Hi,
I try to use ESP32-C3 with the " Expansion Board Base for XIAO".
The buzzer, and the screen work but the button D1 doesn’t.
I try to use the button of the expansion.
I try to set the XIAO directly on a bread board with a physical pullup resistance and with internal pullup resistance. I try other PIN. Input buttons never works.
The code with the expansion board :
#include <Arduino.h>
#include <U8x8lib.h>
#include <Wire.h>
//U8X8_SSD1306_128X64_NONAME_HW_I2C u8x8(/* clock=/ PIN_WIRE_SCL, / data=/ PIN_WIRE_SDA, / reset=/ U8X8_PIN_NONE); // OLEDs without Reset of the Display
U8X8_SSD1306_128X64_NONAME_HW_I2C u8x8(/ reset=*/ U8X8_PIN_NONE);
const int BUTTON_PIN = 0;
void setup(void) {
u8x8.begin();
u8x8.setFlipMode(1); // set number from 1 to 3, the screen word will rotary 180
u8x8.setFont(u8x8_font_chroma48medium8_r);
u8x8.setCursor(0, 0);
u8x8.print(“Hello World4”);
// initialize the pushbutton pin as an input:
pinMode(BUTTON_PIN, INPUT_PULLUP);
}
int nb=0;
int buttonState2 = 0;
void loop(void) {
u8x8.setCursor(0, 0);
u8x8.print(“Hello World”);
u8x8.setCursor(10,0);
u8x8.print(nb);
nb++;
buttonState2 = digitalRead(BUTTON_PIN);
// check if the pushbutton is pressed. If it is, the buttonState is HIGH:
if (buttonState2 == HIGH) {
u8x8.setCursor(0, 3);
u8x8.print("HIGH ");
}else
{
u8x8.setCursor(0, 3);
u8x8.print("LOW ");
}
}
Hi there, Delphine and welcome,
Have a LQQK at this post and how to use the button.
HTH
GL 
PJ
Hi,
I try with interupt as in your exemple (I just take the buttons parts), but it doesn’t work too.
#include <Arduino.h>
#include <U8x8lib.h>
#include <Wire.h>
U8X8_SSD1306_128X64_NONAME_HW_I2C u8x8( U8X8_PIN_NONE);
const int buttonPin = 1; // the number of the pushbutton pin
int buttonState = 0;// variable for reading the pushbutton status
uint8_t binterruptCount = 0; // Amount of received interrupts
void setup() {
pinMode(buttonPin, INPUT_PULLUP);// initialize the pushbutton pin as an input:
attachInterrupt(digitalPinToInterrupt(buttonPin), myISR_Falling, FALLING);
attachInterrupt(digitalPinToInterrupt(buttonPin), myISR_Rising, RISING);
u8x8.begin();
u8x8.setFlipMode(1);
u8x8.setFont(u8x8_font_chroma48medium8_r);
u8x8.clearDisplay();
u8x8.setCursor(0, 0);
u8x8.print("setup");
}
void loop()
{
u8x8.setCursor(0, 0);
u8x8.print("loop");
u8x8.setCursor(1, 1);
if(buttonState == LOW)
{
u8x8.print("LOW");
}else
{
u8x8.print("HIGH");
}
}
void myISR_Falling() { // Pressed Button Interrupt //
binterruptCount++;
buttonState = LOW;
}
void myISR_Rising() { // Pressed Button Interrupt //
binterruptCount++;
buttonState = HIGH;
}
Do you have an idea ?
Hi there,
Yes that won’t work. Your not using the interrupt count, you want the state.
like this; also no debouncing…?
#include <Arduino.h>
#include <U8x8lib.h>
#include <Wire.h>
U8X8_SSD1306_128X64_NONAME_HW_I2C u8x8(/* clock=*/PIN_WIRE_SCL, /* data=*/PIN_WIRE_SDA, /* reset=*/U8X8_PIN_NONE); // OLEDs without Reset of the Display
const int buttonPin = 1; // the number of the pushbutton pin
int buttonState = 0;// variable for reading the pushbutton status
uint8_t binterruptCount = 0; // Amount of received interrupts
void setup() {
Serial.begin(9600);
while (!Serial);
delay(3000);//relax...Get Ready for serial port
Serial.println();
Serial.println("Power ON \n "); // Let's BEGIN!!
Serial.println("Test program compiled on " __DATE__ " at " __TIME__);
Serial.println();
Serial.println("Processor came out of reset.");
u8x8.begin();
u8x8.setFlipMode(1); // set number from 1 to 3, the screen word will rotary 180
u8x8.setFont(u8x8_font_8x13B_1x2_r);
u8x8.clearDisplay();
u8x8.setCursor(0, 0);
u8x8.print("Power ON ");
delay(2000);
pinMode(buttonPin, INPUT_PULLUP);// initialize the pushbutton pin as an input:
attachInterrupt(digitalPinToInterrupt(buttonPin), myISR_Falling, FALLING);
//attachInterrupt(digitalPinToInterrupt(buttonPin), myISR_Rising, RISING);
buttonState = digitalRead(buttonPin); // read the state of the pushbutton value:
u8x8.clearDisplay();
u8x8.setCursor(0, 0);
u8x8.print("setup");
}
//buttonState = digitalRead(buttonPin); // read the state of the pushbutton value:
void loop()
{
u8x8.setCursor(0, 0);
u8x8.print(" Loop ");
u8x8.setCursor(1, 3);
if(buttonState == LOW)
{
u8x8.clearLine(3);
u8x8.print("LOW");
Serial.println("Button Push");
}else
{
u8x8.clearLine(3);
u8x8.print("HIGH");
buttonState = HIGH;
//Serial.println("Button Release"); // Turn on Released prompt
}
delay (500);
buttonState = digitalRead(buttonPin); // read the state of the pushbutton value:
}
void myISR_Falling() { // Pressed Button Interrupt //
binterruptCount++;
buttonState = LOW;
}
void myISR_Rising() { // Pressed Button Interrupt //
binterruptCount++;
buttonState = HIGH;
}
should get this when powered up and push the button.
Power ON
Test program compiled on Nov 3 2023 at 20:45:46
Processor came out of reset.
Button Push
Button Push
Button Push
HTH
GL PJ
Hi,
Thanks for the code. I set your code, push the button many time and I get this
Power ON
Test program compiled on Nov 4 2023 at 13:15:03
Processor came out of reset.
On the screen, I read POWER ON then Loop and HIGH. It never change.
I must make one change , I replace
U8X8_SSD1306_128X64_NONAME_HW_I2C u8x8(/* clock=*/PIN_WIRE_SCL, /* data=*/PIN_WIRE_SDA, /* reset=*/U8X8_PIN_NONE); // OLEDs without Reset of the Display
by
U8X8_SSD1306_128X64_NONAME_HW_I2C u8x8(U8X8_PIN_NONE);
Because first line don’t compile (PIN_WIRE_SCL is not recognize) , and I see this solution on a forum.
Do you think the issue can come from a library ?
I use seeduino and arduino from years but it is my first time with an esp32. There is somthing special to do to have the entry ?
Thanks for your help !
It’s finaly works !
I have set the buttonPin to the GPIO number (3) insted of the Digital input (1).
But I don’t know why, the buzzer is on Digitial 3 /GPIO 5. And it works when I set “int speakerPin = A3;”.
Thanks for your help PJ_Glasso !
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