doesn't sound like you even need max for this.

google "proximity sensor arduino code". Tons of readymade examples.

since i already created a max patch it would be nice to stick to one format. also i can control the colour of the leds in the max patch now. besides that, i do not have lot´s of experience in coding... or is there a possibility to translate the arduino code into max?

any suggestions?

I would echo Wetterberg's suggestion to optimize this in Arduino first. Furthermore, it could be argued that, as programming environments, Max is way more complex where Arduino is more straightforward.

You mention that you like being able to change LED colour; there's tutorials on how to do this quickly and simply on the Arduino site. Maybe you can define the interaction environment parameters a little more precisely for yourself - why, how and when LEDs react to proximity - before muddying the water with reading AND writing to Arduino via Max.

Brendan.

true point, that´s something i still need to consider.

If I had more free time, I could suggest something simple in Arduino, but sadly under pressure at the moment. Search for terms like colour-changer, potentiometer, mood-light, LED, etc.

I'm certainly no coding-ninja, but this should be v simple.

HTH

Brendan

tx again for your advice. i made the effort to code my stuff in arduino and it worked out perfectly! :)