I see no data after connecting the Airzone Aidoo. What should I check?

Verify that the baud rate is set to 19200 and parity is set to odd on both the Aidoo and the Modbus gateway. Also confirm the RS-485 A and B wires are not swapped.

Can I connect multiple Airzone Aidoo devices on the same RS-485 bus?

Yes, each Aidoo must have a unique Modbus slave address. Add a separate device entry in ModbusCloud for each unit, all using the same template.

What unit are the temperature values in?

Setpoint and local temperature registers return values in degrees Celsius as uint16. No scaling factor is required.

Do I need to enable Modbus on the Airzone Aidoo before connecting?

Yes, Modbus RTU communication must be enabled in the Aidoo configuration menu. Refer to the Airzone Aidoo installation manual for the exact steps.

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Free Modbus template: Airzone Aidoo | ModbusCloud

///Airzone Aidoo

Modbus RTU

Airzone Aidoo

Name: Airzone Aidoo
Brand: Airzone
SKU: f2beb4d4-c204-4cc4-98c7-5a1c04d9b311

Airzone

Manages and integrates HVAC equipment via Modbus RTU

Overview

This template integrates the Airzone Aidoo HVAC controller via Modbus RTU. It reads on/off state, setpoint temperature, local temperature, and operating mode. It also provides full write access to control these parameters remotely through the ModbusCloud platform.

Key readings

On/Off state
Setpoint temperature
Local temperature
Operating mode

Available commands

On/Off
Setpoint temperature

Local temperature

Mode selection

Use cases

Monitor real-time room temperature and setpoint of each HVAC zone on a cloud dashboard.
Control on/off state remotely to switch units off outside business hours and reduce energy waste.
Create an alert when local temperature deviates more than 2 degrees from the setpoint for over 15 minutes.
Switch operating modes between heating and cooling from the ModbusCloud portal without an on-site visit.
Log historical temperature data per zone to support energy audits and comfort optimization reports.

Installation

1Wire the RS-485 A and B terminals from the Airzone Aidoo to the corresponding terminals on your ModbusCloud gateway (MCG or MLP series).
2Set the Airzone Aidoo Modbus slave address to a unique value on the bus, using the Aidoo configuration interface.
3Configure the serial port on your gateway to 19200 baud, odd parity, and 1 stop bit to match the Aidoo settings.
4Import the Airzone Aidoo template from the ModbusCloud template library and assign the correct slave address.
5Verify that live readings for on/off state, setpoint, local temperature, and mode appear on your ModbusCloud dashboard.
6Test write access by toggling the on/off state or adjusting the setpoint from the platform and confirming the change on the unit.

Things to watch for

I see no data after connecting the Airzone Aidoo. What should I check?: Verify that the baud rate is set to 19200 and parity is set to odd on both the Aidoo and the Modbus gateway. Also confirm the RS-485 A and B wires are not swapped.
Can I connect multiple Airzone Aidoo devices on the same RS-485 bus?: Yes, each Aidoo must have a unique Modbus slave address. Add a separate device entry in ModbusCloud for each unit, all using the same template.
What unit are the temperature values in?: Setpoint and local temperature registers return values in degrees Celsius as uint16. No scaling factor is required.
Do I need to enable Modbus on the Airzone Aidoo before connecting?: Yes, Modbus RTU communication must be enabled in the Aidoo configuration menu. Refer to the Airzone Aidoo installation manual for the exact steps.

Registers (4)

4 read / 4 write

Name	Address	Function	Type	Unit	Access
On_Off	0	FC03	uint16		R/W
Setpoint	1	FC03	uint16	°C	R/W
Local temperature	2	FC03	uint16	°C	R/W
Modes	3	FC03	uint16		R/W

Working with Modbus in your projects?

ModbusCloud is the hardware-plus-software platform that installers use to monitor, visualise and control Modbus devices from one portal. This template is one of hundreds you can use right away.

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Specifications

Protocol: Modbus RTU
Brand: Airzone
Registers: 4
Compatible models: Airzone Aidoo
Last updated: 2 April 2026

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