Change modes using 2 toggle switch

Projects General Guidance
1

Hello

I am trying to use a 2 pin toggle switch https://www.amazon.co.uk/dp/B07RQ4ZBQJ?psc=1&ref=ppx_yo2ov_dt_b_product_details to change modes for the programme I am making however i cannot get it to register a change when i flip the switch

const int switchPin = A6;

void setup() {
  Serial.begin(9600);
  pinMode(switchPin, INPUT_PULLUP); // Enable internal pull-up resistor on A6
}

void loop() {
  int switchState = digitalRead(switchPin);
  
  if (switchState == LOW) {
    Serial.println("Switch ON");
  } else {
    Serial.println("Switch OFF");
  }

  delay(100); // Adjust delay as needed
}

This is the code im using to debug it, i have tried connecting the switch to 5v & A6, Gnd & A6 and A6 & Gnd using a 10k resistor but each time it just reads as switch on.

Any help would be greatly appreciated

2

Welcome to the forum

const int switchPin = A6;

Which Arduino board are you using ?

If it is a classic Nano then the A6 cannot be used as a digital input

3

Thanks for the speedy reply!!

ELEGOO Nano Board 340/ATmega Nano328P compatible with offical Nano (pack of 3) https://amzn.eu/d/06e7V3Y6

This is the board I'm using, I assume it's a nano classic?

4

Yes, it's a Nano classic

A5 and A6 A6 and A7 are analogue only on that board. You could change the code to use analogRead() if you really needed to

EDIT - corrected pin numbers. See reply #6

5

Would I still be able to use a toggle switch. If not could I potentially use A7 instead?

Sorry completely new to all this so I really appreciate the help

6

Sorry, I see that I made a mistake in my previous reply

It is pins A6 and A7 that can only be used as analogue inputs

If you change the code a little then you could use analogRead() to detect whether one of those pins is currently HIGH or LOW

HIGH will return a value of close to 1023 and LOW a value close to zero

7

HIGH will return a value way bigger than 512, and LOW a value way smaller.

But why use analog pins at all? Maybe when you are pinched and have run out, just use digital pins and know that most so-called analog pins work perfectly well with digital read and write.

a7

8

The only pins I have spare are A6 and A7. The rest are being used by the programme & hardware

9

So am I right in thinking I connect the toggle switch to A6 and ground and the change the original code switchState = digitalRead(switchPin);

To

switchState = analogRead(switchPin);
10

No. Read the responses. We may have been hinting too quietly:

switchState = analogRead(switchPin) < 512;

would set switchState true if a pulled-up input pin was connected to ground by your switch closed contacts.

a7

11

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