Switched to Native USB Port

firmware/pid_playground/pid_playground.ino

@@ -76,7 +76,8 @@ char printBuf[256];
 
 
 void setup() {
-  Serial.begin(9600);
+  SerialUSB.begin(9600);
+  //Serial.begin(9600);
   //Serial.begin(460800);
   //Serial.begin(128000);
   Ltc6992::init();
@@ -208,7 +209,8 @@ void loop() {
     printRq = false;
     /*Format: T_loop T_ool_1 T_ool_2 T_ool_3 PID P I D*/
     sprintf(printBuf, "Tloop:%f,Tool1:%f,Tool2:%f,Tool3:%f,Tool4:%f,PID:%f,P:%f,I:%f,D:%f\n", data_to_temperature(adc1_data), adc2_temps[0], adc2_temps[1], adc2_temps[2], adc2_temps[3], pid_output, pid_arr[0], pid_arr[1], pid_arr[2]);
-    Serial.print(printBuf);
+    SerialUSB.print(printBuf);
+    //Serial.print(printBuf);
   }
   
 }