Fix hysterisis when prvVal = 0

Author: tyeth

src/components/analogIO/Wippersnapper_AnalogIO.cpp

@@ -405,22 +405,20 @@ void Wippersnapper_AnalogIO::update() {
         // This should allow a more wifi blip tolerant threshold for the both ends of the range.
         float CURRENT_HYSTERISIS;
         if (pinValRaw < maxDecimalValue / 3) {
-          CURRENT_HYSTERISIS = DEFAULT_HYSTERISIS;
+          CURRENT_HYSTERISIS = maxDecimalValue * DEFAULT_HYSTERISIS;
         } else if (pinValRaw < (maxDecimalValue / 3) * 2) {
-          CURRENT_HYSTERISIS = DEFAULT_HYSTERISIS * 2;
+          CURRENT_HYSTERISIS = maxDecimalValue * DEFAULT_HYSTERISIS * 2;
         } else {
-          CURRENT_HYSTERISIS = DEFAULT_HYSTERISIS * 4;
+          CURRENT_HYSTERISIS = maxDecimalValue * DEFAULT_HYSTERISIS * 4;
         }
 
 
 
         // get the threshold values for previous pin value
         uint16_t _pinValThreshHi =
-            _analog_input_pins[i].prvPinVal +
-            (_analog_input_pins[i].prvPinVal * CURRENT_HYSTERISIS);
+            _analog_input_pins[i].prvPinVal + CURRENT_HYSTERISIS);
         uint16_t _pinValThreshLow =
-            _analog_input_pins[i].prvPinVal -
-            (_analog_input_pins[i].prvPinVal * CURRENT_HYSTERISIS);
+            _analog_input_pins[i].prvPinVal - CURRENT_HYSTERISIS);
 
         if (_analog_input_pins[i].prvPeriod == 0 || pinValRaw > _pinValThreshHi || pinValRaw < _pinValThreshLow) {
           // Perform voltage conversion if we need to