Omnibus
The serial equipment stays. The limitations don’t.
Omnibus is a field-bus gateway: it puts legacy serial equipment — the kind that runs most existing buildings — onto modern networks, where GEM or any other system can use it.
Why it exists
Most buildings already own their hardest integration problem.
Air handlers on BACnet MS/TP. Meters on Modbus RTU. Card readers on OSDP. This equipment works, is paid for, and will outlive several software platforms — but it speaks over twisted-pair serial buses that modern software can’t reach directly.
Omnibus sits at the edge, speaks the serial protocols natively, and republishes everything over TCP, MQTT, REST, and webhooks. GEM uses it to reach legacy field devices — and because those outputs are open, anything else you run can use it too. It’s a gateway, not a gatekeeper.
Where it fits
Typical installs
Retrofit without rip-out
Bring a 15-year-old mechanical plant into GEM’s analytics and control without touching the equipment that runs it.
Metering rollups
Aggregate Modbus and M-Bus meters across floors or buildings into one queryable stream for billing and energy work.
Access hardware
Put OSDP readers on the network with modern supervision instead of proprietary panels.
Have a serial bus problem?
Tell us what’s on the wire — protocol, device count, and what you want it to do. We’ll spec the gateway.