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@Giuseppe

Do you know where the 045 & 046 comes from? Can't find it in the protocol PDF's

Forget the part about the TTL HC60 signal driving the 232 cable, the opto isolator takes care of that. I'm on a Mac any idea when you will post the source? Thanks

P.S Forgot to add I'm looking at a BDR91 relay box which is a later version of the HC60, It allegedly can transmit and receive possiblities for control....

Colin Thanks for that, I understand the RS232 level thing for the power. I was assuming that the RX data on the HC60 would be ttl level and therefore wouldn't drive the 232 FTDI cable correctly. For the software how does it pick up the description of the HR80's Dinning room etc? Do you have to edit ...

Colin Excellent work, can I have clarify a two points. Which version of the FTDI cable did you use the link talks about different versions i.e. 3.3 vs 5 volt etc? If you run the stand alone version with power taken from the RS232 port is the opto isolator still required if so could you post the circ...