How can I do this? Millis and conditions

Projects General Guidance
1

Hello Arduino comunity, so im doing a code and I need the code do this:
Count 1 minute with millis
After count that minute, check a sensor
If sensor is minor than X value start another counter and inside that counter condition (because is millis) read a sensor and turn ON a rele until the sensor reach a value greater than X, after that restart the first counter and again again again.

I dont want the code, I just want to know if it is possible and maybe some guidance, thank you comunity

2

Yes, what you propose is possible.

maybe some guidance

Don't used delay() anywhere in loop().

These tutorials will be helpful

Doing several things at the same time
http://forum.arduino.cc/index.php?topic=223286.0

3

The basic idea is demonstrated by the Blink Without Delay example, and tutorial.

1 Like
4

So what happens when the minute timeout happens and the sensor is >= X? Wait another minute before checking? Or keep looking at it constantly until it's < X?

Edit: assuming the latter case:

setup:
make relay inactive
start 1 minute sensor timer

loop:
if relay is inactive and sensor timer has expired
  if sensor input < X
    make relay active
  end if
end if
if relay is active and sensor input >= X
  restart 1 minute sensor time
  make relay inactive
fi

If you only want the sensor checked for < X every minute, simply restart the sensor timer as the first step in the first outer if, just like in the second outer if.

5

Yes.

Read analog sensor https://docs.arduino.cc/language-reference/en/functions/analog-io/analogRead/

Less than https://docs.arduino.cc/language-reference/en/structure/comparison-operators/lessThan

Greater than https://docs.arduino.cc/language-reference/en/structure/comparison-operators/greaterThan/

Counters How to Make a Counter in Arduino | Delft Stack

6

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