WB-MIR v1 - Modbus IR Remote Control
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This page describes the device WB-MIR v1, discontinued in 11.2017. Direct replacement is improved module WB-MIR v2
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:
|
| 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.
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.