Thermostat Set Point Command Class (V1); Association Command Class (V1); Configuration Command Class (V1); Command Classes For Control - Horstmann HRT4-ZW Manual

The unit shall respond to the Multilevel Sensor GET command with a Multilevel Sensor REPORT.
The report carries the measured temperature as a 2 byte signed number with a scale of C or F and a precision of 1
decimal place.
The report can be requested or sent unsolicited to the nodes in Group 5.
NOTE: If the temperature sensor functionality is disabled the measured temperature reported is 0x8000 (indicates it's
not in use).
3.2.6

Thermostat Set Point Command Class (V1)

The unit supports the Thermostat Set Point Command Class.
Set Point type of Heating is supported.
The unit will accept Set Point SET commands if the set point type matches the thermostat type configuration.
The unit will send a Set Point REPORT in response to a Set Point GET or unsolicited to the nodes in Group 4 upon a
change of demand temperature made locally at the unit.
3.2.7

Association Command Class (V1)

The following association groups are supported in the grouping identifier range 1 – 5 respectively:
Group 1 - Nodes controlled by Thermostat Mode SET command.
Group 2 - Nodes controlled by Binary Switch SET command.
Group 3 - Nodes to receive unsolicited Battery Level Reports or Low Battery Warnings.
Group 4 - Nodes to receive Thermostat Set Point Reports.
Group 5 - Nodes to receive unsolicited Multilevel Sensor Reports.
Each group contains a maximum of 4 nodes.
3.2.8

Configuration Command Class (V1)

The unit supports 3 single byte configurations for the temperature sensor functionality of the unit in the range 1 – 3
respectively.
Configuration Parameter Number 1:
0–127 disables temperature sensor, 128-255 enables temperature sensor. Default = 0.
Configuration Parameter Number 2:
0-127 = Celsius, 128-255 = Fahrenheit. Default = 0.
Configuration Parameter Number 3:
1 – 100 = Delta T in steps of 0.1 degree. Default = 10 (1.0).

3.3 Command Classes for Control

Control requires that the unit is able to send commands and receive responses within that command class [2]. Unless stated
each command class is version 1.
3.3.1

Thermostat Mode Command Class (V1)

The unit will be able to send the Thermostat Mode SET command, whereby the mode parameter will operate a control
unit for a boiler.
If a control unit is associated to Group 1 then the thermostat will use thermostat modes off and heat.