DMX strobe speed issue

Hi!

I'm using Arduino to build a custom DMX foot controller for some LED lights. I'm using the Tinkerkit DMX shield with the DMX Simple library and an Elegoo Arduino mega clone.

The lights have a strobe function. When I engage the strobe function using a conventional DMX controller and set the strobe speed to max (255) it's a pretty fast strobe speed like you'd expect.

When I perform the same actions using the Arduino the strobe speed is about half what it is when using the conventional DMX controller.

DMX channels for the lights are:

CH1 Macros (strobe is 201-255)
CH2 Color (255 is all colors)
CH3 Speed

My sketch is below. Any idea why the speed of the strobe would be different when using the Arduino vs. the conventional DMX controller?

The other macros all seem to work as expected.

#include <DmxSimple.h>

void setup() {
pinMode(3,OUTPUT);
digitalWrite(3,HIGH);
DmxSimple.usePin(3);
DmxSimple.maxChannel(3);

DmxSimple.write(1, 210);
DmxSimple.write(2, 255);
DmxSimple.write(3, 255);

}

void loop() {

}