Fixed wrong shunt voltage reading

lib/INA233/INA233.h

@@ -7,6 +7,7 @@
 #define REGISTER_READ_VIN 0x88
 #define REGISTER_READ_VSHUNT 0xD1
 #define REGISTER_CONFIGURATION 0xD0
+#define REGISTER_READ_IIN 0x89
 
 enum AveragingMode {
   averages_1 = B000,
@@ -32,7 +33,7 @@ enum ConversionTime {
 
 class INA233{
  public:
-     String print_device_number();
+     String get_device_model();
      INA233(uint8_t addr, TwoWire* wire = &Wire);
      bool begin(const uint8_t sda, const uint8_t scl);
 
@@ -46,6 +47,8 @@ class INA233{
 
      uint16_t getConfigRegister();
 
+     void reset();
+
      bool isConnected(void);
 
  private: