Connecting Equipment via Modbus, MQTT and API
We integrate ventilation units, meters, boiler equipment, controllers and external services via Modbus RTU/TCP, MQTT and REST API. Telegram bots, Home Assistant, CRM.
from €80 · per connected system
We connect equipment that can’t talk to a smart home directly — ventilation units, boilers, heat pumps, meters, variable frequency drives — to the automation system. We link different systems to each other and to external services.
What’s included
Ventilation and heating
Air handling units, boilers, heat pumps, chillers.
Meters
Electricity, water, heat.
Air conditioners
Split systems and VRF via gateways.
Pumps and drives
Variable frequency drives and pump sets.
External services
REST API and webhooks: CRM, weather, Telegram bots.
Bridges between systems
KNX ↔ Modbus, Modbus ↔ MQTT, Home Assistant.
How the work goes
- 1
Documentation
We collect register maps and protocol descriptions.
- 2
Communication test
We check that the equipment responds.
- 3
Polling setup
Parameters, commands, polling rate.
- 4
Logic and interface
Scenes, alarms, display in the app.
- 5
Integration notes
Register table and integration diagram.
What you get
- Table of registers or MQTT topics
- Configurations and scripts
- Integration description
Not included
- Repair and adjustment of the equipment itself
- Purchase of gateways and manufacturer licences
Price
from €80
per connected system
What the price depends on
- — Whether protocol documentation is available
- — Number of parameters
- — Non-standard protocols
- — Remote or on site
Timing
One system — usually 1–3 days of work.
For Whom
- Any facility with industrial equipment
- Dispatching
- Integrators
Systems Included
Frequently Asked Questions
Get a Preliminary Estimate
Leave your contact details — the engineer will get in touch, clarify the task and give you an approximate cost. The consultation is free.
Projects from the engineer's experience
Projects that Vladislav Kozlov, the engineer behind Tact Automation, worked on. Most were completed before the company was founded, as part of other integrators' teams.
Private residence, 860 m² — KNX across three bus lines
Basement plus two floors on three bus lines, 15 main groups and a reserve that survived four years of changes.
Private residence, 1 600 m² — KNX on four lines split by site zone
A three-year build handed over with all 1 877 group addresses named — a project another engineer can pick up without us.
Private residence, 1 100 m² — four Modbus segments, four homes
The owner reassigns his own switch keys through a web interface, without an integrator. Four Modbus segments appear in the app as four separate homes.