Arduino ebus adapter

diff --git a/arduino_ebus/arduino_ebus.ino b/arduino_ebus/arduino_ebus.ino
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+++ b/arduino_ebus/arduino_ebus.ino
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+/*
+ * http://ebus-wiki.org/lib/exe/fetch.php/ebus/arduinoebus.pdf
+ * 
+ * I had to increase values to 47k and 10k on Vaillant boiler so that it doesn't
+ * draw 22V line down to 9V
+ * 
+ * A0 --*--[47k]--- EBUS+
+ *      |
+ *    [10k]
+ *      |
+ * GND -*------------ EBUS-     
+ * 
+ * D13 -> serial RX -> D1
+ */
+
+int in=A0;
+int out=13;
+
+int treshold = ((9.0*1023.0)/20.02);
+
+void setup() {
+  pinMode(in, INPUT);
+  pinMode(out, OUTPUT);
+//  Serial.begin(2400);
+  pinMode(0, INPUT);
+  pinMode(1, INPUT);
+}
+
+void loop() {
+  int inputvalue = analogRead(in);
+  if (inputvalue > treshold)
+    digitalWrite(out,1);
+  else
+    digitalWrite(out,0);
+}

diff --git a/arduino_ebus/arduinoebus.pdf b/arduino_ebus/arduinoebus.pdf
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