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Modbus RS485 smart thermostats are specialized HVAC controllers designed for industrial and commercial building automation, offering robust, long-distance communication (up to 1,200m) and centralized, multi-device management. These units often support Modbus RTU, enabling integration into PLC, SCADA, or BACnet systems to control fan coils, heat pumps, and underfloor heating.
Top Modbus RS485 Smart Thermostats
- thanos EVO white temp_rH RS485 Modbus (~$490 on ifs-store.com): A premium room operating unit with a 4.8" TFT touchscreen, offering temperature/humidity control and lighting/shading control.
- Tuya Zigbee & Wifi & Modbus RS485 Smart Knob (~$30 on AliExpress): An affordable, compact option for gas boilers and electric heating, supporting both Wi-Fi/Zigbee and Modbus RS485.
- LCF02 Touch 5DO RS485 Modbus 24 V (~$187 on ifs-store.com): A 24V fan coil controller with a black touch screen, suitable for room climate control.
Key Features
- Multi-Drop Network: Up to 32 devices can share the same two-wire bus, allowing efficient communication over long distances (up to 1,200m).
- Communication Protocol: Uses standard Modbus RTU over RS485, with support for Function Codes 3, 6, and 16 for reading/writing registers.
- Advanced Control: Provides PID regulation, 0-10V analog outputs for modulating control, and fan speed control.
- Data Monitoring: Real-time data logging, sensor input for temperature and humidity, and alarm signals for faults.
- Smart Integration: Often includes Wi-Fi/Tuya compatibility alongside RS485, enabling app-based control.
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Web results
RS485 Modbus Smart Thermostat for fan coil, valve, heat ...
E-TOP Controls
https://www.etopcontrols.com › Others
E-TOP Controls
https://www.etopcontrols.com › Others
Equipped with WiFi connectivity, this digital programmable indoor heat pump thermostat enables users to remotely manage and control their underfloor heating ...Read more
Discussions and forums
Need assistance to setup thermostat BecaSmart BHT-1000 Modbus
Home Assistant Community ·
2 years ago
Need assistance to setup thermostat BecaSmart BHT-1000 Modbus
Home Assistant Community ·
2 years ago
Aprilaire Thermostat 8800 any MODBUS experts? - Feature Requests
Home Assistant Community ·
4 years ago
Aprilaire Thermostat 8800 any MODBUS experts? - Feature Requests
Home Assistant Community ·
4 years ago
intercepting rs 485 communication - Interfacing
Arduino Forum ·
15 years ago
intercepting rs 485 communication - Interfacing
Arduino Forum ·
15 years ago
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Web results
Modbus Thermostat - WiFi - OEM
Alledio
https://www.alledio.com › alledio-oem-thermostat-mod...
Alledio
https://www.alledio.com › alledio-oem-thermostat-mod...
Alledio Thermostat is the world's most flexible and adaptable OEM Modbus thermostat solution, featuring a customizable user interface and firmware.Read more
Rs485 Modbus Wifi Thermostat Dual Sensor Ec Fan ...
Hotowell
https://www.hotowell.com › product › fc08-ecnw-rs485-...
Hotowell
https://www.hotowell.com › product › fc08-ecnw-rs485-...
HTW-FC08-ECNW smart fan coil thermostat is designed with EC Fan + 1 cool valve + 1 heat valve + externals sensor + Keycard + Modbus +WiFi communication ...Read more
People also ask
Can RS485 be Modbus?
RS485 Modbus facilitates industrial data exchange by enabling efficient communication between a master device and multiple slave devices, which is crucial for process automation.
RS485 Modbus: A Comprehensive Guide to Industrial Communication
U.S. Converters LLC
https://www.usconverters.com › rs485-modbus-compreh...
U.S. Converters LLC
https://www.usconverters.com › rs485-modbus-compreh...
What is the difference between RS485 and Modbus RS485?
RS-485 is a physical layer standard used for serial communication, allowing multiple devices to share the same communication line. It defines how data is electrically transmitted between devices. Modbus, on the other hand, is a communication protocol that operates over various physical layers, including RS-485.
Is RS-485 and Modbus the Same? | Key Differences Explained - IndMALL
IndMALL
https://www.indmall.in › faq › is-rs-485-and-modbus-same
IndMALL
https://www.indmall.in › faq › is-rs-485-and-modbus-same
How to connect RS485 Modbus?
4:24
6:02
But then as you daisy chain your other field devices. Together you don't crisscross them then youMoreBut then as you daisy chain your other field devices. Together you don't crisscross them then you just match so you just got to crisscross it between the master. And the first slave in most cases.
How to wire modbus rs485 serial communications to a MOXA Mgate ...
YouTube
https://www.youtube.com · FMS Integration LLC
YouTube
https://www.youtube.com · FMS Integration LLC
Is Modbus RS485 digital or analog?
digital communication
RS-485 Modbus is a digital communication system widely used in industrial environments. It allows multiple devices to share data over a single network, transmitting process values, diagnostics, and configuration data between sensors and control systems.Jul 30, 2025
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Web results
Thermostat Rs485
eBay
https://www.ebay.com › shop › thermostat-rs485
eBay
https://www.ebay.com › shop › thermostat-rs485
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AliExpress
https://www.aliexpress.com › item
AliExpress
https://www.aliexpress.com › item
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The difference and connection between Modbus and RS485
BecaSmart
https://www.becasmart.com › news
BecaSmart
https://www.becasmart.com › news
Now, many RS485 communication occasions in the industry use Modbus protocol, so today we will learn about RS485 communication and Modbus communication protocol.Read more
Connecting Devices via the Modbus (RS 485 Bus)
YouTube · i3 Engineering
320+ views · 9 months ago
YouTube · i3 Engineering
320+ views · 9 months ago
Communication between the devices will be carried out via the Modbus RTU protocol over the RS485 interface.
On Sale Thermostat RS485 WiFi Control & Programmable
Alibaba
https://www.alibaba.com › showroom › thermostat-rs485
Alibaba
https://www.alibaba.com › showroom › thermostat-rs485
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Web results
Modbus Lora Voltage-free Smart Thermostat for Heat ...
Xiamen E-Top Controls Technology Co., Ltd.
https://www.etopthermostat.com › modbus-lora-voltage...
Xiamen E-Top Controls Technology Co., Ltd.
https://www.etopthermostat.com › modbus-lora-voltage...
With its dual compatibility, smart WiFi connectivity, programmable scheduling, and energy-efficient operation, this thermostat provides convenience, comfort, ...Read more