ESP8266 Community Forum

- Sat Feb 10, 2018 6:39 pm #73862 Hi,

I am trying to get data from a Giger sensor (https://www.aliexpress.com/item/Good-Qu ... 54504.html) to a NodeMCU ESP8266 board (https://www.amazon.com/HiLetgo-Internet ... 010N1SPRK/).
I am using Arduino to program the ESP.

The sensor generates low pulse interrupt of 200micro seconds and the processor has to count no. of interrupt in a minute.

The interrupt is not triggering in the ESP however it does trigger in an Arduino Uno. I have tested the code and it does work when I manually cause the interrupt.

Code: Select allconst byte interruptPin = D1;
volatile unsigned int interruptCounter = 0;
 
void setup() {
 
  Serial.begin(115200);
  pinMode(interruptPin, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(interruptPin), handleInterrupt, FALLING);
 
}
 
void handleInterrupt() {
  ++interruptCounter;
}
 
void loop() {
  unsigned long init_time = millis();
  Serial.println("Counting");
  while(millis()-init_time <= 15000){
    delay(1000);
    Serial.print('.');
  }
  Serial.print("Count/min is:");
  Serial.println((unsigned int)(interruptCounter<<2));
 
  interruptCounter = 0;
}