error compiling for board arduino leonardo

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1

hello everyone

i really want to make a capacitive sensor keypad like the one SquashyBoy made in his video.

but, because i'm literally a newbie on programming arduino, i don't know what to do to fix this error

the error:

C:\Users\zakit\AppData\Local\Temp\ccLCueWf.ltrans0.ltrans.o: In function `CapacitiveKey::keyUpdate(bool)':

C:\Users\zakit\AppData\Local\Temp\arduino_build_148351\sketch/capacitiveKey.h:23: undefined reference to `CapacitiveSensor::capacitiveSensorRaw(unsigned char)'

C:\Users\zakit\AppData\Local\Temp\ccLCueWf.ltrans0.ltrans.o: In function `global constructors keyed to 65535_0_KappaPad.ino.cpp.o.2177':

:(.text.startup+0x136): undefined reference to `CapacitiveSensor::CapacitiveSensor(unsigned char, unsigned char)'

:(.text.startup+0x17c): undefined reference to `CapacitiveSensor::CapacitiveSensor(unsigned char, unsigned char)'

collect2.exe: error: ld returned 1 exit status

Using library Keyboard at version 1.0.2 in folder: C:\Program Files (x86)\Arduino\libraries\Keyboard

Using library HID at version 1.0 in folder: C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\HID

exit status 1

Error compiling for board Arduino Leonardo.

2

Please post your full code. Before doing so, please read How to use this forum - please read. - Installation & Troubleshooting - Arduino Forum and pay special attention to point #7 about posting code using code tags.

Please post a link to the CapacitiveSensor library that you're using.

3

Most probably your CapacitiveSensor library (which exactly?) does not support the Leonardo.

Find a different library that is applicable to the Leonardo.

4

It looks like all of the errors are in the linker... the stage of the build where the various compiled binary files are linked together into a program. I suspect that one ort more source files are missing from the CapacitiveSensor library. Did you copy a CapacitiveSensor.h without the CapacitiveSensor.cpp file?

5

sterretje:
Please post your full code. Before doing so, please read How to use this forum - please read - Website and Forum - Arduino Forum and pay special attention to point #7 about posting code using code tags.

Please post a link to the CapacitiveSensor library that you're using.

#include "CapacitiveSensor.h"
#include <Keyboard.h>

#include "capacitiveKey.h"

//#define SERIAL_OUTPUT
#define DISABLE_PIN 15

void setup() {
#ifdef SERIAL_OUTPUT
Serial.begin(115200);
#endif
Keyboard.begin();
pinMode(DISABLE_PIN, INPUT_PULLUP);
}

CapacitiveKey key0 = CapacitiveKey(
2, //Capacitive Send Pin
7, //Capacitive Sense Pin
6, //LED Pin
6, //Capacitive Treshold
'z', //Keyboard Key
255 //LED Brightness (0-255)
);
CapacitiveKey key1 = CapacitiveKey(
4, //Capacitive Send Pin
8, //Capacitive Sense Pin
10, //LED Pin
5, //Capacitive Treshold
'x', //Keyboard Key
255 //LED Brightness (0-255)
);

void loop() {
bool keyboardActive = digitalRead(DISABLE_PIN);
key0.keyUpdate(keyboardActive);
key1.keyUpdate(keyboardActive);

#ifdef SERIAL_OUTPUT
Serial.print(key0.sample);
Serial.print(",");
Serial.println(key1.sample);
#endif
}

here is the link: GitHub - fb39ca4/kappa-pad: Initial Commit

6

You did NOT read the link that I gave you :frowning:

You missed an important part in https://github.com/fb39ca4/kappa-pad:

Software

The Arduino Sketch is located in the KappaPad directory of this repository. It requires the CapacitiveSensor library so install that first.