Aprilaire WiFi Thermostats

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This driver is for a network of one or more Aprilaire WiFi thermostats. Driver was written and tested with Aprilaire Model 8820.

Version History

Version 1.0: The original release of the driver

1.01: Updates variable names for clarification

1.02: Removes a debug print statement

1.03: Apex Update

1.04: Adds fix for sensor values (current temp, relative humidity...etc) not updating correctly

1.05: Adds support for outdoor temperature sensor, Adds support for Celcius feedback.

1.06: Fixes issues connecting sources to rooms. This is an APEX autoprogramming fix only, no functional changes.

IP Connection

Enter the IP address of the Thermostat in the driver system settings window

Number of Thermostats Supported

The driver supports up to 24 thermostats

Auto HVAC Mode

If you intend to allow any thermostat on the bus to be placed in the Auto HVAC mode (not the Auto Fan mode), you should use only the "Set Heat Setpoint" / "Set Cool Setpoint" commands. The "Set Current Mode Setpoint" / "Current Mode Setpoint Up" / "Current Mode Setpoint Down" commands and the "Setpoint (mode-dependant)" system variable are not supported when the thermostat is in Auto mode.

Thermostat Messages

Thermostats rotate up to four messages permanently in their display and one temporary message. Line one supports 16 characters while line two supports 15. To set line two separate the message with the "@" symbol

Example: TEST@MESSAGE

TEST would be displayed on line one, and MESSAGE on line two

Setting the message to an empty string clears the message.

System Events

The driver triggers system events when heat, cool, humidity, and dehumidity change states.

Holds

When there's no hold the stat follows the current schedule. Changing a set point manually puts the thermostat into temporary hold until the next scheduling change when the stat switches back to the schedule. Vacation holds will have to be created at the thermostat. The driver can show the hold mode status.