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==== 4.3 Assign a Static IP to the Thermostat ====

* On the thermostat, navigate to '''Manual Setup &gt; Network Settings'''.
* Assign a static IP to the thermostat. This ensures that the IP address does not change, which is very important or you will find yourself freezing to death when you can’t turn off the A/C.

<blockquote>'''NOTE:''' Home assistant needs to know where to find the thermostat; at the same place, every single time. Anytime you attach an IoT device to your network, it is a good practice to give it a static IP. You will find out later in the “syncthing” section why expecting “auto locate” features to work proprerly is a bad idea. Summers are 117 degrees fahrenheit in Texas; I’m not trusting that to DHCP.
</blockquote>
* '''IP Address:''' 192.168.5.18 (or another appropriate IP in your network range)
* '''Gateway:''' 192.168.5.1 (typically your '''pfSense''' router’s IP)
* '''DNS Server:''' 192.168.5.1
* '''Subnet Mask:''' 255.255.255.0

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