//Arduino
int led = 11;
String x;
int val;
void setup(){
Serial.begin(9600);
pinMode(led, OUTPUT);
}
void loop(){
if(Serial.available()>0)
{
x=Serial.readStringUntil(',');
val=x.toInt();
analogWrite(led, val);
}
}
//C#
using System;
using System.Collections.Generic...