Hi, I want to start a second counter when a pin is high and stop the counter when the pin is low. Is this possible to do with millis() function?
Hello hareendra
Take a view into the BlinkWithOutDelay example provided by the IDE to gain the knowledge.
Have a nice day and enjoy coding in C++.
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When do you want to stop the counter - when the pin goes HIGH?
Yes, it is possible.
when the pin goes LOW and then reset it
Hi paul, thankyou so much ill look into that. thanks!
Hi, I did a bit of research but couldn't find a proper solution. Do you know how this could be done?
so basically I need to count how many seconds a pin was HIGH for.
Read & save milllis() in a variable when it goes high.
Read & save again in another variable when it goes low.
Subtract.
...You may need another "flag" variable like "TimerRrunning" with an if statement.
If the Arduino runs continuously for 40-something days millis() will roll-over and subtraction could give a negative value so you'll have to deal with that.
ohh yes, got it. thankyou will do. previously I was trying with nodemcu built-in functions tmr.create, but didn't work properly. should have thought a bit simpler.
It seem to be a typical xy-problem again
You can use pulseIn() function.
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Hi Golam, thankyou so much so the reply! Yes, I will check on this as well.
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