HRT4-ZW

Horstmann HRT4-ZW THERMOSTAT

The user manual can be found here and the Z-Wave information here.

After you include the HRT4-ZW thermostat in Vera, you will have to change some configuration settings in order to make it work properly in the network and report the temperature to Vera. By default HRT4 is set to not do this automatically (see configuration parameter 1 at the bottom of this page) so you have to add this parameter yourself and insert a value higher than 128. To add a new configuration parameter, you have to click on the little wrench on the Dashboard, go to Device Options and click on ‘Add configuration settings’, then fill in the values for Parameter 1 as below:

If you also want to make the thermostat wake up more frequently, you can specify a lower value for the Wakeup interval by clicking on the little wrench, go to Settings and edit the ‘Wakeup interval’ field as shown in the picture below. By default this value is set to 1800 seconds, but you can set it to a minimal value of 256 seconds. This is the shortest wakeup time interval that we know about for this sensor.

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).