pulseIn Timeout = 69% of What You Specify

[wingsy]

 
  digitalWrite(LED_BUILTIN, HIGH);
  ET = micros();
  t1 = pulseIn(inPulse, LOW,1000000);
  t2 = micros()-ET;
  Serial.print(t1);
  Serial.print("  ");
  Serial.println(t2);
  digitalWrite(LED_BUILTIN, LOW);
  delay(2000);

Monitor:
0 691612
0 691612
0 691604
etc.

Whatever I specify for the pulseIn timeout is set to 69% of that. Using Uno. Just me or do you see this too?

(Sorry - left this out:

unsigned long ET = micros();  //
unsigned long t1;         //
unsigned long t2;
const long outPulse = 8;
const long inPulse = 7;


void setup() {
  Serial.begin(115200);
  pinMode(inPulse, INPUT_PULLUP);
  pinMode(outPulse,OUTPUT);
  pinMode(LED_BUILTIN, OUTPUT);

}

void loop() {

[blh64]

Since it is only a snippet of code and not a complete sketch, nobody can see what you see since nobody can compile the code and test it.
Also,what is connected to inPulse?

[wingsy]

Posted the rest of the code while you were typing. Nothing connected to inPulse, configured with pullup.

[blh64]

You do get that behavior in simulation as well: relays - Wokwi ESP32, STM32, Arduino Simulator

If you look at the documentation, it does say this: "The timing of this function has been determined empirically and will probably show errors in longer pulses." so it doesn't sound too exact.

[JohnLincoln]

Try using pulseInLong() instead of pulseIn().

[wingsy]

@JohnLincoln

Try using [pulseInLong()]

That did the trick. Thanks John.