WB-MIR v1 - Modbus IR Remote Control/en

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This page describes the device WB-MIR v1, discontinued in 11.2017. Direct replacement is improved module WB-MIR v2

WB-MIR Module

Module internals. Contact labels are visible on the connectors

IR transmitter hole on the back of the module

Learning module with IR transceiver for IR control of various devices, including air conditioners, TVs, etc. The module is controlled from the controller or PC via RS-485 bus by Modbus commands.

Inputs

The module is powered by V+ and GND screw terminals, the RS-485 line is connected to inputs A and B. the DS18B20 External temperature sensor is connected via a parasitic power supply circuit, when the +5V and GND terminals are connected and connected to the GND terminal, the data output is connected to the 1-W terminal. D some models have an internal temperature sensor DS18B20 in the case TO-92, soldered in the upper left part of the module Board (the top view of the sensor housing is printed in this place by silkscreen).

Installation

The module is mounted on the air conditioner on a double-sided tape so that a small hole of the emitting diode on the reverse side would be located opposite the IR receiver of the air conditioner, without closing the receiver from the main console of the device. The position is selected experimentally due to the huge variety of designs of air conditioning housings. The same applies to any household devices controlled by IR channel.

Specifications

Option	Value
Power
Supply voltage	9 — 24 V DC
Power consumption	0.1 W
Transmitter range	< 1m
External sensor	Digital temperature sensor DS18B20 can be connected.
Control
Management interface	RS-485
Interface isolation	Uninsulated
Communication protocol	Modbus RTU, address is set by software, factory settings are indicated on the label
RS-485 interface parameters	speed 9600 bps; data bits 8; parity N; stop bits 2; Starting from firmware version 3.1.0 parameters interfaces can be configured programmatically: Speed: 1200, 2400, 4800, 9600 (default), 19200, 38400, 57600, 115200 bit/s (configure RS-485 communication parameters for wiren Board modbus devices) Data: 8 bit Parity check: none (default), 1 - odd (odd), 2 - even (even) Stop bits: 2 (default), 1
dimensions
Size	45x35x14 mm
Operating conditions
Air temperature	-40°C to +80°C
Relative humidity	up to 98%,without moisture condensate

Learning and using the module

Detailed description and use of the module, and a map of the registers is described in section how to work with the IR receiver in the WB-MS WB-MSW, WB-MIR devices.

Additional functionality

Address change is broadcast (slave_id 0) team record (WRITE_SINGLE_REGISTER) to holding register with address 128 (0x80).

The 6-byte module signature is stored at address 200. The signature is unique for each model of Wiren Board devices and allows to identify the model. To obtain the signatures necessary to fulfill READ_HOLDING_REGISTERS address 200 length 6. Writing to this area of memory is not supported and error 3 is returned when attempting to write to an invalid location.

Register map

Described in detail in how to work with the IR receiver in the WB-MS WB-MSW, WB-MIR devices .

Register/ address	Type	Read/ write	Default	Format	Purpose	Versions insertions
6	input	R	0x7FFF	°C × 16 (signed)	Temperature with built-in 1-Wire sensor
7	input	R	0x7FFF	°C × 16 (signed)	Temperature from external 1-Wire sensor
110	holding	RW	96	baud rate / 100	RS-485 port speed, "'divided by 100"'. Permissible speeds: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200	>3.1.0
111	holding	RW	0		configure the RS-485 port parity bit. Valid values: 0 - no parity bit (none), 1 - odd (odd), 2 - even (even)
112	holding	RW	2		number of stop bits of RS-485 port. Valid values: 1, 2
120 (0x78)	holding	RW	0	other than 0	write to the register causes a reset of the module without saving state
121 (0x79)	input	R	-	mV	current supply voltage of the module
128 (0x80)	holding	RW	1		The Modbus address of the device
200-206	input	R	see device Signature		signature
220-241	input	R		__date__ _ _ time__	the build date of the firmware
250-269	input	R		string, null-terminated	firmware version
270-271	input	R		32-bit unsigned int	unique identifier (S/N)

Device signature

The 6-byte module signature is stored at address 200. The signature is unique for each model of Wiren Board devices and allows to identify the model by Modbus:

Module	Signature
WB-MIR	WBMIR'0x00'

To get the signature of a device you need to run command READ_HOLDING_REGISTERS at 200 (length of 6 registers). Writing to this area of memory is not supported, and error 3 is returned when attempting to write to an invalid location. Empty spaces in the signature text are clogged with the value 0x00. Starting from register 220, the firmware build date is recorded, in the format numberx00timex00 as a string (example: 'Jan 27 2017 17:01:13'). The length of the record is 21 registers.

Module management from the web interface

At the moment, to connect the module WB-MIR, there are two templates: WB-MIR and WB-MIR (simple). Template WB-MIR provides a complete set of functions of the module from the web interface, including training, and a simplified version WB-MIR (simple) can be used with the already trained remote control and contains a much smaller number of controls.

WB-MIR Web interface

Simplified WB-MIR web interface

On the example of a fully functional module, consider the main controls of the module and their purpose.

The name of the control	Purpose
Input Voltage	module supply Voltage
Learn-to-RAM	Write the IR signal in the operational buffer (see section Operational mode). For learning, the control is turned ON, after learning — OFF.
Play from RAM	Play the IR signal from the operating buffer (see Operating mode).
Learn to ROMx	IR signal Recording ACC. the cell of the ROM (see section DC mode). For learning, the control is turn ON position, after learning — OFF.
Play from ROMx	Play IR signal from resp. ROM cells (see Constant mode]). For learning, the control is transferred to THE on position, after learning — OFF.
ROMx -> RAM	Copy data from ACC. ROM cells to the online buffer for editing (see Constant mode). For editing, control is transferred to THE on position, after editing — OFF.
Internal/External Temperature Sensor	Internal/external digital temperature sensor. If the sensor is missing or defective, its name is highlighted in red.
Serial NO	the Serial number of the WB-MIR module may be required when contacting technical support.
Reset all ROM	Resets the contents of all memory locations. Be careful, ROM cleaning will be done without asking for confirmation!

Command-line device management

The Wiren Board controller software includes modbus_client utility to work with devices connected to the RS-485 outputs, via Modbus Protocol, the detailed description of the command is on the page Modbus client. Access to the command line is described in SSH.

Register reading example

Let's check whether it is true that we are connected to the module of the desired type. (Module wb-mqtt-serial needs to be stopped). At address 200, a unique signature of 6 registers is stored. Let's read 6 registers, starting with the address 200, and convert the received answer from hexadecimal digits into a character string:

echo  -e `modbus_client --debug -mrtu -pnone -s2 /dev/ttyAPP1 \
-a1 -t0x03 -r200 -c 6 | \
grep Data | sed -e 's/0x00/\\\x/g' -e 's/Data://' -e 's/\s//g'`

As a result of the command, we receive string WBMIR. The WB-MIR module in the example has Modbus address 1.