Fix error ESP8266 and ESP32

Author: hafidhh

examples/YF-S201/Read_Flow_Rate/Read_Flow_Rate.ino

@@ -19,6 +19,13 @@
 FlowSensor Sensor(YFS201, D2);
 int timebefore = 0;
 
+// Uncomment if use ESP8266 and ESP32
+// void IRAM_ATTR count()
+// {
+//   Sensor.count();
+// }
+
+// Comment if use ESP8266 and ESP32
 void count()
 {
   Sensor.count();

examples/YF-S201/Read_Flow_Rate_and_Volume/Read_Flow_Rate_and_Volume.ino

@@ -19,6 +19,13 @@
 FlowSensor Sensor(YFS201, D2);
 int timebefore = 0;
 
+// Uncomment if use ESP8266 and ESP32
+// void IRAM_ATTR count()
+// {
+//   Sensor.count();
+// }
+
+// Comment if use ESP8266 and ESP32
 void count()
 {
   Sensor.count();

examples/YF-S201/Read_Volume/Read_Volume.ino

@@ -19,6 +19,13 @@
 FlowSensor Sensor(YFS201, D2);
 int timebefore = 0;
 
+// Uncomment if use ESP8266 and ESP32
+// void IRAM_ATTR count()
+// {
+//   Sensor.count();
+// }
+
+// Comment if use ESP8266 and ESP32
 void count()
 {
   Sensor.count();

src/FlowSensor.cpp

@@ -74,7 +74,7 @@ void FlowSensor::count()
 void FlowSensor::begin(void (*userFunc)(void))
 {
   pinMode(this->_pin, INPUT);
-  digitalWrite(this->_pin, HIGH); // Optional Internal Pull-Up
+  digitalWrite(this->_pin, INPUT_PULLUP); // Optional Internal Pull-Up
   attachInterrupt(this->_pin, userFunc, RISING);
 }