bms-portfolio

Local two-way integration of Aico RadioLINK fire/CO alarms with Home Assistant: Ei413 Fire/CO/Fault relays into a Shelly Plus i4 DC, plus a Shelly Plus 1 to sound all alarms. No cloud gateway. House coding, points list, test record, fail-safe settings and alert automations.

Lighting and solar-shading control written as BMS strategies on existing home kit: occupancy- and daylight-driven lighting, schedules and overrides, and motorised blinds managing solar gain in coordination with heating and cooling, with interlocks and functional tests.

Software-defined radio survey of a smart home's 433/868 MHz bands with an RTL-SDR Blog V3, rtl_433 and MQTT: what transmits, what decodes and what doesn't. The findings chose each integration route: decoders, a RAMSES-II gateway, a relay interface, and supplier data for a LoRaWAN water meter.

Home energy management in BMS style: shifting EV charging and flexible appliances to cheap or low-carbon periods, peak-demand limiting and supplier flexibility events, using live tariff, smart-meter and grid carbon-intensity data, with comfort and safety constraints that always win.

Modbus TCP lab: Node-RED master polling and writing holding registers on a diagslave simulator, scaled to engineering units and cross-checked with an independent client (2,072/2,072 polls, 0 errors). Points list, commissioning record and fault-finding notes.

Whole-home energy and utility metering (planned): smart-meter electricity and gas, tariffs and costs, EV charging, mains water and sewerage, and CT-clamp sub-metering in one hierarchy. KPIs include baseload, cost per day, heating gas per degree-day and boiler cycles, with before/after measurement for controls changes.

DIN-rail training rig with real 24 V pumps: duty/standby rotation with run-hour balancing and automatic failover, plus a pump state machine with permissives, flow proving and lockout, later re-implemented on a Trend IQ411 and in a PLC for comparison.

Formal sequence of operation for a home heating and DHW plant, in commercial BMS specification style: modes, setpoints, control logic, interlocks (heating/cooling, pump overrun), alarms and fail-safes, for both the surveyed Evohome system and the target supervisory + OpenTherm design.

Living alarm and trend strategy across the whole portfolio: P1-P4 priorities with responses and escalation, an estate-wide alarm register, hygiene rules (delays, deadbands, parent suppression, shelving, nuisance review) and a trend-logging policy with retention tiers for M&V.

Design-stage multi-zone optimum start/stop for ~18 zones: learned heat-up and cool-down rates per zone vs outdoor temperature, holiday and exception schedules, with Node-RED as supervisor and two Honeywell Evohome systems executing temporary setpoints over RAMSES-II. Shadow-mode commissioning.

Exposing a heating plant's points list as a BACnet/IP device: Home Assistant entities published as Analog/Binary/Multi-state objects with units, status flags and COV, read-only by design, readable by YABE, Home Assistant's BACnet integration, Trend or Niagara clients. Points schedule to BACnet object map.

Rule-based fault detection and diagnostics for a heating plant, F1-F20, with the first rules running live as Home Assistant alerts: short cycling and low flow (measured), firing without demand, pressure decay, stuck zones, DHW overrun, cylinder stat or cut-out, inlet overpressure and implausible sensors.

Monitoring the building-automation system itself: integration and device availability KPIs, gateway and controller health, host resources, network status, verified off-site backups and an annual timed disaster-recovery restore test, with alarms routed through the alarm strategy.

Design proposals for the occupant layer of a ~110-integration Home Assistant estate: floors, areas and labels, home modes and room occupancy, a BMS-style dashboard hierarchy to high-performance HMI principles, and a catalogue of 58 automations with triggers, safety rules, priorities and status.

An ESP32 acting as a Modbus server: plant points published in a documented register map (scaling, status bitfields, function codes, exceptions) for a CODESYS soft-PLC, a Trend controller or any Modbus client, the reverse of the earlier client-side Modbus projects.

Home Assistant + Node-RED as a BMS-style supervisory layer above Evohome, ESPHome and an OpenTherm node: three-layer architecture with local fall-back, tiered command authority (temporary, rate-limited, read-back-confirmed, audit-logged writes), heartbeat and kill switch. Hosts optimum start/stop first.

Cyber-security and privacy baseline for a ~110-integration smart home, framed as OT/BMS principles: no inbound ports, encrypted device APIs, secrets management, risk-tiered write access, an audited RF transmitter, and publishing hygiene (commit identity, EXIF, true PDF redaction, vendor anonymising). Specifics withheld by design.

Portfolio hub for a move into BMS and building automation: hands-on projects across protocols (BACnet, Modbus, RAMSES-II), supervisory control, real plant instrumentation, fault diagnosis and control logic, with a skills matrix, training record and a start-here guide.

Clamp-on ultrasonic mains water metering: TUF-2000M over Modbus RTU/RS485 into an ESP32 (ESPHome) and Home Assistant, field-calibrated against measured volumes with an 8-point correction. Per-draw tracking, costs, sub-metering, pressure monitoring and leak/drift alerts.

Hands-on Trend IQ411 commissioning on a DIN-rail rig: power-up, addressing, point-to-point I/O checks and strategy in Trend SET, re-implementing duty/standby, interlocks and a PID loop, then comparing with the ESP32 and PLC versions, and viewing it from Niagara and BACnet clients.