the next conversion, else returns -1

src/HX711_ADC.h

@@ -55,6 +55,7 @@ class HX711_ADC
 		void powerUp(); 
 		bool getTareStatus();						// returns 1 if tareNoDelay() operation is complete
 		long getTareOffset();
+		void setTareOffset(long newoffset);
 		uint8_t update(); 							//if conversion is ready; read out 24 bit data and add to data set
 
 	protected:
@@ -66,7 +67,7 @@ class HX711_ADC
 		float calFactor;
 		long dataSampleSet[DATA_SET + 1]; 			// data set, make voltile if interrupt is used 
 		long tareOffset;
-		int readIndex;
+		int readIndex = 0;
 		long timeStamp;
 		uint8_t isFirst = 1;
 		uint8_t tareTimes;