float kp = 3; //Mine was 8
          float ki = 0.6; //Mine was 0.2
          float kd = 0.2; //Mine was 3100

          time = millis();
          temp_error = setpoint - tempC;
          PID_p = kp * temp_error;
          float temp_diference = temp_error - temp_previous_error;
          //Serial.println("---------------");
          //Serial.print("Temp: ");
          //Serial.println(tempC);
          //Serial.print("error: ");
          //Serial.println(temp_error);
          //Serial.print("PID_p: ");
          //Serial.println(PID_p);
          PID_d = kd * ((temp_error - temp_previous_error) / period);
          //Serial.print("PID_d: ");
          //Serial.println(PID_d);

          if (temp_error < limit) // && temp_error <= limit)
          {
            PID_i = 0;
            //Serial.print("inside error");
          }
          else
          {
            PID_i = PID_i + (ki * temp_error);
            //Serial.print("outside error");
          }
          //Serial.print("PID_i: ");
          //Serial.println(PID_i);


          PID_total = PID_p + PID_i + PID_d;
          //Serial.print("PID_total: ");
          //Serial.println(PID_total);
          //PID_total = map(PID_total, -150, 150, 0, 150);


          if (PID_total >= 3) {
            //Serial.println("Heating");
            row1 = String(String(tempC) + "C HEAT");
            heater(true);
            plot = 1;

          } else {
            //Serial.println("Waiting");
            row1 = String(String(tempC) + "C WAIT");
            heater(false);
            plot = 0;
          }
          Serial.print(tempC);
          Serial.print(" ");
          Serial.print(setpoint);
          Serial.print(" ");
          Serial.print(plot);
          Serial.print(" ");
          Serial.print(setpoint + limit);
          Serial.print(" ");
          Serial.println(setpoint - limit);


          temp_previous_error = temp_error;
}