In the Ademco Document
formatting link
describes the Serial Port Protocol and Message Format used in connecting a Home Automation Control to a VISTA-128BP/250BP using the Ademco 4100SM or VA8201 modules.
For example, to read the Zone Status on the serial port, the Ademco document says (only part of the doc is displayed here):
Zone Status Messages -------------------- The table below describes the typical commands used to query the control panel for a Zone Status and the zone?s partition.
NOTE: The system can provide the status for zones 1 to 96 only.
Action String Definition ----------- ------------------- ------------------------------------- Zone Status 08zs004B (CR-LF) The panel responds with a Zone Request Status Report. Note: This message should be sent only when an initial connection is made with the panel. It is not intended for use as a ?polling? command. The panel can be programmed to send System Notification Messages concerning zone status.
Zone Status 68ZSD...00CC (CR-LF) The panel sends this message in Report response to a Zone Status Request. The data portion of this message is 96 characters (one character for each zone in order). Each character is the sum of all applicable status values, expressed in hexadecimal using ASCII characters 0-9 and A-F.
Status Values: 0 Closed 1 Open 2 Trouble 4 Alarm 8 Bypassed
Example: a Zone Status Report for a system in which Zone 1 is Open, Zone 2 is Open, in Trouble, and Bypassed, and the rest Closed, would begin 68ZS1B00...
Is there a document on the Caddx NX-8E that likewise explains the serial port data stream?
Thanks, -earlw