I looked in forums and the only thing I could find was the discussion on M-bus which is the European standard for reading water/gas meters. The US standard is the Sensus ICE Register which is an ascii based command/response protocol. You can get the standard from Sensus by signing non-disclosure docs for something they call open source…but I was wondering whether anyone actually has written some script for this so I don’t have to re-invent the wheel. Since this is an ascii protocol I assume that means it is either based on rs232 or rs485, but I have no evidence of either at this point. I also get the impression there is a pulse that is issued be the master to get the meter to send the response.
Anyone actually know anything about this protocol?