Smart HVAC Control System, Automation & Monitoring Software
We build custom HVAC control software — touchscreen interfaces, web dashboards, multi-zone management, and scheduling systems that connect to your hardware over RS-485, Modbus, or BACnet.
We build custom smart HVAC control systems: touchscreen interfaces, multi-zone web dashboards, scheduling and real-time monitoring that connect to your hardware over RS-485, Modbus or BACnet. These are not off-the-shelf thermostat apps. Each system is designed around your equipment, protocols and facility layout.
A smart HVAC system is the software layer between HVAC equipment and the people who operate it. It reads sensors, controls units, runs schedules and reports status, so a building is managed from live data instead of manual rounds. The same protocol-level work is behind our IoT development projects.
What Our Smart HVAC Control Software Does
Our HVAC control software covers three layers, each built to work on its own or together.
On-device touchscreen UI
A local interface on the controller: live readings, mode selection, fan speed and ON/OFF. Operators get real-time temperature and humidity and direct control on the device itself, which keeps daily operation fast and independent of network access, with no laptop or phone needed.
Live temperature and humidity on the AIRO controller interface (GREENAIRE)
Multi-zone web dashboard
A browser interface to select, group and control HVAC units across a building. Each zone shows live status: blue when within setpoint, red when out of range. Operators can control units in bulk instead of one at a time.
Three connected zones with real-time temperature and connection status
HVAC automation through schedules
Facility managers configure weekly schedules per zone group, including time windows, temperature setpoints, fan speed and operating mode. After that, the automation handles the daily routine.
Group 1 scheduled for 08:00–18:00, 24°C, high fan speed, IDEC mode
HVAC Monitoring System: See Every Unit in Real Time
A good HVAC monitoring system tells you what is happening before occupants complain. Our monitoring layer collects readings from every unit, shows connection status at a glance and raises alerts when a value leaves its safe range.
Environmental monitoring
Indoor, outdoor and supply-air temperature plus humidity, on both the touchscreen and the web dashboard.
Energy and resource metering
Voltage, current, kW and total consumption, plus daily water usage and TDS water quality.
Connection and unit status
Each slave unit reports temperature, humidity, connection state and operating parameters to the master in real time.
Out-of-range alerts
Alarm and alert logic for readings outside setpoint, so teams react to problems instead of discovering them.
Sensor dashboard: indoor, outdoor and supply air plus current monitoring
Monitoring is not limited to HVAC. We have also built air quality monitors on custom hardware, from PCB design to a fabricated batch of working units. See our custom air quality monitor case study.
Case Study: AIRO Smart HVAC System for GREENAIRE
We built the complete software stack for GREENAIRE's AIRO smart HVAC control system. A master controller connects to multiple slave HVAC units over RS-485 Modbus, and operators get full control through a local touchscreen and a web interface.
AIRO system architecture: master controller, RS-485 Modbus bus and grouped slave HVAC units
Master-slave architecture over RS-485 Modbus
A single master controller communicates with multiple slave HVAC units. Each slave reports temperature, humidity, connection status and operating parameters back to the master in real time.
Floor-level group control
Units are organised into groups mapped to physical zones such as floors, wings and areas. Operators can switch a whole group ON or OFF, set a uniform temperature or adjust fan speeds across a zone without touching individual units.
Six groups with floor-level assignment, bulk ON/OFF and per-group mode settings
Environmental monitoring and energy metering
The system tracks indoor, outdoor and supply-air temperature, humidity, electrical current draw and water usage. A built-in power meter (voltage, current, kW, total consumption), water meter (daily litres) and TDS meter (PPM) let facility managers watch energy and water without a separate metering system.
Integrated metering panel: power consumption, water usage and TDS quality
This system is in production. The screenshots on this page come from GREENAIRE's production server, not mockups or demo environments.
BACnet-Based HVAC Automation Systems
RS-485 Modbus is one protocol. We have also delivered BACnet-based HVAC automation systems using TCP/IP communication and port-based connectivity, the standard for commercial building management.
- Application built in Python with PyQt5
- Packaged as a standalone Windows executable and configured to run on Linux as well
- Works on Windows workstations or Linux-based controllers
- Connects to your existing units, sensors and building infrastructure
That kind of cross-platform work is typical of our embedded software development services. With 6+ HVAC control projects delivered, we have worked across the protocol and platform combinations that commercial and industrial HVAC systems actually use.
Protocols, Platforms and What We Build
Communication Protocols
- RS-485
- Modbus RTU / TCP
- BACnet/IP
- MQTT
What We Build
- Touchscreen UIs for on-device HVAC controllers
- Web dashboards for remote multi-zone monitoring and control
- Scheduling per group, day and time window
- Real-time monitoring: temperature, humidity, energy and water metering
- Master-slave coordination of multiple units
- Alarm and alert systems for out-of-range conditions
Platforms
- Windows (.exe)
- Linux
- Web (browser-based)
Our software connects to your existing HVAC hardware. We handle the protocol layer, the control logic and the operator interface, and you keep your units, sensors and building infrastructure. If you also need controller boards, see our PCB design services or embedded product development.
Need a Smart HVAC Control System Built for Your Hardware?
We have built HVAC control, automation and monitoring software for 6+ clients across RS-485, Modbus and BACnet. Tell us about your equipment and we will scope a solution.
Or message us on WhatsApp: +91 62846-36956Frequently Asked Questions (FAQ)
A smart HVAC system adds a control and software layer on top of heating, ventilation and air-conditioning equipment. It reads sensors, lets operators control units locally or from a browser, runs schedules automatically and reports status.
We build the software: control interfaces, dashboards, scheduling systems and the communication layer that talks to your HVAC hardware. We work with your existing equipment or with hardware partners you choose.
RS-485, Modbus RTU and TCP, BACnet/IP and MQTT. If your system uses a different protocol, talk to us, as we have handled custom integrations before.
Yes. The AIRO system we built for GREENAIRE manages multiple slave units from a single master controller, organised into groups by floor or zone. Operators can control individual units or entire groups at once.
Yes. Our HVAC monitoring systems track temperature, humidity, current draw and water usage in real time, show connection status for every unit, and raise alerts when readings go out of range.
Both. We typically deliver a touchscreen interface for local operators and a browser-based dashboard for remote monitoring and management. The web interface works from a phone, tablet or laptop.
Yes. We have deployed HVAC control software on both Windows and Linux. For the BACnet project we packaged the same application as a Windows executable and a Linux service.
It depends on the number of unit types, the protocols involved and whether you need a touchscreen UI, a web dashboard or both. Send us your equipment list and we will scope the work and give an estimate before you commit.