Worked on firmware

lib/scale/MockScale.h

@@ -0,0 +1,32 @@
+#include <cstdint>
+
+
+class MockScale
+{
+public:
+    MockScale( uint16_t valueMin=0, uint16_t valueMax=50)
+        : valueMin_(valueMin), valueMax_(valueMax), currentValue_(valueMin), direction(1)
+    {}
+
+    bool measure(uint16_t & measurementOut) {
+        currentValue_ += direction;
+        if ( currentValue_ >= valueMax_)
+            direction = -1;
+        else if ( currentValue_ <= valueMin_ )
+            direction = +1;
+
+        measurementOut = currentValue_;
+        return true;
+    }
+
+    void begin(uint32_t , uint32_t ) {
+    };
+
+    void tare(uint32_t ) {
+    }
+private:
+    uint16_t valueMin_;
+    uint16_t valueMax_;
+    uint16_t currentValue_;
+    int direction;
+};

lib/scale/Scale.h

@@ -0,0 +1,30 @@
+#include "HX711.h"
+#include <cstdint>
+
+
+template<int DIVIDER=128>
+class Scale
+{
+public:
+    bool measure(uint16_t & measurementOut) {
+        if (hx711_.is_ready())
+        {
+            uint32_t value = hx711_.get_value(MEASUREMENT_AVG_COUNT);
+            measurementOut = (int16_t)(value / DIVIDER);
+            return true;
+        }
+        else
+            return false;
+    }
+
+    void begin(uint32_t pinDOUT, uint32_t pinSCK) {
+        hx711_.begin(pinDOUT, pinSCK);
+    };
+
+    void tare(uint32_t numMeasurementsToAverage=50) {
+        hx711_.tare(numMeasurementsToAverage);
+    }
+
+private:
+    HX711 hx711_;
+};