Added Serial 'tests' for Interrupt and stock code

Author: timkoers

libraries/ESP32/examples/Serial/Interrupt/Interrupt.ino

@@ -0,0 +1,19 @@
+HardwareSerial hwSerial(0);
+HardwareSerial hwSerial2(2);
+
+void setup()
+{
+  hwSerial.begin(115200);
+  hwSerial2.begin(115200);
+  hwSerial2.setRXInterrupt(onSerialRX);
+  
+}
+
+void loop()
+{
+  delay(1);
+}
+
+void onSerialRX(char* c){
+  hwSerial.print(c);
+}

libraries/ESP32/examples/Serial/NoInterrupt/NoInterrupt.ino

@@ -0,0 +1,13 @@
+HardwareSerial hwSerial(0);
+HardwareSerial hwSerial2(2);
+
+void setup()
+{
+  hwSerial.begin(115200);
+  hwSerial2.begin(115200);
+}
+
+void loop()
+{
+  hwSerial.print(hwSerial2.read());
+}