vaillant boiler control using EBUS and HAH Nodes

Work in process still but i thought i would chuck an idea around and see if anyone has any further suggestions

I have a vaillant ecotec plus 831 boiler which uses the semi-propiertry Ebus protocol to communicate beetween the room stat and boiler

theres various homebrew ebus interfaces around on the net that allow your to send packets via TTL levels or via a 232 Level convertor

these typically connect to ebus 2 wire serial interface and communicate using the protocol spec

initial idea is to use a modified basenode and HAHCentral to communicate with a remote roomnode connected via TX & RX pins into the EBUS module which inturn is connected to the boiler

we could then send xap packets using the Serial.Comms class generated by a custom lua

xap-header
{
v=12
hop=1
uid=FF00DD00
class=serial.comms
source=dbzoo.test.demo
target=dbzoo.livebox.serial
}
Serial.Send
{
port=/dev/ttyUSB0
data=Hello world!
}

just an initial idea so far, not really sure if this is the best method of approach - suggestions welcome

Andrew

Edit - a second option (more cost effective) - http://www.ebay.co.uk/itm/Arduino-Bluetooth-Wireless-Serial-Port-Module-...

i could use the serial schema to communicate with the transmitter module