How get the running duration of the led with blynk

[PeteKnight]

Your requirement doesn’t sound too different from this…

Count door opening + elapsed time opened sum each day

To add-in a counter for the accumulated time in seconds that the door has been open during the day, I’d make these changes as well as those listed above… timer.setInterval(1000L, read_button); // This timer in vopid setup needs to run once per second for the seconds counter to work long int elapsed_time_secs; void read_button() { bool currentState = digitalRead(BUTTON_PIN); if (currentState) { // we get here if the door is open elapsed_time_secs ++; // add 1 to the total numbe…

Pete.