WB-MIR v.3 Modbus register map

Description

Register map WB-MIR v3 Registers contains the complete list of available registers, their addresses, data types, access modes and allowed values. Use this information to integrate the device with Modbus controllers and automation systems. Registers are grouped by function to simplify parameter lookup and configuration.

IR-related registers are described in detail in Using the IR transceiver in WB-MSW and WB-MIR.

Legend
RO / RW	Read only / Read/Write
Shown in bold	Default register value
xN	Multiply the register value by this factor to obtain the value in the stated units. If omitted, assume 1
⚡	This register supports data transmission using events in Fast Modbus.
FW	Firmware version that introduced the register. Blank means it has always been available.
Error:	Value on error
Grey cell	Service register: purpose, format and contents may change in later firmware

Device Modbus registers
Address		Register parameters			Channel	Description	Values	FW
Dec	Hex	Type	Access	Format	Channel	Description	Values	FW
0	0x0000	Discrete input	RO	u16		Current state of the 1W input	0 — open or 1-Wire mode selected, 1 — closed
8	0x0008	Holding	RW	u16		Communication loss timeout	s, 1 - 65534 (10)	4.32.1
100	0x0064	Holding	RW	u16		Reset input activation counter	1 - reset counter
275	0x0113	Holding	RW	u16		1W input mode	0 — 1-wire, 1 — digital input
277	0x0115	Input	RO	u16		1W input activation counter
340	0x0154	Holding	RW	u16		Input debounce time	ms, 0 - 100 (50)
375	0x0177	Input	RO	u8		Infrared transceiver present	0 or 1
464	0x01D0	Input ⚡	RO	u16		Short-press counter
480	0x01E0	Input ⚡	RO	u16		Long-press counter
496	0x01F0	Input ⚡	RO	u16		Double-press counter
512	0x0200	Input ⚡	RO	u16		Short-then-long-press counter
956	0x03BC	Holding	RW	u8		Action in safe mode	0 - do nothing, 1 - play an IR command	4.32.1
957	0x03BD	Holding	RW	u8		IR command number in safe mode	1 - 80 (1)	4.32.1
1100	0x044C	Holding	RW	u16		Long press time	ms 500 - 5000 (1000)
1140	0x0474	Holding	RW	u16		Second press waiting time	ms 0 - 2000 (300)
1-Wire sensors
24	0x0018	Coil	RW	bool	Input 1	Save newly detected sensors	1 — save new sensors	4.35.0
32	0x0020	Coil	RW	bool		Save newly detected sensors on all inputs	1 — save new sensors	4.35.0
16	0x0010	Discrete input	RO	bool	Input 1	Sensor polling status on the input. The sensor is polled without assignment by ID; this register is valid only with one sensor on the input	0 — sensor missing or polling errors, 1 — sensor connected and polled successfully
128 - 147	0x0080 - 0x0093	Discrete input	RO	bool	Input 1	Polling status of sensor 1–20. The sensor whose ID is stored in the corresponding assignment slot is polled (see Sensor ID 1–20 registers)	0 — empty slot, sensor not found on bus, or polling errors, 1 — sensor connected and polled successfully	4.35.0
7	0x0007	Input	RO	s16	Input 1	DS18B20 sensor temperature. Valid only with one sensor on the input. Includes the correction assigned to the first slot	x0.0625, °C Error: 0x7FFF
20	0x0014	Input	RO	s16	Input 1	Last valid DS18B20 temperature reading. Valid only with one sensor on the input. Includes the correction assigned to the first slot	x0.0625, °C	4.35.0
99	0x0063	Holding	RW	u16		DS18B20 erroneous-value filter. A reading of 85 °C is rejected if it differs from the previous reading by more than the filter threshold.	x0.0625, °C 0 — filter disabled, 1…19200 (32)
101	0x0065	Holding	RW	u16		Temperature sensor polling interval. When changing this parameter, also change the coefficient in register 99.	s, 1 - 60 (2)
376	0x0178	Input	RO	u8	Input 1	1-Wire sensor present	0 or 1
448	0x01C0	Input	RO	u8	Input 1	DS18B20 power status. May work incorrectly with some clone sensors	1 — all sensors externally powered, 0 — at least one sensor uses parasitic power
456	0x01C8	Input	RO	u16	Input 1	Line-busy error counter
1536 - 1555	0x0600 - 0x0613	Input	RO	s16	Input 1	Sensor 1–20 temperature including correction	x0.0625, °C Error: 0x7FFF	4.35.0
1616 - 1635	0x0650 - 0x0663	Holding	RW	s16	Input 1	Sensor 1–20 temperature correction. Added to the sensor reading. Assigned to the slot, not the sensor ID: replacing the sensor in a slot retains the correction	x0.0625, °C −160 to 160 (0), equivalent to ±10 °C	≥ 4.36.0
1696 - 1715	0x06A0 - 0x06B3	Input	RO	s16	Input 1	Sensor 1–20 temperature without correction	x0.0625, °C Error: 0x7FFF	≥ 4.36.0
3328	0x0D00	Input	RO	u8	Input 1	Number of newly detected sensors		4.35.0
3336	0x0D08	Input	RO	u8	Input 1	Number of newly saved sensors		4.35.0
3344	0x0D10	Input	RO	u8	Input 1	Number of detected sensors		4.35.0
3584 - 3603	0x0E00 - 0x0E13	Input	RO	s16	Input 1	Last valid temperature of sensor 1–20 including correction	x0.0625, °C	4.35.0
3680 - 3759	0x0E60 - 0x0EAF	Input	RO	u64	Input 1	ID of newly detected sensor 1–20 (4 registers per sensor)	byte 0 — family code, bytes 1–6 — serial number, byte 7 — reserved (0) 0 — sensor absent	4.35.0
4352 - 4431	0x1100 - 0x114F	Input	RO	u64	Input 1	ID of detected sensor 1–20 (4 registers per sensor)	byte 0 — family code, bytes 1–6 — serial number, byte 7 — reserved (0) 0 — sensor absent	4.35.0
5632 - 5711	0x1600 - 0x164F	Holding	RW	u64	Input 1	Sensor ID 1–20 — input assignment slot (4 registers per sensor)	byte 0 — family code, bytes 1–6 — serial number, byte 7 — reserved (0) 0 — sensor unused	4.35.0

Legend
RO / RW	Read only / Read/Write
Shown in bold	Default register value
xN	Multiply the register value by this factor to obtain the value in the stated units. If omitted, assume 1
⚡	This register supports data transmission using events in Fast Modbus.
FW	Firmware version that introduced the register. Blank means it has always been available.
Error:	Value on error
Grey cell	Service register: purpose, format and contents may change in later firmware

Connection settings, firmware version and other service registers
Address		Register parameters			Description	Values	Note
Dec	Hex	Type	Access	Format	Description	Values	Note
Connection settings
110	0x006E	Holding	RW	u16	RS-485 baud rate. RS-485 connection parameter settings	×100, baud 12 — 1200 bit/s, 24 — 2400 bit/s, 48 — 4800 bit/s, 96 — 9600 bit/s, 192 — 19200 bit/s, 384 — 38400 bit/s, 576 — 57600 bit/s, 1152 — 115200 bit/s
111	0x006F	Holding	RW	u16	RS-485 parity setting	0 — no parity (none), 1 — odd, 2 — even
112	0x0070	Holding	RW	u16	RS-485 stop bits See: stop-bit tolerance	1, 2
128	0x0080	Holding	RW	u16	Device Modbus address (details)
Device model and firmware version
200-205	0x00C8 - 0x00CD	Input	RO	string	Device model
206-219	0x00CE - 0x00DB	Input	RO	string	Device model extension.	Read 20 registers (200–219) to obtain the device model	Only in firmware supporting Fast Modbus
220-244	0x00DC - 0x00F4	Input	RO	string	Firmware build commit hash and branch name (2 characters per register)
250-265	0x00FA - 0x0109	Input	RO	string	Firmware version
266-269	0x010A - 0x010D	Input	RO	u64	Serial number extension
270-271	0x010E - 0x010F	Input	RO	u32	Serial number
290-301	0x0122 - 0x012D	Input	RO	string	Firmware signature
320	0x0140	Input	RO	u16	Firmware version in numeric format (details)	MAJOR	Only in firmware supporting Fast Modbus
321	0x0141					MINOR
322	0x0142					PATCH
323	0x0143			s16		SUFFIX
324-325	0x0144 - 0x0145	Input	RO	u32	Firmware version in numeric format		Only in firmware supporting Fast Modbus
326-327	0x0146 - 0x0147	Input	RO	u32	Firmware version in big-endian format		Only in firmware supporting Fast Modbus
Other information
104-105	0x0068 - 0x0069	Input	RO	u32	Uptime since boot	seconds
120	0x0078	Holding	RW	u16	Reboot device without saving state	Any non-zero value reboots the device
129	0x0081	Holding	RW	u16	Enter firmware update mode for 2 minutes	Any non-zero value enters firmware update mode
330-337	0x014A - 0x0151	Input	RO	string	Bootloader version
130	0x0082	Holding	RW	u16	Disable Status LED	0 — enabled 1 — disabled
113	0x0071	Holding	RW	u16	Delay before replying to a Modbus request	ms 0…254 (0)	Only in firmware supporting Fast Modbus
131	0x0083	Holding	RW	u16	Enter firmware update mode using the current communication settings. To check whether the firmware and bootloader support this feature, read this register. If reading succeeds and returns `0`, the feature is supported.	Writing 1 enters firmware update mode
114	0x0072	Holding	RW	u16	Continuous reading across register gaps	0 — disabled 1 — enabled 2 — enabled persistently across reboots	Only in firmware supporting Fast Modbus
121	0x0079	Input	RO	u16	Current supply voltage	mV
122	0x007A	Input	RO	u16	Minimum supply voltage since boot, without averaging	mV
125	0x007D	Input	RO	u16	Current supply voltage, without averaging	mV
119	0x0077	Input	RO	u16	Minimum microcontroller supply voltage since boot, before averaging	mV
123	0x007B	Input	RO	u16	Microcontroller supply voltage	mV
124	0x007C	Input	RO	s16	Internal microcontroller temperature	x0.1, °C
65402	0xFF7A	Holding	RW	u16	Reset device settings to defaults. Communication settings are retained. The device reboots after the reset.	Writing 1 resets the settings	Since firmware 4.33.0
304-319	0x0130-0x013F	Input	RO	string	Device batch number. Available only on devices manufactured from 21 January 2026.		Since firmware 4.34.0
64256-64383	0xFB00-0xFB7F	Input	RO	u16	FlashFS: free space per page	bytes	Since firmware 4.34.0
64384-64511	0xFB80-0xFBFF	Input	RO	u16	FlashFS: total size of current files per page	bytes
64512-64639	0xFC00-0xFC7F	Input	RO	u16	FlashFS: page fragmentation	0…100 % 0 — all data is current, 100 — no current data
64640-64767	0xFC80-0xFCFF	Input	RO	u16	FlashFS: page erase counter
65504	0xFFE0	Input	RO	u16	Maximum stack usage	bytes 0 — stack corrupted	Since firmware 4.34.0
65505	0xFFE1	Input	RO	u16	Free RAM	bytes
65506	0xFFE2	Input	RO	u16	Used RAM	bytes
65507	0xFFE3	Input	RO	u16	Stack size	bytes
65508	0xFFE4	Input	RO	u16	Cause of last MCU reset	1 — LPWR, 2 — WWDG, 3 — IWDG, 4 — SFT, 5 — POR, 6 — PIN, 7 — OBL, 8 — V18PWR	Since firmware 4.34.0
65509	0xFFE5	Input	RO	u32	Firmware update counter		Since firmware 4.34.0