Description
Many a times there are resource constraints and it is required to have fewer buttons, but these buttons should have multiple functions, so to solve this problem I built a logic which uses a single button to perform multiple functions, for e.g. In this example we used the button to move through various modes sequentially. This is implemented in Arduino ide and is tested on Arduino UNO but it should work fine on most of the Arduino boards, with little tweaks it should work with other microcontrollers as well. You can find my code below:
//Using a single button to move through various modes sequentially in arduino
const PROGMEM int Mode1Select = 2; //Button to increment the mode
int ChPushCounter = 0; // counter for the number of button presses
int ChIncState = 0; // current state of the button
int lastChIncState = 1; // previous state of the button
void setup() {
pinMode(Mode1Select, INPUT_PULLUP);
Serial.begin(9600);
}
void loop() {
ChannelSelectFunction();
}
//^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^Channel Select Function
void ChannelSelectFunction() {
ChIncState = digitalRead(Mode1Select);
// compare the buttonState to its previous state
if (ChIncState != lastChIncState) {
// if the state has changed, increment the counter
if (ChIncState == LOW && ChPushCounter <= 3) {
// if the current state is HIGH then the button went from off to on:
ChPushCounter++;
}
else if (ChIncState == LOW && ChPushCounter == 4) {
// if the current state is HIGH then the button went from off to on:
ChPushCounter = 1;
}
// save the current state as the last state, for next time through the loop
lastChIncState = ChIncState;
if (ChPushCounter == 1 && ChIncState == LOW) {
Serial.println("Mode increment 1");
delay(100);
}
else if (ChPushCounter == 2 && ChIncState == LOW) {
Serial.println("Mode increment 2");
delay(100);
}
else if (ChPushCounter == 3 && ChIncState == LOW) {
Serial.println("Mode increment 3");
delay(100);
}
else if (ChPushCounter == 4 && ChIncState == LOW) {
Serial.println("Mode increment 4");
delay(100);
}
}
}
Please do share if you have any interesting ideas to modify the code and the applications where you used this.Thank you😉Adityapratap Singh