anyone still monitoring this thread be advised that Lutron has completed work on the Honeywell/Vista panel drivers. You can disarm/arm remotely, set phantom buttons that can trigger events like if alarm then turn on all lights or turn on a small appliance. See below for more info.

Tom

Requirements
To interface a RadioRA® 2 system with a compatible Honeywell VISTA panel offered by First Alert Professional authorized
dealers, you will need:
• RadioRA® 2 system with Main Repeater (RR-MAIN-REP-WH)
• RadioRA® 2 programming software version 6.2 or higher
• Honeywell VISTA security panel with minimum firmware version:
– 3.13 for Vista-21iP
– 9.12 for Vista-15P, -20P
– 10.3 for Vista-128BPT, -128FBPT, -32FBPT
– 10.4 for Vista-250BPT, -250FBPT
• Honeywell Connected Building Module (4232CBM)
• Null Modem Serial Cable or Null Modem Adapter with a Straight-through Serial Cable
• General understanding of RadioRA® 2 systems and Honeywell VISTA security panel