Sync Between Devices.

Homework/Homework4/Bluetooth/Bluetooth.ino

@@ -0,0 +1,38 @@
+#include "SoftwareSerial.h"
+
+const byte rx_connected = 11;
+const byte tx_connected = 10;
+
+SoftwareSerial soft_serial(tx_connected, rx_connected);
+
+void setup() {
+    pinMode(tx_connected, INPUT);
+    pinMode(rx_connected, OUTPUT);
+    Serial.begin(9600);
+    soft_serial.begin(9600);
+}
+
+void loop() {
+    if (Serial.available()) {
+        char ch = Serial.read();
+        Serial.print(ch);
+        soft_serial.print(ch);
+    }
+    if (soft_serial.available()) {
+        char ch = soft_serial.read();
+        Serial.print(ch);
+        soft_serial.print(ch);
+    }
+    Serial.println("A loop");
+    // Serial.println("A loop");
+    // if (soft_serial.availableForWrite()) {
+    //     Serial.println("Available");
+    // }
+    // else {
+    //     Serial.println("Unavailable");
+    // }
+    // if (Serial.availableForWrite()) {
+    //     Serial.println("Can Write");
+    // }
+    delay(1000);
+}