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MYOT2 OpenTherm Interfaces for boiler
This describes the Z-Wave device MYOT2, manufactured by SmartDHOME with the thing type UID of smartdhome_myot2_00_000.
The device is in the category of Controller, defining Central control interface.
The MYOT2 supports routing. This allows the device to communicate using other routing enabled devices as intermediate routers. This device is also able to participate in the routing of data between other devices in the mesh network.
Overview
Interface/actuator for OpenTherm boilers that allows you to monitor the performance of the OpenTherm boilers on which it is installed.
Inclusion Information
Include the MyOT device by pressing the function button for 8 seconds.
Exclusion Information
Include the MyOT device by pressing the function button for 8 seconds.
General Usage Information
Control the boiler using the OpenTherm protocol
Channels
The following table summarises the channels available for the MYOT2 -:
| Channel Name | Channel ID | Channel Type | Category | Item Type |
|---|---|---|---|---|
| Boiler On/Off | switch_binary | switch_binary | Switch | Switch |
| Heating circuit pressure | sensor_barpressure | sensor_barpressure | Pressure | Number |
| Return water temperature | water_temperature | sensor_temperature | Temperature | Number:Temperature |
| Boiler heating modulation | sensor_heatingmodulation | sensor_heatingmodulation | ||
| DHW Flow | sensor_waterflow | sensor_waterflow | ||
| Boiler water temperature | boiler_watertemp | sensor_temperature | Temperature | Number:Temperature |
| DHW water temperature | dhw_temperature | sensor_temperature | Temperature | Number:Temperature |
| Exhaust fumes temperature | exhaust_temperature | sensor_temperature | Temperature | Number:Temperature |
| Setpoint (heating) | thermostat_setpoint | thermostat_setpoint | Heating | Number:Temperature |
| Setpoint DHW | thermostat_setpoint | thermostat_setpoint | Heating | Number:Temperature |
Boiler On/Off
Switch the boiler on/off
Switch the power on and off.
The switch_binary channel is of type switch_binary and supports the Switch item and is in the Switch category.
Heating circuit pressure
Water pressure of the boiler
Indicates the barometric pressure.
The sensor_barpressure channel is of type sensor_barpressure and supports the Number item and is in the Pressure category. This is a read only channel so will only be updated following state changes from the device.
Return water temperature
Return water temperature
Indicates the current temperature.
The water_temperature channel is of type sensor_temperature and supports the Number:Temperature item and is in the Temperature category.
Boiler heating modulation
Boiler heating modulation in percent
Channel type information on this channel is not found.
DHW Flow
DHW (Heating water) flow
Channel type information on this channel is not found.
Boiler water temperature
Boiler (heating) water temperature
Indicates the current temperature.
The boiler_watertemp channel is of type sensor_temperature and supports the Number:Temperature item and is in the Temperature category.
DHW water temperature
DHW (hot) water temperature
Indicates the current temperature.
The dhw_temperature channel is of type sensor_temperature and supports the Number:Temperature item and is in the Temperature category.
Exhaust fumes temperature
Indicates the current temperature.
The exhaust_temperature channel is of type sensor_temperature and supports the Number:Temperature item and is in the Temperature category.
Setpoint (heating)
Sets the thermostat setpoint.
The thermostat_setpoint channel is of type thermostat_setpoint and supports the Number:Temperature item and is in the Heating category.
Setpoint DHW
Sets the thermostat setpoint.
The thermostat_setpoint channel is of type thermostat_setpoint and supports the Number:Temperature item and is in the Heating category.
Device Configuration
The following table provides a summary of the 9 configuration parameters available in the MYOT2. Detailed information on each parameter can be found in the sections below.
| Param | Name | Description |
|---|---|---|
| 1 | Max setpoint of the boiler | Max setpoint of the boiler |
| 2 | Min setpoint of the boiler | Min setpoint of the boiler |
| 3 | Setpoint max DHW | Setpoint max DHW (hot water) |
| 4 | Setpoint min DHW | Setpoint min DHW |
| 10 | Error Flag | Error number of the boiler if any, default 0 |
| 11 | Error code | Error code, if error occurs |
| 30 | Summer mode | Summer mode (0: no 1: yes) |
| 31 | Enabling DHW | Enabling DHW (hot water, 0: no 1: yes) |
| 95 | Report rate | Report rate (in min) |
Parameter 1: Max setpoint of the boiler
Max setpoint of the boiler
Values in the range 0 to 0 may be set.
The manufacturer defined default value is 0.
This parameter has the configuration ID config_1_0 and is of type INTEGER.
Parameter 2: Min setpoint of the boiler
Min setpoint of the boiler
Values in the range 0 to 0 may be set.
The manufacturer defined default value is 0.
This parameter has the configuration ID config_2_0 and is of type INTEGER.
Parameter 3: Setpoint max DHW
Setpoint max DHW (hot water)
Values in the range 0 to 0 may be set.
The manufacturer defined default value is 0.
This parameter has the configuration ID config_3_0 and is of type INTEGER.
Parameter 4: Setpoint min DHW
Setpoint min DHW
Values in the range 0 to 0 may be set.
The manufacturer defined default value is 0.
This parameter has the configuration ID config_4_0 and is of type INTEGER.
Parameter 10: Error Flag
Error number of the boiler if any, default 0
Values in the range 0 to 999999999 may be set.
The manufacturer defined default value is 0.
This parameter has the configuration ID config_10_1 and is of type INTEGER.
Parameter 11: Error code
Error code, if error occurs
Values in the range 0 to 999999 may be set.
The manufacturer defined default value is 0.
This parameter has the configuration ID config_11_5 and is of type INTEGER.
Parameter 30: Summer mode
Summer mode (0: no 1: yes)
Values in the range 0 to 1 may be set.
The manufacturer defined default value is 0.
This parameter has the configuration ID config_30_1 and is of type INTEGER.
Parameter 31: Enabling DHW
Enabling DHW (hot water, 0: no 1: yes)
Values in the range 0 to 1 may be set.
The manufacturer defined default value is 0.
This parameter has the configuration ID config_31_1 and is of type INTEGER.
Parameter 95: Report rate
Report rate (in min)
Values in the range 0 to 0 may be set.
The manufacturer defined default value is 0.
This parameter has the configuration ID config_95_0 and is of type INTEGER.
Association Groups
Association groups allow the device to send unsolicited reports to the controller, or other devices in the network. Using association groups can allow you to eliminate polling, providing instant feedback of a device state change without unnecessary network traffic.
The MYOT2 supports 1 association group.
Group 1: Lifeline
The Lifeline association group reports device status to a hub and is not designed to control other devices directly. When using the Lineline group with a hub, in most cases, only the lifeline group will need to be configured and normally the hub will perform this automatically during the device initialisation.
Association group 1 supports 1 node.
Technical Information
Endpoints
Endpoint 0
| Command Class | Comment |
|---|---|
| COMMAND_CLASS_NO_OPERATION_V1 | |
| COMMAND_CLASS_BASIC_V1 | |
| COMMAND_CLASS_SWITCH_BINARY_V1 | |
| COMMAND_CLASS_SENSOR_MULTILEVEL_V10 | |
| COMMAND_CLASS_THERMOSTAT_SETPOINT_V1 | |
| COMMAND_CLASS_TRANSPORT_SERVICE_V1 | |
| COMMAND_CLASS_ASSOCIATION_GRP_INFO_V1 | |
| COMMAND_CLASS_DEVICE_RESET_LOCALLY_V1 | |
| COMMAND_CLASS_ZWAVEPLUS_INFO_V1 | |
| COMMAND_CLASS_CONFIGURATION_V1 | |
| COMMAND_CLASS_MANUFACTURER_SPECIFIC_V1 | |
| COMMAND_CLASS_POWERLEVEL_V1 | |
| COMMAND_CLASS_FIRMWARE_UPDATE_MD_V1 | |
| COMMAND_CLASS_ASSOCIATION_V2 | |
| COMMAND_CLASS_VERSION_V2 | |
| COMMAND_CLASS_MULTI_CHANNEL_ASSOCIATION_V3 | |
| COMMAND_CLASS_SECURITY_V1 | |
| COMMAND_CLASS_SECURITY_2_V1 |
Documentation Links
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