UART Test program for ESP32 expansion board

Uses ESP32 hardware serial UARTs with pins of Arduino HAT board

Control/src/main.cpp

@@ -1,9 +1,33 @@
 #include <Arduino.h>
-#define LED_BUILTIN 2
+#include <string>
+
+#define RX1pin 14 // Pin 10 on expansion board
+#define TX1pin  4 // Pin 11 on expansion board
+#define RX2pin 15 // Pin 12 on expansion board
+#define TX2pin  2 // Pin 13 on expansion board
+
+void forwardprint();
+
+int counter;
+String input1, input2;
 
 void setup() {
-	Serial.begin(115200);
+	Serial.begin(115200); // Set up hardware UART 0 (Connected to USB port)
+	Serial1.begin(9600, SERIAL_8N1, RX1pin, TX1pin); // Set up hardware UART 1
+	Serial2.begin(9600, SERIAL_8N1, RX2pin, TX2pin); // Set up hardware UART 2
 }
 
 void loop() {
+	forwardprint();
+	if(Serial.available()){
+		input1 = String(Serial.readStringUntil('\n'));
+		Serial1.println(input1);
+	}
+}
+
+void forwardprint() {
+	if(Serial2.available()){
+		input2 = String(Serial2.readStringUntil('\n'));
+		Serial.println(input2);
+	}
 }