Programming switches function

[mg073]

I'm building a Arduino based remote box for controlling a Speaker selector volume monitor unit thru rs485

I have a Arduino code for the switches which are designed for Normal(open) and Pushed(close)
But I found some nice EAO switches but unfortunately they are Normal(close) and pushed(open).

Could they Arduino be programmed for that?

Sorry but I'm useless at coding.

[alto777]

@mg073

Could they Arduino be programmed for that?

Yes, easily.

When the switch is read, it will result in HIGH or LOW. One each for the condition of the switch being pressed or not.

Which is pressed and which is not pressed depend on both how the switch is wired, the normal state of the switch and then how the software makes decisions based on that result.

As well, and never too soon to know, if you wanted a momentary pushbutton to act like a press-on press-off switch, this too woukd be a matter of software.

And… if you were stuck with a press- on press-off button, software coukd make that appear as if it were a momentary switch.

a7

[xfpd]

@mg073

Could they Arduino be programmed for that?

Another idea: Change the wiring of the button.

[mg073]

If it was possible it would be a neat fix;)

[mg073]

Thanks, amazing!

So if I get this correct I just invert the status 0 -) 1 and HiGH to LOW etc in the code?

// speaker select:
  if (digitalRead(spk1_button) == LOW && spk1_button_status == 0)  // speaker 1 button is pressed
  {
    spkSelect = 0;                      // set speaker 1
    spk1_button_status = 1;             // set button status
  }
  if (digitalRead(spk1_button) == HIGH && spk1_button_status == 1)
  {
    spk1_button_status = 0;             // reset status
  }

[alto777]

@mg073

So if I get this correct

Yes. Although looking at just the code you posted, the spk1_button_status doesn't need inverting.

Basically you can just apply the fix immediately you read the button.

Also, it is advised to read the button once, and use what you read (stored in a variable) in the rest of the loop. This further localizes the change needed to compensate for a button type or how you wired it.

Just this day I repeated some advice I got some years ago - never mind how long precisely - so read here for a handy trick:

How to add a high/low switch to Brushless motors

I haven't tried your new code yet. And I am inconvenienced just now, so I just found and copied some advices often and recently offered, motivated by your comment to change all HIGH to LOW and so forth. // up top with things like pin numbers and stuff: //... change this if your button is upside down (or is that right side up?) # define PRESST LOW //... later void loop() { bool buttonState = digitalRead(buttonPin) == PRESST; // true if button is pressed There's enough code there to see th…

HTH

a7

[build_1971]

You might need to think about fail safe...