EnviraCOM
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Communication bus for Honeywell products
See also
- Hacking a serial module #1
- "While EnviraCOM is similar to the CAN (Controller Area Network) bus protocol, it uses a single data conductor instead of the differential pair commonly used in other CAN-type busses; it also appears to be an evolution (or at least a re-branding) of an older Honeywell multi-device 3-wire communication bus which they referred to as ”low end subsystem topology (LESST)."
- US Patent 7769932
- EnviroCom Bus 69-2644.pdf