Created Arduino sketch

Code/ESPDebugger/ESPDebugger.ino

@@ -0,0 +1,59 @@
+/*
+ * Simple sketch to read MBus data from electrical meter
+ * As the protocol requires "Even" parity, and this is
+ * only supported on the hardware port of the ESP8266,
+ * we'll have to use Serial1 for debugging.
+ * 
+ * This means you'll have to program the ESP using the 
+ * regular RX/TX port, and then you must remove the FTDI
+ * and connect the MBus signal from the meter to the
+ * RS pin. The FTDI/RX can be moved to Pin2 for debugging
+ * 
+ * Created 14. september 2017 by Roar Fredriksen
+ */
+
+
+byte buffer[512];
+int bytesRead;
+
+void setup() {
+  // Initialize the Serial1 port for debugging
+  // (This port is fixed to Pin2 of the ESP8266)
+  Serial1.begin(115200);
+  while (!Serial1) {}
+  Serial1.setDebugOutput(true);
+  Serial1.println("Serial1");
+  Serial1.println("Serial debugging port initialized");
+
+  // Initialize H/W serial port for MBus communication
+  Serial.begin(2400, SERIAL_8E1);
+  while (!Serial) {}
+  Serial1.println("MBUS serial setup complete");
+
+  bytesRead = 0;
+}
+
+void loop() {
+  if (Serial.available())
+  {
+    byte newByte = Serial.read();
+    buffer[bytesRead++] = newByte;
+    bool completed = bytesRead > 1 && newByte == 0x7E;
+        
+    if (completed)
+      writeAndEmptyBuffer();
+  }
+}
+
+
+void writeAndEmptyBuffer()
+{
+  for (int i = 0; i < bytesRead; i++)
+  {
+    if (buffer[i] < 0x10) Serial1.print("0");
+    Serial1.print(buffer[i], HEX);
+    Serial1.print(" ");
+  }
+  Serial1.println();
+  bytesRead = 0;
+}