Not working with MySensors

[nieMateusz]

This library doesn't work with MySensor lib,
main.cpp.o (symbol from plugin): In function atexit':
(.text+0x0): multiple definition of main'

Example code
`#define MY_GATEWAY_SERIAL

#include <SPI.h>
#include <MySensors.h>
#include <Bounce2.h>
#include <dimmable_light.h>
#include <Wire.h>
#include <PCF8574.h>

const int SYNC_PIN = 2;
const int AC_PIN = 3;

DimmableLight light(AC_PIN);

int brightness = 0;
int fadeAmount = 5;

byte dim1 = 0;

const int period = 1000;

void setup() {
Serial.println();
Serial.println("Dimmable Light for Arduino: second example");
Serial.println();

Serial.begin(115200);
DimmableLight::setSyncPin(SYNC_PIN);
DimmableLight::begin();
}

void loop() {
for (brightness = 0; brightness <= 100; brightness += fadeAmount) {
dim1 = (int)(brightness / 100. * 255);
Serial.println(dim1);
light.setBrightness(dim1);
delay(period);
}

// Rozjasnianie
for (brightness = 100; brightness >= 0; brightness -= fadeAmount) {
dim1 = (int)(brightness / 100. * 255);
Serial.println(dim1);
light.setBrightness(dim1);
delay(period);
}
}
`

• Library version: everyone
• Arduino core: 1.8.3
• Enviroment/IDE: Arduino IDE
• Dimmer board:
• Board: nano