Why do I see unexpected values when reading horizontal vanes or ionization status?

Register address 9 is shared between ionization and horizontal vanes functions. Make sure you interpret the register value according to the active function. The template maps both, but only one function may be relevant depending on your Gree model.

Can I connect multiple ONOKOM GR-3-MB-B gateways on one RS-485 bus?

Yes. Each gateway must have a unique Modbus slave address. Set the address via register 128 on each unit before connecting them to the same bus.

The gateway is not responding at all. What should I check?

Verify that the baud rate is set to 9600 on both the ModbusCloud gateway and the ONOKOM device. Check RS-485 wiring polarity (A to A, B to B) and ensure a termination resistor is present if the cable run is long.

Which Gree air conditioner models are compatible with this template?

The template works with any Gree AC unit supported by the ONOKOM GR-3-MB-B gateway. Consult the ONOKOM compatibility list for your specific Gree model before purchasing the gateway.

Free Modbus template: ONOKOM AIR GR-3-MB-B

Name: ONOKOM AIR GR-3-MB-B
Brand: Onokom
SKU: 3116355c-4783-47da-b851-7526554b0261

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Free Modbus template: ONOKOM AIR GR-3-MB-B | ModbusCloud

Registers (20)

15 read / 14 write

Name	Address	Function	Type	Unit	Access
Indoor air temperature	3	FC03	uint16	°C	R
AC connected	20	FC01	uint16		R
Ionization (Status)	9	FC01	uint16		R/W
Self cleaning (Status)	10	FC01	uint16		R/W
Sleep mode (Status)	8	FC01	uint16		R/W
Quiet mode (Status)	4	FC01	uint16		R/W
Turbo mode (Status)	7	FC01	uint16		R/W
Eco mode (Status)	6	FC01	uint16		R/W
Vertical vanes (Status)	10	FC03	uint16		R/W
Indoor heat exchanger temperature (Status)	23	FC03	uint16	°C	R
Error count	-1	FC04	uint16		R
Error count	-1	FC02	uint16	count	R
Horizontal vanes	9	FC03	uint16		R/W
Error code	1	FC04	uint16		R
Modbus address	128	FC03	uint16		R/W
Active (Control)	1	FC05	uint16		W
Loxone modes (Control)	15	FC06	uint16		W
Smart fan speed	8	FC06	uint16		W
Target temperature	5	FC06	int16	°C	W
Vanes swing	11	FC06	uint16		W

ONOKOM AIR GR-3-MB-B

Overview

Key readings

Available commands

Use cases

Installation

Things to watch for

Registers (20)

Working with Modbus in your projects?

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