Using push button to go to next void function

Projects Programming
1

Hi all!
I'd like to get some help with my Arduino programing.(im using arduino mini pro)
I'd like to make arduino go to my next function when a button pressed.
i have 3 function in my code for room temperature sensors.

  • void temp1() //temperature sensor 1
  • void temp2() //temperature sensor 2
  • void temp3() //temperature sensor 3

i'm using only one button connected to the Analoginput(A1) and the other go directly to the ground. so when i start the arduino it will go to void temp1(), and when i pressed the button it will go to void temp2() and when i pressed it again it will go to void temp3() and so on if i pressed it again it will go to void temp1() again

Can anybody help me how to make the code go to next function ?
Thanks a lot!

2

Look at the StateChangeDetection example in the IDE to see how to detect when a button becomes pressed. Use that to increment a counter and run your functions based on the counter value.

3

Post your program between [code] and [/code] tags, like this:

[code]
 your
  code
   here
[/code]
4

you can use if like this,or else you can use switch case

int a=A1;
int count =1;
if (a==HIGH)
{
if (count==1)
{
voidtemp1()

}
if(counnt==2)
{
voidtemp2()

}
if(count==3)
{
voidtemp3()
count=1;
}
}

5

if loop

There is no such thing as an if loop

6

You could use a library for the debouncing and state change detection.

I like to use GitHub - thomasfredericks/Bounce2: Debouncing library for Arduino and Wiring.

7

Whatever solution is adopted, unless the functions take little time to run then moving to the next one after a button press may be more of a problem than it appears as first.

BlinkWithoutDelay here we come

8

I can give you an example using the mentioned library

#include <Bounce2.h>

Bounce button;

void setup() {
  Serial.begin(250000);
  button.attach(A1, INPUT_PULLUP);
}

void loop() {
  static byte selectFunction = 1;
  static unsigned long lastAction;
  unsigned long topLoop = millis();

  if (button.update()) {
    if (button.fell()) {
      if (++selectFunction >= 4) {
        selectFunction = 1;
      }
      lastAction = 0;  // this starts the selected function directly
      switch (selectFunction) {
        case 1:
          Serial.println(F("select temp1"));
          break;
        case 2:
          Serial.println(F("select temp2"));
          break;
        case 3:
          Serial.println(F("select temp3"));
          break;
      }
    }
  }
  if (topLoop - lastAction >= 1000) {
    lastAction = topLoop;
    switch (selectFunction) {
      case 1:
        Serial.println(F("execute temp1"));
        break;
      case 2:
        Serial.println(F("execute temp2"));
        break;
      case 3:
        Serial.println(F("execute temp3"));
        break;
    }
  }
}
9

All very well, but what if case 1 was

  case 1:
    for (int x = 0; x < 255; x++)
    {
      //do something using the value of x
      delay(100);
    }
  break;

Let's see what the OP wants to do in the functions.

10

Whandall:
I can give you an example using the mentioned library

#include <Bounce2.h>

Bounce button;

void setup() {
 Serial.begin(250000);
 button.attach(A1, INPUT_PULLUP);
}

void loop() {
 static byte selectFunction = 1;
 static unsigned long lastAction;
 unsigned long topLoop = millis();

if (button.update()) {
   if (button.fell()) {
     if (++selectFunction >= 4) {
       selectFunction = 1;
     }
     lastAction = 0;  // this starts the selected function directly
     switch (selectFunction) {
       case 1:
         Serial.println(F("select temp1"));
         break;
       case 2:
         Serial.println(F("select temp2"));
         break;
       case 3:
         Serial.println(F("select temp3"));
         break;
     }
   }
 }
 if (topLoop - lastAction >= 1000) {
   lastAction = topLoop;
   switch (selectFunction) {
     case 1:
       Serial.println(F("execute temp1"));
       break;
     case 2:
       Serial.println(F("execute temp2"));
       break;
     case 3:
       Serial.println(F("execute temp3"));
       break;
   }
 }
}

UKHeliBob:
All very well, but what if case 1 was

  case 1:

for (int x = 0; x < 255; x++)
   {
     //do something using the value of x
     delay(100);
   }
 break;




Let's see what the OP wants to do in the functions.

hey thanks for the response guys !
i will try using the bounce2 library first. I will let you know if there is any progress in my code.

oh, and one another question about the push button.
i connected the push button to the ground(GND) and to analoginput1(A1) am i doing it right ?
because when i do a research in google i found out that some people using a 10k resistor for their button

here is my code for the temperature

#include <U8glib.h>
#include <OneWire.h>
#include <DallasTemperature.h>
OneWire bus(2);
DallasTemperature sensors(&bus);
U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_DEV_0|U8G_I2C_OPT_NO_ACK|U8G_I2C_OPT_FAST);

float temperature;
char temperatureString[6] = "-";

void draw(void) {
  u8g.setFont(u8g_font_helvB14);
  u8g.drawStr( 0, 15, "Engine:");
  u8g.setFont(u8g_font_fur35n);
  u8g.drawStr( 0, 60, temperatureString);
  u8g.setFont(u8g_font_helvB14);
  u8g.drawStr(95, 60, "\260C");
}

void setup() {
  sensors.begin();
}

void loop() {
  u8g.firstPage();  
  do {
    draw();
  } while( u8g.nextPage() );

  //read temperature
  sensors.requestTemperatures();
  temperature = sensors.getTempCByIndex(0);
  dtostrf(temperature, 2, 0, temperatureString);
  
  delay(1000);
}
11

here is my code for the temperature

  delay(1000);
12

Thats only to moderate output.

My example had the 'once a second' part builtin.