unsigned long fimdaespera, tempoagora, tin, tend;
unsigned long intervaloms=3000;
const float pi = 3.1415;
void setup(){
  pinMode(2, OUTPUT);
   Serial.begin(115200);
}

void loop(){
  unsigned long inter=50;
  int Ampl=2;
  float freq=1;
  double senodei;
  float tempo;
  while (Serial.available() == 0){
    delay(200);
    Serial.println("Aguardando Serial");
  }
  if (Serial.available() > 0){
    tempo = leStringSerial();
  }
   while (Serial.available() == 0){
    delay(200);
    Serial.println("Aguardando Serial 2");
  }
  if (Serial.available() > 0){
    freq = leStringSerial();
  }
  for (int i=0; i<3000;i++){
    tempo = (float)i*((float)inter/1000);
    senodei= Ampl * sin(2*pi*freq*tempo);
    Serial.println(senodei);
    tin = millis();
    tend=tin+inter;
    while(tin<tend){tin=millis();}
  }
}


float leStringSerial(){
  String conteudo = "";
  char caractere;
  while(Serial.available() > 0){
    caractere = Serial.read();
    if (caractere != '\n'){
      conteudo.concat(caractere);
    }
    delay(10);
  }
  return conteudo.toFloat();
}